ADSM-L

Re: backup/recovery

2001-12-26 15:02:29
Subject: Re: backup/recovery
From: "Prather, Wanda" <Wanda.Prather AT JHUAPL DOT EDU>
Date: Wed, 26 Dec 2001 15:00:08 -0500
You can multi-thread your restores as well.

It doesn't occur automatically, but if your fileserver has more than one
drive/filesystem, just open a second GUI window and start a second or third
restore, one for each filesystem/drive.

Even if the restores call for all the same tapes, assuming you have more
than 1 tape drive you can get a lot of parallelism.  Restore number 2 may
have to wait for a tape until restore number 1 is finished with it, but then
while restore number 1 is processing the next tape, restore number 2 gets
his tape and gets work done, and so forth, until you either saturate your
network or run out of tape drives.

Doesn't work too well on an NT system if your data is on multiple LOGICAL
C:, D;, E: drives, but are really all the same physical drive, since you
create contention for the physical device.  But if your 300 GB is spread
across multiple physical disk drives, you should be able to improve your
throughput quite a bit.


************************************************************************
Wanda Prather
The Johns Hopkins Applied Physics Lab
443-778-8769
wanda_prather AT jhuapl DOT edu

"Intelligence has much less practical application than you'd think" -
Scott Adams/Dilbert
************************************************************************




 

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