Re: [Networker] Slow filer backups
2004-03-11 11:19:20
With the NDMP backups, the filers are directly backing up to the tape
drives over the switch. The SUN isn't involved.
----
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: Howard Martin [mailto:howard.martin AT EDS DOT COM]
> Sent: Thursday, March 11, 2004 11:01 AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Slow filer backups
>
>
> On Thu, 11 Mar 2004 15:40:43 -0000, Krishnan, Ramamurthy
> (Temp) <Ramamurthy.Krishnan AT KPMG.CO DOT UK> wrote:
>
> >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
> >
> Ah the E250 will only handle about 50MBytes/sec on Gigabit
> ethernet (varies slightly depending on the processor speed,
> so that is probably your bottle neck, if you could try the
> same setup on a 280R/240R/V480/V880 you might double your
> throughput. You might get some improvement through using
> client side compression (directive with compressasm) but it
> might strain your filers. If you want to check my diagnosis
> then run bigasm tests on the backup server and then on the
> filers which will show more clearly (but not
> exactly) where the botlenack is - see previous posts on this
> list for using bigasm. The other problem with an E250 is that
> is doesn't have many slots you must be careful that the i/o
> rate of the aggregate of the drives on a single SCSI bus
> doesn't greatly exceed the i/o rate of the bus. Again the use
> of bigasm would indicate what the maximum i/o rate to your
> drives would be.
>
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Re: [Networker] Slow filer backups, Davina Treiber
Re: [Networker] Slow filer backups, Howard Martin
Re: [Networker] Slow filer backups, Krishnan, Ramamurthy (Temp)
Re: [Networker] Slow filer backups, Howard Martin
Re: [Networker] Slow filer backups, Matthew Huff
Re: [Networker] Slow filer backups,
Matthew Huff <=
Re: [Networker] Slow filer backups, Krishnan, Ramamurthy (Temp)
Re: [Networker] Slow filer backups, Howard Martin
Re: [Networker] Slow filer backups, Itzik Meirson
Re: [Networker] Slow filer backups, Matthew Huff
Re: [Networker] Slow filer backups, Krishnan, Ramamurthy (Temp)
Re: [Networker] Slow filer backups, Krishnan, Ramamurthy (Temp)
Re: [Networker] Slow filer backups, Itzik Meirson
Re: [Networker] Slow filer backups, Krishnan, Ramamurthy (Temp)
Re: [Networker] Slow filer backups, Matthew Huff
Re: [Networker] Slow filer backups, Jack Lyons
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