ADSM-L

[ADSM-L] NDMP Restores: DAR VS File Level

2008-11-13 17:16:46
Subject: [ADSM-L] NDMP Restores: DAR VS File Level
From: Shawn Drew <shawn.drew AT AMERICAS.BNPPARIBAS DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 13 Nov 2008 17:15:39 -0500
Just learned something, thought I'd pass it along.  I just finished with
one of the eseminars that someone recently posted about the IBM "N-Series"
Netapps
I just wanted to review what I thought I already new.  There was one
little tidbit on there that I thought was pretty valuable, and I've never
seen it on this list.  (Also didn't come up in a search)

There are 2 types of TSM NDMP restores
- DAR - "Direct Access Recovery"
- File Level Restore

- A File Level Restore is when it has to scan the whole backup image to
find the requested files.
- a DAR restore has the exact location of the file, so the restore can
jump straight to the file location and restore it

The only way to get a DAR restore is to use the web gui and select ONLY
one file.  Command line restores or web restores of more than one file
fall back to the "file-level" restores.

So if you have 2 or 3 files to restore, it may be worth it to do them one
at a time.

Regards,
Shawn


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