PING_PONG(1)

NAME
ping_pong - measures the ping-pong byte range lock latency

SYNOPSIS

ping_pong [options] <file> <num_locks>

ping_pong [-r] [-w] [-m]

DESCRIPTION

This measures the ping-pong byte range lock latency. It is especially useful on a cluster of nodes sharing a common lock manager as it will give some indication of the lock managers performance under stress.

OPTIONS

-r
    do reads

-w
    do writes

-m
    use mmap

EXAMPLES

Testing lock coherence

          ping_pong test.dat N

Testing IO coherence

          ping_pong -rw test.dat N

SEE ALSO

https://wiki.samba.org/index.php/Ping_pong, ctdb(1), ctdbd(1)

COPYRIGHT/LICENSE

    Copyright (C) Andrew Tridgell 2002
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or (at
    your option) any later version.
    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program; if not, see http://www.gnu.org/licenses/.