[ClusterLabs] Antw: [EXT] Re: Mirrored cLVM/Xen PVM Performance question for block device

Ulrich Windl Ulrich.Windl at rz.uni-regensburg.de
Tue May 26 02:15:43 EDT 2020

>>> Roger Zhou <zzhou at suse.com> schrieb am 26.05.2020 um 06:33 in Nachricht
<30034_1590467679_5ECC9C5F_30034_275_1_b45312d1-a455-4afb-3a31-b4e4fb28d28c at suse

> Hi Ulrich,
> In your use case, the (clustered) LVM2 mirroring layer is known to be a 
> performance sensive concern. OCFS2 and SLES12 SP5 VM should not be a 
> performance concern in your stack.
> I do see an improvement to upgrade your host to SLES12 SP5 if possible. 
> Hence 
> you can evolve clustered LVM2 mirroring to clustered md raid1 which intends

> to 
> resolve LVM2 mirroring performance concern. You can play with the following

> migration doc. It should apply to SLES12 SP5 too.

> a‑clvm‑migrate

Thanks Roger,

actually I'm really considering that. The reason that we are still running
SLES11 (which worked quite well despite of the aged (somewhat out-dated)
software) is that I didn't get new hardware in time. The current hardware is
about ten years old, but still works well. The new hardware is there already,
but needs to be installed (physically and logically)...


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