ping_pong1
Measures the ping-pong byte range lock latency
Usage
ping_pong {-r | -w | -rw}
[-m]
[-c]
FILENAME
NUM-LOCKS
Overview
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
Releases
7 releases since Debian 7 (Wheezy); the text changed 6 times.
-c since Debian 8 (Jessie).