ADSM-L

Re: [ADSM-L] 5.4 --> 6.0 (server)

2008-12-21 15:19:36
Subject: Re: [ADSM-L] 5.4 --> 6.0 (server)
From: "Gee, Norman" <Norman.Gee AT LC.CA DOT GOV>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Sun, 21 Dec 2008 12:18:37 -0800
What is your opinion of placing the DB2 database on a DS8300 or any
other high end SAN? (RAID 5 only, all 15K drives) parity write overhead.
Is it possible to access both a DS-4200 and a DS-8300 from the same pair
of FC cards?  Different multipath drivers. 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Remco Post
Sent: Sunday, December 21, 2008 3:26 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 5.4 --> 6.0 (server)

On 21 dec 2008, at 08:56, Gee, Norman wrote:

> I guess with the rumor conversion to DB2, it would no longer be
> feasible
> to place the database on JBOD mirror by TSM.  The recommendation may
> be
> RAID 5 or 6 storage with fibre channel disks and not SATA disks. Am I
> close?

Well, even with current TSM levels I would only use 15kRPM disks in
RAID1. DB2 has no software mirroring, but your OS might very well do
the job for you, I know that Linux and AIX can, and I think recent
windows levels can do the same. RAID5 or RAID6 are great technologies,
but I don't believe that they mix very well with high performance
databases, not for TSM <= 5.5, and not for DB2 either.

SATA disks are only useful in very small TSM environments (up to a few
gig database), and well, that wont change much with DB2.

--
Met vriendelijke groeten/Kind regards,

Remco Post, PLCS
+31624821622