1PING_PONG(1)             CTDB - clustered TDB database            PING_PONG(1)
2
3
4

NAME

6       ping_pong - measures the ping-pong byte range lock latency
7

SYNOPSIS

9       ping_pong {-r | -w | -rw} [-m] [-c] {FILENAME} {NUM-LOCKS}
10

DESCRIPTION

12       ping_pong measures the byte range lock latency. It is especially useful
13       on a cluster of nodes sharing a common lock manager as it will give
14       some indication of the lock manager's performance under stress.
15
16       FILENAME is a file on shared storage to use for byte range locking
17       tests.
18
19       NUM-LOCKS is the number of byte range locks, so needs to be (strictly)
20       greater than the number of nodes in the cluster.
21

OPTIONS

23       -r
24           test read performance
25
26       -w
27           test write performance
28
29       -m
30           use mmap
31
32       -c
33           validate the locks
34

EXAMPLES

36       Testing lock coherence
37
38                 ping_pong test.dat N
39
40
41       Testing lock coherence with lock validation
42
43                 ping_pong -c test.dat N
44
45
46       Testing IO coherence
47
48                 ping_pong -rw test.dat N
49
50

SEE ALSO

52       ctdb(7), https://wiki.samba.org/index.php/Ping_pong
53

AUTHOR

55       This documentation was written by Mathieu Parent
56

58       Copyright © 2002 Andrew Tridgell
59
60       This program is free software; you can redistribute it and/or modify it
61       under the terms of the GNU General Public License as published by the
62       Free Software Foundation; either version 3 of the License, or (at your
63       option) any later version.
64
65       This program is distributed in the hope that it will be useful, but
66       WITHOUT ANY WARRANTY; without even the implied warranty of
67       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
68       General Public License for more details.
69
70       You should have received a copy of the GNU General Public License along
71       with this program; if not, see http://www.gnu.org/licenses.
72
73
74
75
76ctdb                              06/13/2022                      PING_PONG(1)
Impressum