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

Lars Marowsky-Bree lmb at suse.com
Mon Apr 25 06:12:36 EDT 2016

On 2016-04-25T10:10:38, Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de> wrote:

Hi Ulrich,

I can't really comment on why the cLVM2 is slow (somewhat surprisingly,
because flock is meta-data only and thus shouldn't even be affected by
cLVM2, anyway ...).

But on the subject of performance, you're quite right - we know that
cLVM2 is not fast enough, thus there has been an effort to make md raid
cluster aware (especially RAID1). cluster-md is almost completely
merged upstream and coming to your favorite enterprise distribution very
soon too ;-)


Architect SDS, Distinguished Engineer
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde

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