Re: LVM and Raid5

"Majed B." [off-list ref] writes:

Hello,

I'm the one who ran those tests with LVM vs. RAID5 and I think I have
faced speed difference because I have disks of varying speeds
(different models and vendors), and I believe that LVM gets crippled
down to the speed of the slowest disk.

On Wed, Sep 16, 2009 at 1:09 PM, Goswin von Brederlow [off-list ref] wrote:

quoted

Linux Raid Study [off-list ref] writes:

quoted

Hello:

Has someone experimented with LVM and Raid5 together (on say, 2.6.27)?
Is there any performance drop if LVM/Raid5 are combined vs Raid5 alone?

Thanks for your inputs!

Has always worked perfectly for me and i can't say I noticed any
performance change.

MfG
       Goswin

But the question was raid5 vs lvm+raid5. The raid5 gets cripled down
to the slowest disk and speeds up due to striping. The LVM should not
have any noticeable effect on top of that.

MfG
        Goswin
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