Re: [CentOS] to lvm or not to lvm - why/when to use lvm

On 9/27/2013 9:39 AM, Phil Gardner wrote:

So we can generally say that LVM offers no real drawbacks in terms of flexibility, but it seems like we are mostly talking about homebrew setups.

What about in a high iops situation? Is there any evidence/testing out there that might show that there is some overhead of LVM that might impact total throughput?

I ran quite a lot of disk IO benchmarks awhile back on both JBOD and hardware raid SAS configurations with high performance 15000 rpm drives as well as 7200rpm nearline drives... I found zilch significant difference between using a direct file system and LVM with either ext4fs or xfs. what differences i saw were down in the statistical noise and not repeatable.