Networker

Re: [Networker] Version 7 Speed

2003-07-09 03:15:09
Subject: Re: [Networker] Version 7 Speed
From: Neil Atkins <neil.atkins AT WHL.CO DOT UK>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Wed, 9 Jul 2003 08:14:34 +0100
That could be a big part of it as we certainly did see it processing more
savesets at a time during the recovery.
Regards,
Neil

----- Original Message -----
From: "Robert Maiello" <robert.maiello AT MEDEC DOT COM>
To: <NETWORKER AT LISTMAIL.TEMPLE DOT EDU>
Sent: Tuesday, July 08, 2003 4:58 PM
Subject: Re: [Networker] Version 7 Speed


> 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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