ping_pong man page on Oracle
[printable version]
PING_PONG(1) CTDB - clustered TDB database PING_PONG(1)
NAME
ping_pong - measures the ping-pong byte range lock latency
SYNOPSIS
ping_pong {-r | -w | -rw} [-m] [-c] {FILENAME} {NUM-LOCKS}
DESCRIPTION
ping_pong measures the 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 manager's performance under stress.
FILENAME is a file on shared storage to use for byte range locking
tests.
NUM-LOCKS is the number of byte range locks, so needs to be (strictly)
greater than the number of nodes in the cluster.
OPTIONS
-r
test read performance
-w
test write performance
-m
use mmap
-c
validate the locks
EXAMPLES
Testing lock coherence
ping_pong test.dat N
Testing lock coherence with lock validation
ping_pong -c test.dat N
Testing IO coherence
ping_pong -rw test.dat N
SEE ALSO
ctdb(7), https://wiki.samba.org/index.php/Ping_pong
AUTHOR
This documentation was written by Mathieu Parent
COPYRIGHT
Copyright © 2002 Andrew Tridgell
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.
ctdb 11/27/2013 PING_PONG(1)
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