From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Fri Oct 11 2002 - 12:32:02 EDT
The difference is in the stripe size. Doing striping at the partition level
gives you strips of, say 16MB. A proper striped LV will have stripes of a
few kB. An I/O operation will only benefit from striping if it is writing
data that spans two stripes. That's not terribly likely with a 16MB stripe;
probably only going to affect backup/recovery and things like tablespace
scans.
With a smaller stripe, many more I/O operations will be able to benefit.
I can't comment on which is best for you.
Simon Green
Philip Morris ITSC Europe
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-----Original Message-----
From: Holger.VanKoll@SWISSCOM.COM [mailto:Holger.VanKoll@SWISSCOM.COM]
Sent: 11 October 2002 12:43
To: aix-l@Princeton.EDU
Subject: Re: migrating a filesystem/lv from one disk to two disks
>Another option would be to delete the filesystem, recreate it
Well, I thought about this. I could create a "real" striped lv/filesystem
then.
However, I never tested the performance of a striped LV versus a LV thats
distributed manually between several volumes?
Is this a big difference in performance? What is the technical difference at
all?
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