[Linux-PowerEdge] Extremely poor performance with LVM vs. RAW disc

Dennis Jacobfeuerborn dennisml at conversis.de
Mon Nov 5 09:22:43 CST 2012


On 11/01/2012 10:32 PM, James A. Peltier wrote:
> ----- Original Message -----
> | Once upon a time, Gregory Gulik <ggulik at reachmail.com> said:
> | > You brought up possible bug so I checked the firmware.
> | > Turns out it wasn't current so I upgraded and rebooted.
> | > I'm still testing but it looks WAY faster.  It looks so much better
> | > that
> | > I'm not trusting my testing methodology.
> | 
> | I'd check out bonnie++, which should be available packaged by your
> | distribution of choice.
> | --
> | Chris Adams <cmadams at hiwaay.net>
> | Systems and Network Administrator - HiWAAY Internet Services
> | I don't speak for anybody but myself - that's enough trouble.
> 
> You may wish to look at not using partitioning at all and instead use whole disk physical volumes.  It's much more efficient then partitions and doesn't suffer from the problems of misalignment.  File systems like XFS can use whole disk PVs much better as well.
> 

In what way exactly is using whole disks more efficient than a partition
and why can XFS "use it better"?

Regards,
  Dennis



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