[ClusterLabs] Performance of a mirrored LV (cLVM) with OCFS: Attempt to monitor it

[Kristoffer Grönlund]

Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de> writes:

> cLVM has never made a good impression regarding performance, so I wonder if there's anything we could do to improve the4 performance. I suspect that one VM paging heavily on OCFS2 kills the performance of the whole cluster (that hosts Xen PV guests only). Anyone with deeper insights?

My understanding is that this is a problem inherent in the design of
CLVM and there is work ongoing to mitigate this by handling clustering
in md instead. See this LWN article for more details:

http://lwn.net/Articles/674085/

Cheers,
Kristoffer

-- 
// Kristoffer Grönlund
// kgronlund at suse.com