You can't take ndmp backups between different systems? Any idea why?
AFAIC, and I haven't tested this in any way, an ndmp backup is a standard way
of backing up files. Getting back those files should follow the same standard.
As such, the only problem that I'd maybe expect to see with the restore of
these files would be with ownership and file permissions, and not with the data
- the same problem that you'd get with tar, actually. Or is it an "underlying
filesystem" thing?
Okay, I know this isn't specifically a NetWorker question, but I'd just be
interested to have this clarified. It's certainly something which we may have
to do as backup admins at some point...
Cheers,
Stuart.
________________________________
From: EMC NetWorker discussion on behalf of Curtis Preston
Sent: Fri 08-Dec-06 07:17
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] NDMP - tar versus dump
I'd prefer tar. It deals with active filesystems better than dump. And
it's more portable.
Say you ever change your mind and decide to move to NetApp, Onstor, or
Agami. Your NDMP backups won't work on any of them, so you'll have to
do legacy restores using a Unix box. If the backup format is tar,
you'll be able to use just about anything that smells of Linux, possibly
even Windows. If it's in dump format, your choices are much more
limited.
---
W. Curtis Preston, Author of Backup & Recovery and Using SANs and NAS
VP Data Protection
GlassHouse Technologies
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Darren Dunham
Sent: Thursday, December 07, 2006 12:44 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] NDMP - tar versus dump
> We are setting up NDMP backup from our celerra (DDS attached LTO3
drives,
> 2gbit fibre channel) and have the option of either dump or tar. Both
seem
> to work, I don't see major differences in the time to backup between
the
> two. I'm seeing throughput averaging about 35MB/sec for both methods
on a
> single datamover.
>
> Any reason to go with one method over the other?
> Any tricks to improving the throughput?
Does DAR work with either or both? If all the data is in both, and the
recovery setup can find the data, I don't know that I would care about
the format.
--
Darren Dunham ddunham AT taos DOT com
Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
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