I have seen speeds of 30 MB/s with NDMP where the NAS is a Net Apps R200
NearStore and the drive is LTO-2.  A lot depends on the type of data
being written and whether or not you can keep the drive streaming.  An
LTO-2 drive is capable of supporting 40 MB/s write speeds if you can
sustain the data stream to it.

Regards,

Paul Esson 
Senior Consultant 
Redstor Limited 

Direct:            +44 (0) 1224 595381 
Mobile:           +44 (0) 7766 906514 
E-Mail:           paul.esson AT redstor DOT com 
Web:               www.redstor.com 
REDSTOR LIMITED 
Torridon House 
73-75 Regent Quay 
Aberdeen 
UK 
AB11 5AR 
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-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of Rob Haig
Sent: 07 March 2005 16:18
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] NDMP speeds (with a centera if anyone has one)

We're looking at buying some Centera frames from EMC.  Our volume needs
make replication cost prohibitive, (both in hardware and offsite hosting
space) so we're looking at an offsite library that could do (almost
constant) NDMP backups of the data we'll be loading into the Centera.
The sales guy we're working is pushing replication (hmmm....) and
doesn't think that an NDMP client can push enough data for us (we'd need
to sustain about 40MB/s to keep up with our forecast needs).  

 

Does anyone have experience with how much data an NDMP client can push??
And has anyone done so with a Centera?

 

Thx

-- 

Rob



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3/7/2005 10:18 AM

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