Re: striped LV and expected performance

Zdenek Kabelac <[email protected]> Fri, 18 Jul 2025 15:46:49 +0200
Newsgroups gmane.linux.lvm.general
Message-ID <[email protected]>
Dne 18. 07. 25 v 14:24 Henry, Andrew napsal(a):
>> Maybe you virtual system does have it self 'a single write pipe' - so any parallelization is stopped right there - so maybe you should start first with bare metal....
> 
> This is what I suspect is happening, as the back-end storage is very fast.  I'm going to test on a physical server instead.
> 
> /AH

It's crucially important to be sure - you have independent drives & controller 
paths to them.

It's really pointless trying to setup a 'stripe' on top of 3 drives that are 
at the end served by a singly physical storage behind the scene - this likely 
can explain rather horrible numbers you get when you are trying to use stripe 
-  in such case simply join devices 1-by-1....

Zdenek