Hi, Kelly. Heh, you're right, that's a pretty funny document on the TSM
side.
I was of the same mind about dedup until I started getting familiar with
the TS7650. The fact that it's in-line and that it does a binary diff
after signature match addresses most of the concerns that I had. And I
agree, it is expensive, but as a DR-tool it offers a lot of benefit. I
get the heebie-jeebies thinking about not having tape involved at all in
DR, so I guess I just have to figure out what requirements have to be
met before I can feel good about using the "eliminate your tape" line.
:-)
I've recently found out IBM offers TS7650 "appliance" models that come
packaged with disk and everything. Less setup, less angst, just plug it
in and go. With 7TB, 18TB, and 36TB options, these appliances could be
good for smaller sites.
Thanks,
Alex
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Kelly Lipp
Sent: Friday, March 20, 2009 10:12 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] VTL and Dedup ( TS7569G)
Funny, but I was researching the TS7650 yesterday and found this article
on the IBM website. Pretty good detail about the product in a non-TSM
environment.
ftp://service.boulder.ibm.com/storage/tape/ts7650g_esg_validation.pdf
And then this on in the TSM environment. I think this one might have
been written by somebody somewhat less familiar with TSM than we would
be. Seemed a little heavy handed about TSM.
ftp://ftp.software.ibm.com/common/ssi/sa/wh/n/tsw03043usen/TSW03043USEN.
PDF
My overall impression, and I hate all things de-dup, was this is a
pretty good product offering. I'm sure it's way expensive but
understand there are some follow on products coming that will address
the lower end of this market.
Thanks,
Kelly Lipp
CTO
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
719-266-8777 x7105
www.storserver.com
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Alex Paschal
Sent: Friday, March 20, 2009 11:03 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] VTL and Dedup ( TS7569G)
Hi, Sabar.
I couldn't find a TS7569G via Google, but on the TS7650G, also a
deduping VTL, after data goes through the factoring (dedup) algorithm it
is run through a compression algorithm. You probably won't see much
deduplication, but on the first backup you should see a decrease in size
similar to the decrease you would see from the compression on a tape
drive.
Regards,
Alex
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Sabar Martin Hasiholan Panggabean
Sent: Thursday, March 19, 2009 5:10 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] VTL and Dedup ( TS7569G)
Hi,
Does anyone here has been implementing or know how Dedup works in TSM
using TS7569G ? Let say I have 100 TB of data and backup to this VTL. On
the 1st attempt of backup / full backup, will this data size decrease on
the VTL
BR,
Martin P
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