ping_pong man page

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_p…

Author

This documentation was written by Mathieu Parent

Referenced By

ctdb(7).

11/07/2016 ctdb CTDB - clustered TDB database