P2P Guide

Table of Contents

1. Introduction
2. Architecture
3. Tutorial
4. Node Master Usage
5. Protocol
6. Node API
7. Command of a Client

Introduction

This document describes Hyper Estraier's client/server (C/S) and peer to peer (P2P) architecture. If you haven't read user's guide yet, now is a good moment to do so.

There was several problems which where motivation for C/S architecture. estseek.cgi is inefficient because it reconnects to database for each search query. Database updates using estcmd prevents searches on same database because estcmd uses locks when doing update. To solve those problems, estmaster server process is provided. This is resident (daemon) process which has control over database and provides services via network.

This approach also leads to following advantages:

• server and clients can be distributed across different machines
• multiple clients and servers can work in parallel
• client crash doesn't leave database in inconsistent state
• clients implementation isn't specific to any programming language

Protocol between clients and servers is based on HTTP, so normal web browsers can be used as simple clients. Clients can be implemented using any languages which supports HTTP protocol like JavaScript or Flash.

Distributed processing is based on peer to peer (P2P) architecture. This allows horizontal scalability. For example, if you use 10 servers, each with million documents, you can search 10 million documents without much additional effort. Since all servers are equal, search service is provided even if some of servers are unavailable. There is notion of relevance of each index which can improve search results (if some parts of index are more important that others).

This document describes the node API which can be used by client applications to implement search and update capabilities without using network protocol between client and server. The node API is implemented by not only C language but also Java and Ruby.

Architecture

This section describes the P2P architecture of Hyper Estraier.

Node Master and Node Server

When using multiple indexes, it is highly inefficient to run one server for each index. estmaster is server process (daemon) implemented as single process available on network through HTTP protocol on some hight port that provides services for multiple indexes. This component is called node master. Each index has it's own unique URL which is served by node server. You can think about node server as a virtual servers for each index within one node master.

Client application just need to know URL of node server and issue queries to it on any available node masters. Term node corresponds to peer in P2P architecture. Clients can also connect to node masters directly to manage configuration of that master.

Meta Search and Credit

Each node server can have unidirectional links to other node servers. This allows distributed searching called meta search. When client sends query to node server, it will forward that query to all other node servers and merge responses before sending result back to client.

Meta search is performed hierarchically. Loops in links are detected and restrained automatically, so searching is always performed on tree structured network of nodes. This allows infinite scalability just by adding additional nodes.

There is a notion of relevance for each link between nodes called credit. It's used for weighting of scores when merging results from different nodes. Document coming from node with larger credit will have higher rank in search results. Application can set links and credits for them, and this allows improving of search precision by modifying credits of frequently used nodes.

Authentication

Client connections to node master or node server are authenticated using login names and passwords. Users and permissions are defined on node masters and all node servers on that master inherit those permissions. Users are divided into two groups: super users and normal users. Normal users have permission to search index while super users also have permission to create and update indexes. Moreover, for each node, normal users are divided into administrators and guest users.

Tutorial

Concept of P2P seems difficult at first, so it's best to start with a tutorial which will show commands used to setup search network.

Start and Stop

First step is creation of node master directory which contains configuration files and indexes. Following command will create casket root server directory:

estmaster init casket

Next, we need to start node master using:

estmaster start casket

To stop node master you can press CTRL-C on terminal in which it's running on issue following command:

estmaster stop casket

Administration Interface

After starting node master you can access it's administration interface pointing web browser at http://localhost:1978/master_ui. This will bring HTTP authorization dialog requesting user name and password. Enter "admin" and "admin". You will be presented with administration commands menu.

First option is Manage Master which provides options to shutdown node master and to synchronize databases. However, they are not used for now.

Since you are logged as admin which has super user privileges, we can edit users. We will create new account with super user privileges and switch to it. We will also erase admin user because it has well-known password and it's possible security hole.

Select Manage Users. There are input boxes for user name, password, flags, full name and miscellaneous information at bottom. Enter following data for new user: "clint", "tnilc", "s", "Clint Eastwood" and "Dirty Harry". Flag "s" denotes user with super user privileges. User name is limited to alphanumeric characters only.

You can now delete admin user using DELE link and confirm that by clicking on sure button.

Select Manage Nodes next. Since we just erased admin user, you will be again asked for user name and password. Enter "clint" and "tnilc" to login again. Input boxes at bottom allows you to enter new index name and label. Index name is limited to alphanumeric characters. Enter "test1" as name and "First Node" as description. Create another node with name "test2" and "Second Node" as description.

Register Documents

We'll now register new documents in index. For that, we will again use command-line utilities. Since terminal in which you started estmaster is busy outputting log messages, open another one.

Documents which are about to be registered in index must be in document draft format described in User's Guide. Create file data001.est with following content:

@uri=data001
@title=Material Girl

Living in a material world
And I am a material girl
You know that we are living in a material world
And I am a material girl

We are going to register this document to node test1. Since updating of index needs super user permissions, we will use -auth option to specify user name and password of user that we created in previous step.

estcall put -auth clint tnilc http://localhost:1978/node/test1 data001.est

Document registration will finish shortly, and absence of any error message denotes that it has been successful.

To demonstrate meta search mentioned before, we will register another document to node test2. Create file data002.est with following content:

@uri=data002
@title=Liberian Girl

Liberian girl
You came and you changed My world
A love so brand new

Then, register document using:

estcall put -auth clint tnilc http://localhost:1978/node/test2 data002.est

As you can see, it's possible to register documents from any machine connected to network on which estmaster is running. You can register few additional documents if you want now.

Search for Documents

Next step is to find some of documents we just registered. You can try search by executing:

estcall search http://localhost:1978/node/test1 "material world"

This will produce search result with draft of the document including phrase material world.

We can also create a link between two nodes and try meta search. We need super user, URL of source and destination node, link name and credit.

estcall setlink -auth clint tnilc http://localhost:1978/node/test1 \
  http://localhost:1978/node/test2 TEST02 8000

This command creates link from node test1 to node test2 called TEST02 and assign it credit of 8000.

You can now repeat search and add option -dpt which will activate meta search over both nodes.

estcall search -dpt 1 http://localhost:1978/node/test1 "girl"

Although your search is accessing node test1, we can see merged results from test2. Since nodes can be located on separate machines, meta search enables us to do distributed processing using P2P architecture described before.

We can also influence ranking of results by increasing credit for particular node. If we change it to 12000 and re-run search we will see different ranking of results.

estcall setlink -auth clint tnilc http://localhost:1978/node/test1 \
  http://localhost:1978/node/test2 TEST02 12000

Results can also be returned in XML format which is defined in estresult.dtd.

estcall search -dpt 1 -vx http://localhost:1978/node/test1 "girl"

Each node server also has a web search interface. You can go to http://localhost:1978/node/test1/search_ui and access search interface of node test1.

Node Master Usage

estmaster is provided as a command to manage the node master. This section describes how to use estmaster.

Synopsis and Description

estmaster is an aggregation of sub commands. The name of a sub command is specified by the first argument. Other arguments are parsed according to each sub command. The argument rootdir specifies the server root directory which contains configuration file and so on.

estmaster init [-ex] rootdir

Create the server root directory.

If -ex is specified, some users and some nodes are set for example. By default, only a super user whose name and password are both "admin" is set.

estmaster start [-bg] [-st] rootdir

Start the node master.

If -bg is specified, the server runs in background as a daemon process.

If -st is specified, the server runs in single thread mode.

estmaster stop rootdir

Stop the running node master.

estmaster unittest rootdir

Perform unit tests.

estmaster crypt key [hash]

Output an encrypted string of a string.

key specifies a target string.

If hash is specified, it checks whether the key and the hash matches.

All sub commands return 0 if the operation is success, else return 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). 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A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). 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A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). 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A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). 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A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1 (SIGHUP), the process is re-start and eturn 1. A running node master finishes with closing the database when it catches the signal 1 (SIGHUP), 2 (SIGINT), 3 (SIGQUIT), or 15 (SIGTERM). Moreover, when a node master running as a daemon catches the signal 1