Originally posted by: Akim
We created 4 * 500GB Luns on 2 Different Sata Raid group in order to create a Striped lun of 2TB on a server based on Centos 4.4 Linux OS.
After Lun mapping and as soon we start mkfs to create filesystem on the new logical Volume, the AMS1000 suffer on performance and impacted all others servers connected to it.." Everything wa very slow"
Here some measure i got running perfmon on storage Nivigator during creationg of FS
Write Pending Rate(%) on CTRL reach 30 %
IO(Rate) on CTRL1 was no so much 127 IOs where 109 Write
As soon as sw kill mkfs everything go back to normal situation...
Could host striping be the problem ?
LVM block size are 4mb
In normal situation CPU usage are at: