[Pacemaker] DRBD < LVM < EXT4 < NFS performance

[Christoph Bartoschek]

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