From: Justin Willoughby (jwilloug@mhc.net)
Date: Wed Aug 25 2004 - 13:55:34 EDT
As I expected most everyone said read performance should improve if I am
mirroring to faster disks/arrays compared to the disks the LVs are on
now. That is reads should be from the least busy disk. It was also
mentioned by a few people that Mirror/UX is not designed to be fast but
more for HA. I don't think anyone had any documentation right from HP
about the read performance being better with Mirror/UX.
I have started mirroring today so we will see if I see any improvement
or not... Thanks again to all who replied!
- Justin
==================
Justin Willoughby
Computer Operations
==================
>>> "Justin Willoughby" <jwilloug@mhc.net> 8/18/2004 1:15:46 PM >>>
I looked on the HPUX-Admin archive and hp itrc but have not found what
I am looking for.
I am going to be mirroring at the OS level an application VG between
two separate fiber channel arrays. What I would like to know is how
does
HPUX/LVM know which array/disk to read from? I would assume it does a
write to each array/disk at the same time but when it reads I am guess
it only reads from one of the arrays.
I am just trying to figure out if I am going to see any performance
gains if my application does more reads then writes.
Thanks,
- Justin
==================
Justin Willoughby
Computer Operations
==================
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