[Pacemaker] DRBD < LVM < EXT4 < NFS performance
Christoph Bartoschek
ponto at pontohonk.de
Sun Jun 10 12:17:50 UTC 2012
Hi,
we did not solve the performance issue yet. However we could improve the
responsiveness of the system. We no longer get timeouts and reenabled
pacemaker.
The problem that lead to an unresponsive system was that Ubuntu 12.04 LTS
uses the cfq I/O-Scheduler by default. Ubuntu 10.04 LTS used the dedline
scheduler.
After changing the scheduler to deadline on 12.04 the load drastically went
down and we get not timeouts.
Christoph
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