ADSM-L

Re: Question on SETUP

2005-04-07 02:26:16
Subject: Re: Question on SETUP
From: Paul Fielding <paul AT FIELDING DOT CA>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 7 Apr 2005 00:25:38 -0600
I don't see the value in mirroring the db and logs if they're placed on
Shark disk.   The purpose of TSM's mirroring is to provide disk redundancy
in case of disk failure.   However, the Shark provides it for you.   Why add
the extra overhead of software mirroring when the hardware does a valiant
job in the background. The Quck Start recommendation doesn't take into
account that your disk is already protected...

regards,

Paul

----- Original Message -----
From: "Jones, Eric J" <eric.j.jones AT LMCO DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Wednesday, April 06, 2005 2:56 PM
Subject: [ADSM-L] Question on SETUP


Good Afternoon.
I was asked to setup a new TSM server 5.2.2 on a AIX 5.2 server.
My question has to do with setting up the DB, LOG and DISKPOOL.
On our current servers which run the same O/S and TSM version the DB, LOG
and DISKPOOL are mirrored.
On the new system I'm setting up these are all going to reside on a IBM
SAN(SHARK) which is all RAID.
Is there any reason to mirror them since the mirror would be on the same
set of drives(space was already allocated on a LUN)?
I understand it's always good to mirror(protect DB, LOG, DISKPOOL) but in
this case I'd have to mirror to the same set of disk since I was only
allocated a set of space to work.  In the TSM class it also recommended
that you mirror for protection.
I'm in the middle of reading the "Quick Start" for the second time and I
see they recommend "Mirror your Database and recovery log for "Server and
storage pool protection".  I wanted to make sure there was not a
performance issue or anything else.

Have a Great Day,
Eric Jones
*  eric.j.jones AT lmco DOT com
*:   607-751-4133
Cell : 607-972-7621


<Prev in Thread] Current Thread [Next in Thread>