11-23-2016
Are these local disks or hardware protected in some way? (SAN provided, RAID device etc.)
The reason I ask is that you have a single copy of each PP. On real hardware you might lose the LV if any disk fails. If it is hardware protected, then you might be causing yourself an IO overhead by striping. I know it sounds counter-intuitive, but I've seen issues where spreading IO according to how the OS sees it can cause contention on the real disks when a SAN also spreads the IO. Bizarrely we improved IO when we tried to create hot-spots as the OS saw it because the SAN then really did spread the heavy IO properly.
Can you explain a little more about what hardware you have in play?
Thanks,
Robin
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LEARN ABOUT DEBIAN
mkqdisk
mkqdisk(8) Quorum Disk Management mkqdisk(8)
NAME
mkqdisk - Cluster Quorum Disk Utility
WARNING
Use of this command can cause the cluster to malfunction.
SYNOPSIS
mkqdisk [-?|-h] | [-L] | [-f label] [-c device -l label] [-d [-d ...]]
DESCRIPTION
The mkqdisk command is used to create a new quorum disk or display existing quorum disks accessible from a given cluster node.
OPTIONS
-c device -l label
Initialize a new cluster quorum disk. This will destroy all data on the given device. If a cluster is currently using that device
as a quorum disk, the entire cluster will malfunction. Do not run this on an active cluster when qdiskd is running. Only one
device on the SAN should ever have the given label; using multiple different devices is currently not supported (it is expected a
RAID array is used for quorum disk redundancy). The label can be any textual string up to 127 characters - and is therefore enough
space to hold a UUID created with uuidgen(1).
-f label
Find the cluster quorum disk with the given label and display information about it.
-L Display information on all accessible cluster quorum disks.
-d Increase debugging level. Specify multiple times for more information. Currently, specifying more than twice has no effect.
SEE ALSO
qdisk(5), qdiskd(8), uuidgen(1)
July 2006 mkqdisk(8)