Hi
Today I've updated to kernel-2.6.32-754.14.2.el6.x86_64 and this generated a terrible drop in disk performance on my raid.
As a reference dump give an average speed of about 120 mb/sec using kernel-2.6.32-754.12.1.el6.x86_64 while on kernel-2.6.32-754.14.2.el6.x86_64 I get only about 63mb/s (not enough to feed my backup tape drive)
Meanwhile I had to downgrade to previous kernel.
Do you have any idea of why does this happen?
Thank You
K.
Disk (mdraid) performance degradation with kernel-2.6.32-754.14.2.el6.x86_64
Re: Disk (mdraid) performance degradation with kernel-2.6.32-754.14.2.el6.x86_64
Nope. You need to supply a bucket load more details.
Re: Disk (mdraid) performance degradation with kernel-2.6.32-754.14.2.el6.x86_64
What info do you need?
Re: Disk (mdraid) performance degradation with kernel-2.6.32-754.14.2.el6.x86_64
What kind of I/O is experiencing the issue(s)?
What RAID? Hardware? Software? Whos? What level?
What storage is being used?
A dump of what (
What RAID? Hardware? Software? Whos? What level?
What storage is being used?
A dump of what (
) using what?As a reference dump
At a guess the various firmware updates (from microctl or whatever the service is called) - you don't say what your use case is.Do you have any idea of why does this happen?