Just some remarks
1. Drop 3570 of the list. IBM is withdrawing it so is not good idea to be
used for new install. Also for same capacity you will need bigger
footprint.
2. AIT is not bad but not widely used for TSM. Only few people on this
list can help you with TSM + AIT issues.
3. Depending on how this huge ammount of files will be stored
(backup/archive/HSM) consider either LTO or 3590/9840. But if your
customer had not counted his budget for tape library it does not matter
will it be 3584, 3494 or STK silo. The cherry on top of its $1.2m icecream
will not be cheap :-)
4. 700GB/week is not too much but this backup. We are always discussing
that TSM should be sized not from backup but from restore requirements. If
your requirements are not too high you can even get tiny 2-way Intel box
with single FC adapter. If you need faster restores either use SAN clients
or get to a box with more PCI buses (4-way or more, not necessarily filled
with processors). Look at the recent thread "Win 2K VS AIX".
Hope this may be of use to you.
Zlatko Krastev
IT Consultant
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Subject: opinion on AIT vs LTO and 3570 tape technology?
Hello all,
I am trying to determine what would be the best tape solution for our ARAN
(Automatic Road ANalyzer) van data system. Basically, huge amounts of
jpg,
mdb and xls data is generated (possibly to the order of 700G per week for
20 weeks, and 20G for the remainder of the weeks). This data will be
staged to a 1.55 TB disk array. The customer wants to be able to access
the current year's data and the preceding year's data. The "Terabyte"
server and two or three processing workstations will be on a private
fiber/GigE network, connected by a Catalyst 3550-12G switch.
Having only actually experience with 3590 and 3570 drives, I was hoping
that someone with experience would be able to give me an opinion (nobody
on
this list, right ;-) as to which tape technology would best suit their
situation -- small footprint, hold 5-10 TB of data to start, scalable,
fast
access, fast read and write. Money is an object, but for this exercise
let's just keep it an abstraction. I had originally thought a 3584 with
at
least 3 drives would be a good start, but then I started looking at the
AIT, whose access time beats the pants off of LTO, and thinking that would
be a better solution.
I had briefly thought about HSM, but the enormous number of files and
directories makes it sound like a really bad idea to me. Any thoughts?
I'd also appreciate any ideas about what kind of x86 box would be suited
for the TSM server for this system. My only experience sizing servers is
with enterprises and RS/6000 servers (I can spend a million here and there
for "my" stuff, but this customer has already spend 1.2 million on this
"turnkey" solution, and isn't going to be real happy to hear that for them
to get their stuff to work and have backups and DR, they need to spend an
additional $100,000, but OTOH, that's just deserts for having left IS out
of the loop in the purchase in the first place.)
TIA and have a wonderful Friday!
lisa
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