Networker

Re: [Networker] Why is cloning so slow ?

2003-04-09 16:31:28
Subject: Re: [Networker] Why is cloning so slow ?
From: Paul Crossman <pcrossma AT WILDFIRE DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Wed, 9 Apr 2003 16:31:25 -0400
It depends on how interleaved the tape is.  If you've got 32 parallel
sessions, of which one is the informix backup, then the cloning will be
slow.  If you've got 8 parallel sessions, you're cloning will be
noticibly faster.

I get between 5 and 25 MB/s on my SDLT220 drives.

Paul C.

On Wed, 2003-04-09 at 16:27, Julio Porras wrote:

> I am cloning an Informix full archive using our HP A4846A tape library (with
> 2 DLT 7000 tape drives) and it's taking too long to run. It's going at 2500
> to 3000 KB/s (for a 90GB data volume). Is this speed normal? What max speed
> should I expect for my hardware?
>
> Thx,
> Julio Porras
> Especialista de Sistemas
> CVG Venalum
> 286-9506898
> 416-7985875
>
>
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--
Paul Crossman @ Wildfire Communications, Inc.
Senior Unix Systems Administrator
Phone & Fax:  781-778-3517
Email:  pcrossma AT wildfire DOT com


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