PING_PONG(1)															      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/.

								    03/26/2011							      PING_PONG(1)