Yes, you need a Linux media server  to read the file system. 



[] On Behalf Of Simon Weaver
Sent: Thursday, April 12, 2012 11:36 AM
To: stefanos; Mark Phillips;
Subject: Re: [Veritas-bu] Advice & Help - Linux Server 14TB



You mentioned Snapshots earlier and mounting to another Media Server, but I
take it I would have to implement a Media Server of Linux in order to do




From:  <> on behalf of stefanos
Sent: Thu 12/04/2012 08:38
To: 'Mark Phillips';  <>; Simon Weaver
Cc:  <>;
Subject: Re: [Veritas-bu] Advice & Help - Linux Server 14TB

I agree that synthetic backups are good, but only if you run file backups. 

If the system has an oracle, the synthetic backups are useless.




[] On Behalf Of Mark
Sent: Thursday, April 12, 2012 3:56 AM
To:; Simon Weaver
Subject: Re: [Veritas-bu] Advice & Help - Linux Server 14TB


I agree. We use synthetic fulls quite a bit.


They work really well for large filesystems that have relatively small
incremental backups.

If you're going to tape you'll need at least 2 free tape drives for the
duration of the synthetic full backup, one for the last full backup and the
other for the one you're constructing.

Also it's best if you're able to send incremental backups to staging disk
and they remain on the staging disk when the synthetic full is being
constructed, it saves on tape loading and positioning time.

If the incremental backups are going to tape avoid multiplexing them, it'll
slow things down.

Also if you're going to tape when doing the first conventional full backup
don't multiplex it - this will make doing the first synthetic full backup




[] On Behalf Of
Sent: Thursday, 12 April 2012 9:57 AM
To: Simon Weaver
Subject: Re: [Veritas-bu] Advice & Help - Linux Server 14TB


I would look at synthetics ... not quite as large as you, but I backup
around 8TBs on one linux (RHEL 4) server over the weekend (every weekend)
and it completes in well under 24 hours.  (About 16-20 hours from memory) 

The very first backup has to be a full, but once that is out of the way, you
should be able to do a full synthetic every weekend in well under 48 hours
(I'm going on what I have above so is just a guess - you may be much faster
than my infrastructure as its nothing flash ... though it is completely

I should add that I've been using synthetics on this particular server for
around 4.5 years now, and they are reliable and fast - unless you have to
"re-seed" the synthetic with an initial full backup; I have had a few go bad
such that I have had to re-seed the backup, but that's been rare and only
happened 2-3 times in all that time.  HIGHLY recommended for large backups. 


From:        "Simon Weaver" <> 
To:        <>, 
Date:        11/04/2012 09:16 PM 
Subject:        [Veritas-bu] Advice & Help - Linux Server 14TB 
Sent by: 


I am hoping you can help.... 
Im not too familiar with Linux, but we have a RedHat Box, that is a VM Guest
on an ESX Host, that has RDM's totalling 14TB 
The backups are done over the LAN - Painfully slow as you can imagine. 
Im wondering what options I have in terms of trying to improve performance
for this client. So far its taking close to 3 days to run. 
It is on a 1GB Network, as I understand. But does anyone have any
Thanks, Si_______________________________________________
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