Hi, David.
TS3500 libraries do not require ALMS for LTO encryption as long as there
are no non-encryption-capable LTO drives mixed in. If you plan to do a
phased migration in the same library from, for example, LTO3 to LTO4,
then you will require ALMS as LTO3 are not encryption-capable.
I have seen libraries partitioned using ALMS for political reasons to
keep certain tape media artificially segregated from other tape media.
I have seen ALMS used to managed mixed drives in the library to enable
encrypting only certain subsets of media.
I seem to recall you can use ALMS to allow drive sharing between library
partitions so that TSM servers can share drives without requiring a
library manager. (I'd have to double-check that before committing to
it.)
My opinion is that ALMS allows more flexibility in configuring and
growing your library environment no matter what backup software you plan
to use. (Although TSM is hands-down the best. :-)
________________________________
Alex Paschal
Storage Solutions Engineer
MSI Systems Integrators
(503) 943-6919 - Office
________________________________
Your Business. Better.
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
David Longo
Sent: Monday, August 17, 2009 2:58 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] ALMS benefit to shared-library management ?
As I understand it, ALMS IS required if you implement Encryption
for LTO4 tapes/drives on a 3584 library, is that true?
David Longo
>>> Paul Zarnowski <psz1 AT CORNELL DOT EDU> 8/17/2009 5:18 PM >>>
We have a couple of 3584s with ALMS, and though we use TSM to share the
library among 9 TSM instances, I still find the VIO features of the 3584
to
be handy. Having up to 255 virtual I/O slots can be nice when adding
tapes
to the library. When switching from one generation of drives and media
to
another, it is nice to be able to flexibly shift slots from the older
generation to the new one. Overall, the virtualization of the library
is a
very nice thing. Is is required? No, not at all. But it's nice!
At 05:04 PM 8/17/2009, Keith Arbogast wrote:
>Wanda,
>Thank you, that was very helpful.
>
>Perhaps ALMS is intended primarily for non-TSM applications. It
>sounds like logical libraries are superfluous if TSM control points
>are used correctly. If I'm going too far with that, please let me
know.
>
>Best wishes,
>Keith Arbogast
--
Paul Zarnowski Ph: 607-255-4757
Manager, Storage Services Fx: 607-255-8521
719 Rhodes Hall, Ithaca, NY 14853-3801 Em: psz1 AT cornell DOT edu
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