ADSM-L

Re: PMR 02528, 082

2003-02-07 09:55:49
Subject: Re: PMR 02528, 082
From: Michelle Wiedeman <michelle.wiedeman AT MULTRIX DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 7 Feb 2003 15:50:24 +0100
Hi bill,

What people tend to forget is that y=the data in your diskpool is actual
data comming from your clients, your data is therefore not really "lost".It
is possible to make an administrative schedule which starts after all
backups have finished, which backes up your diskpool before it starts
migrating. But I feel it costs to amny tapes to do so. Its a choice you have
to make and also depends on how your schedules are organised.
striping is a good one for performance, We dont use that because we have our
diskpool spread out over approx 40 disks (more due to the lack of large
disks though but the performance is great)
concerning your database, u should have tsm mirrors for those , keep an eye
on the way its mirrored though, tsm does not require seperate disks for the
mirrors, so make sure you do appoint the database mirror to a place which
already resides on a seperate disk.

I hope this helps you a little bit,

Mi©helle


-----Original Message-----
From: William Rosette [mailto:Bill_Rosette AT PAPAJOHNS DOT COM]
Sent: Friday, February 07, 2003 3:19 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: PMR 02528, 082


Does any TSM gurus have any suggestions for our AIX admin

Thank You,
Bill Rosette
Data Center/IS/Papa Johns International
WWJD
----- Forwarded by Bill Rosette/IS/Corporate/Papa Johns on 02/07/2003 09:20
AM -----

                      Steven Schraer
                                               To:       hulls AT us.ibm DOT com
                      02/06/2003 05:09         cc:       Bill
Rosette/IS/Corporate/Papa Johns
                      PM                       Subject:  PMR 02528, 082





We are having some problems with the first link below.  The second is
working.

I have been looking at the Redbook.  Gettting started with Tivoli Storaage
Manger: Implementation Guide.

It looks like for storage pools are recommend for raid 0 (mirroring), raid
0+1 (mirroring & stripping) or raid 5 (distributed parity).  These are safe
methods to protect the storage pool.  Do you know of any companies that use
just raid 1 (stripping) on their storage pools?  Is there an issue of tsm
loosing a storage pool and the database having issues due to the lost
storage pool data?

Also there is no suggested raid for the tsm database.  Since we mirror the
tsm database with the tsm software, can we use raid 1 (stripping) so that
we can get a performance increase on accessing the database?  Or should we
just create the volume group with no raiding but lay the database over
multiple smaller disk (i.e. use eight 18.2 Gig disk instead of 4 36.4 Gig
disk).  What will give us the best performance.

Can I get an answer on this tomorrow morning.  I have a meeting to discuss
the performance issues tomorrow (Feb 7, 2002).

Thanks for your assistance!

Steven M. Schraer
502-261-4148
----- Forwarded by Steven Schraer/IS/Corporate/Papa Johns on 02/06/2003
04:57 PM -----

                      Bill Rosette
                                               To:       Steven
Schraer/IS/Corporate/Papa Johns@Papa Johns
                      02/06/2003 03:51         cc:
                      PM                       Subject:  PMR 02528, 082





Could not get into the link below.

Thank You,
Bill Rosette
Data Center/IS/Papa Johns International
WWJD
----- Forwarded by Bill Rosette/IS/Corporate/Papa Johns on 02/06/2003 03:53
PM -----

                      Stephen Hull
                      <hulls AT us.ibm DOT com        To:
bill_rosette AT papajohns DOT com
                      >                        cc:
                                               Subject:  PMR
                      02/06/2003 03:36
                      PM






Hi Bill,
     Here is a link to the Performance Tuning Guide on the web:
ftp://w3.ibm.com/support/ats/documents/TSM42PDG.pdf

Regards,
Stephen Hull
IBM Tivoli Storage Manager Support

More questions?  Search our new TSM KnowledgeBase at:
http://www-3.ibm.com/software/sysmgmt/products/support/IBMTivoliStorageManag
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