Re: [Networker] Slow NDMP restores

Guess, you cannot stream multiple sessions to NDMP devices.  This backup
we are trying to restore was the only session running on the tape at
that time.

Rgds, Ram.

-----Original Message-----
From: dmingia AT guilford DOT edu [mailto:dmingia AT guilford DOT edu] 
Sent: 23 June 2006 15:49
To: Legato NetWorker discussion; Krishnan, Ramamurthy
Subject: Re: [Networker] Slow NDMP restores





Are you using parrallelisim?
If so you are writing to the tape in multiple streams to make backups go
quickly.  Thus, to restore the tape has to "pick through" the data on it
and therefore restores take a long time.

Or so i am told. :)

David Mingia
Networks and Server Specialist
dmingia AT guilford DOT edu
Guilford College
5800 W. Friendly Ave.
Greensboro, NC  27410
336-316-2424




 

             "Krishnan,

             Ramamurthy"

             <Ramamurthy.Krish
To 
             nan AT KPMG.CO DOT UK>           NETWORKER AT LISTSERV.TEMPLE DOT 
EDU

             Sent by: Legato
cc 
             NetWorker

             discussion
Subject 
             <NETWORKER@LISTSE         [Networker] Slow NDMP restores

             RV.TEMPLE.EDU>

 

 

             06/23/2006 10:41

             AM

 

 

             Please respond to

             Legato NetWorker

                discussion

             <NETWORKER@LISTSE

              RV.TEMPLE.EDU>;

             Please respond to

                "Krishnan,

                Ramamurthy"

             <Ramamurthy.Krish

              nan AT KPMG.CO DOT UK>

 

 





Hello

We have a fabric connected library backing up Network Appliance filers
using NDMP.  We are getting goog backup speeds (up to 55Mb/sec) to the
NDMP configured LTO 2 drives.  But restores are extremely slow - at
approximately 30 minutes per gigabyte.  Has anyone seen this behaviour
before?  If so, please can you let me know?  The setup details as below:

NetWorker Server - Solaris 2.9
NetWorker 7.2.2
LTO 2 tape drives in a Quantum PX720 library Brocade Silkworm 3850 FC
switch NetApp F825 running OnTap 6.5.1 R1P5

Thanks in advance.

Rgds, Ram.


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