PING_PONG - Online Linux Manual PageSection : 1
Updated : 11/27/2013
Source : ctdb
Note : CTDB − clustered TDB database
NAMEping_pong − measures the ping−pong byte range lock latency
SYNOPSISping_pong {−r | −w | −rw} [−m] [−c] {FILENAME} {NUM−LOCKS}
DESCRIPTIONping_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
EXAMPLESTesting 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 ALSOctdb(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. 0
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