Re: [ADSM-L] External Disk Unit and TSM Deduplication
2011-11-16 01:33:52
Hi Neil,
We don't need LAN free backup and we won't that.
There is no problem about using file device class.
We won't change TSM license model.
We wonder about tsm deduplication is good and safe or not. We tested it in the
test system but we havent got experience on the production. If it can do
deduplication well(like as hardware solutions) we will buy an external disk
devices. If not we will buy a new LTO library and we won't use deduplication.
Thanks
Alper
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Neil Schofield
Sent: Tuesday, November 15, 2011 8:17 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] External Disk Unit and TSM Deduplication
Alper
I've been giving a bit of thought to this myself recently, although it's more
of an academic exercise since we're not in the market for a new library at the
moment.
Some things you may want to consider:
Do you (now or in the future) have a requirement for LAN-free backup? I would
expect this to be significantly harder with a FILE device class compared to a
physical/virtual tape library solution.
Are you considering switching to a capacity-based TSM license model? If so then
I've been told that it's the volume of primary storage after TSM de-dupe but
before hardware-level de-dupe/compression that counts, which may incline you
more towards the disk-based solution.
Either way I'd be interested to hear what you decide.
Regards
Neil Schofield
Technical Leader
Data Centre Services Engineering Team
Yorkshire Water Services Ltd.
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