Networker

Re: [Networker] Version 7 Speed

2003-07-08 11:58:43
Subject: Re: [Networker] Version 7 Speed
From: Robert Maiello <robert.maiello AT MEDEC DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Tue, 8 Jul 2003 11:58:38 -0400
Have not worked with 7.0 yet.  A first guess at this speed difference
would be;   perhaps 7.0 restores are mounting and reading from the
tapes in parallel  (needs to use a debug option in 6.x)??

Robert Maiello
Thomson Healthcare


On Tue, 8 Jul 2003 11:12:01 -0400, Neil Atkins <neil.atkins AT WHL.CO DOT UK> 
wrote:

>Hi,
>
>Last week we performed a DR test on a HP client that runs off an AIX
>Networker server (version 6.02) at a remote site. The recovery went fine
>with the clients data (about 75Gb compressed / 140Gb native) coming back
>fully in under 5 hours which was acceptable to us.
>
>At the end of the test we decided that we should use some free time to try
>out version 7 in the test environment to see if it was worth the hassle of
>moving our live servers back at the office to the new version.
>
>We found that the backup under version 7 was very quick (around an hour)
>but as the hardware was faster than what the client usually runs on and the
>tape drives (DLT 7000s) were local to the client, we were just pleasantly
>suprised.
>
>What did suprise us was that the restore from the V7.0 savesets took less
>than an hour. Getting quite interested, we thought it would be useful to
>recover the data from the tapes created with Legato 6.02 which we had used
>for the DR test (remember that these took 5 hours to recover under version
>6.02 on this exact hardware and setup). This recovery took under 1 hour and
>2 further tries confirmed this to be true.
>
>All of the HP filesystems were wiped with newfs before the recoveries so
>the tests should have been done under the same conditions.
>
>Can anyone tell me if they have seen the same under version 7? Is this down
>to the new and faster format for the res files?
>
>Thanks,
>Neil
>
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