[linux-lvm] Wierd lvm2 performance problems
Sven Eschenberg
sven at whgl.uni-frankfurt.de
Sat Apr 18 22:25:16 UTC 2009
Dear list,
I tried to create a PE+VG+LV ontop of a mdraid. For no obvious reason
the lvm volume show extremely poor performance - The transferrates are
as little as 30% of the rates on the md device itself.
In contrast creating a partition table ontop of the array gives nearly
no performance impact.
Does anybody have the slightest idea, wht might be going wrong here?
Regards
-Sven
P.S.: I tried aligning the first PE in the VG with the mdraid chunk
size, no difference whatsoever.
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