Thanks Matthew.
I just want to confirm that you are saying that Networker itself creates a 
snapshot, not to be confused with the snapshots that the Netapp filer is 
creating on a schedule.

Troy Kutil
Phone 262-783-8289
Fax 262-373-5689
Milwaukee Electric Tool



Matthew Huff <mhuff AT OX DOT COM> 
Sent by: EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
02/28/2008 11:31 AM
Please respond to
EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>; Please respond 
to
Matthew Huff <mhuff AT OX DOT COM>


To
NETWORKER AT LISTSERV.TEMPLE DOT EDU
cc

Subject
Re: [Networker] Long NDMP Backups






It depends on your backup window. For example, we prefer the full backups 
to take less than 8 hours, that way if we have to do Saturday maintenance, 
we aren't waiting on the backups to finish. Also, the longer the backups 
take, the harder it is to redo if there is an error during the backups.

As far as it is using snapshots, the one thing to be aware of is that 
because it creates a snapshot if someone deletes a bunch of data, the 
snapshot will become large (in order to capture the previous state). If 
someone is deleting disk space because the filer is near full and the 
backups are still running, the delete won't free up any space. Remember 
that snapshots created for backups aren't limited by the snapshot 
reservation % that you set up.


----
Matthew Huff       | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
www.otaotr.com     | Phone: 914-460-4039
aim: matthewbhuff  | Fax:   914-460-4139
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of tkutil
Sent: Thursday, February 28, 2008 12:05 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Long NDMP Backups

Thanks to every one for all of your great suggestions. Our first step is 
to team the network connection on the Networker server and the switch to 
increase throughput as well as implement jumbo frames. After that we'll 
determine what other suggestions to implement. 

One thing that I'm curious about that may make this whole subject a moot 
point is how Networker handles NDMP. I can't remember where I heard this, 
most likely from this forum, but does Networker NDMP create a snapshot of 
the volume and then backup that snapshot? I see that in the logs and if 
that is so, do I care how long the backup takes if it is truly a snapshot 
and not the live data?

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