Yeah! it looks the same way to me.  The filers are connected to the library 
through a GbE switch.  The backups happen only through NDMP.  So I doubt if the 
server gets actively involved in transfer of data during backup.

- Krishnan

-----Original Message-----
From: Matthew Huff [mailto:mhuff AT OX DOT COM]
Sent: 11 March 2004 16:13
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Slow filer backups


If you are doing NDMP backups, which it sounds like you are, the Sun
really isn't a factor.

----
Matthew Huff           | One Manhattanville Rd
Director of Operations | Purchase, NY 10577
OTA LLC                | Phone: 914-460-4039 
http://www.otaotr.com  | Fax:   914-460-4139    

> -----Original Message-----
> From: Krishnan, Ramamurthy (Temp) 
> [mailto:Ramamurthy.Krishnan AT KPMG.CO DOT UK] 
> Sent: Thursday, March 11, 2004 10:41 AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Slow filer backups
> 
> 
> The sun machine is a E250.  LTO is LTO-1 in an ATL P7K 
> library.  We are'nt using compression and the average backup 
> time runs to more than double of what you specify.  
> 
> Thanks
> 
> - Krishnan
> 
> -----Original Message-----
> From: Howard Martin [mailto:howard.martin AT EDS DOT COM]
> Sent: 11 March 2004 15:10
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Slow filer backups
> 
> 
> On Thu, 11 Mar 2004 13:49:17 -0000, Krishnan, Ramamurthy 
> (Temp) <Ramamurthy.Krishnan AT KPMG.CO DOT UK> wrote:
> 
> >Hi all
> >
> >We have a set of NetApp 840 Filers that are connected to a ATL P7K 
> >through a Gigabit switch.  NetWorker 6.1.3 runs on Solaris 8.  The 
> >total backup size on an avg. is ~2TB a day.  The backups do 
> run but are 
> >too slow.  All the 12 LTO drives of the library won't exceed 12Mb/s 
> >speed.  The lowest being 90Kb/s.
> >
> >Is it a normal show?  Is there some way by which I can improve the 
> >transfer speed, so backups finish faster?  Any help is appreciated.
> >
> >TIA
> >
> >- Krishnan
> >
> which make of LTO?
> what hardware is the Legato server - number and type of HBA ? 
> what is your maximum total throughput ?
> 
> Legato GUI on solaris under reports speed by ~25% so you 
> might be getting streaming speeds although if you are you're 
> not getting much compression (you are using compression ?). 
> If you only have one gigabit link then the max throughput is 
> ~ 100MBytes/sec which only keep ~7 drives streaming. If the 
> Sun hardware is not Ultrasparc III at 900MHz plus it's 
> unlikely you would get 100MBytes out of a Gigabit network 
> anyway. How long does it take to backup 2 TB on this setup 
> best time to backup would be ~6 hours.
> 
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It is intended solely for the addressee.  Access to this
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