ADSM-L

Re: Tape Library Capacity Requirement.

2002-03-11 08:58:22
Subject: Re: Tape Library Capacity Requirement.
From: Daniel Sparrman <daniel.sparrman AT EXIST DOT SE>
Date: Mon, 11 Mar 2002 14:55:22 +0100
Hi

It sounds like you're going to use a "full backup" software such as Legato.
However, I will do my estimates based on TSM, which uses incremental
backups, and version management to be able to do point-in-time restores of
files(older version of a file than the latest) and applications.

I'd probably propose a IBM 3584 Anaconda with at least 3 drives, preferable
fibre attached.

I guess that you are going to use TSM with this library. Therefore, you
will probably not use full backups, but incremental. And, on fileservers, I
recommend using more than  3 versions(which is standard within TSM). This
will grow your total storage by the number of versions you want to use.

It' very hard to calculate total storage requirements, when you don't tell
us what kind of data that is going to be kept in the library(SQL databases,
fileservers and so on).

However, you can count with about 10% change every night on a fileserver,
and, if not to large, use full backups of databases.

I'd say you'll be storing about 10TB total, and preferable, have media
protection using copypools, which means another 10TB.

Best Regards

Daniel Sparrman
-----------------------------------
Daniel Sparrman
Daniel Sparrman
Exist i Stockholm AB
Bergkällavägen 31D
192 79 SOLLENTUNA
Växel: 08 - 754 98 00
Mobil: 070 - 399 27 51


                                                                                
                                                       
                      Zosimo Noriega                                            
                                                       
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Please help me to calculate the require capacity of the tape library.  I
have 3.7 TB of data and 4 versions of Archive (with 30 days retention
period) and 1 version of backup (full backup) will be implemented.

How can i calculate the required capacity?

Thanks for your help in advance.

Zosi Noriega
ADNOC-UAE.


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