Thanks again, Paul,

  To answer some of your questions:

The NICs are foced.  There ARE two of them.  2 GB nics teamed together
(before you ask, yes, I checked, the drivers are the latest)

My backup selection list CURRENTLY looks like this: D:\, E:\

The E drive is where the majority of the data sits: about 700 GB.  The
D:\ drive is much smaller, maybe 40-50 GB.  They are separate physical
drives.  The E drive lives on a SAN, where it is a RAID 5 configured
volume.

The tape drives are IBM Ultrium LTO drives, fiber attached to the
NetBackup Master Server.  I have 8 of these in a Sun Branded L180.

I have a hard time imagining that the slow down is in the client's SAN
connection to the target drives, or the Master Server's SAN connection
to the Tape Drives.

Thanks in advance for the help.

--Errin 



> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu 
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of 
> Paul Keating
> Sent: Tuesday, May 03, 2005 10:12 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] Scratch Pool Usage
> 
> 
> 
> > 
> > Thanks for the response, Paul.
> 
> No prob
> 
> >   I have a policy (MS-Windows-NT) that takes Diff-Inc backups
> > every day
> > except Sunday, which is when it takes a full.  This produces 
> > one job (I
> > was under the mistaken impression that Multiplexing allowed 
> one job to
> > run to multiple tapes.  Thanks for correcting me). 
> 
> MultiPLEXing allows multiple jobs from one or more machines 
> to run to ONE tape. Primarily for fast tape drives and slow clients.
> 
> MultiSTREAMing allows multiple jobs from one machine to run 
> to multiple tapes. Primarily for fast clients and slow tapes
> 
> > That job has been
> > running between 19-21 hours(!!).  I need to shorten that run
> > time.  This
> > is a Windows File Server.  The total backup size is about 
> > 750GB.  Right
> > now the policy is configured as follows:
> > 
> >   Policy stuff:
> >   Limit Jobs per Policy = 4
> >   Allow multiple data streams = Unchecked
> 
> This is ONE machine?
> You want multiple backups jobs from one machine to go to 
> multiple drives, correct?
> Eg:
> C:\ to drive 1
> D:\ to drive 2
> Etc.
> 
> Here is your prob. You need to check "Allow multiple data streams"
> 
> And your "Backup Selections" list should look something like: 
> NEW_STREAM C:\ NEW_STREAM D:\ NEW_STREAM S:\
> 
> Etc......
> If your drives are not different physical disks, however, 
> this may actually hurt performance. You only want to pull 
> maximum of 1 stream per physical disk.
> 
> > 
> >   Schedule Stuff:
> >   Type = Full Backup
> >   Media Multiplexing = 4
> 
> Another prob. Set multiplexing to 1. (setting multiplex to 4 
> allows 4 backup jobs to go to one tape.)
> 
> > 
> >   
> >   Any suggestions on shorting the backup time?  Any more info I can 
> > provide?
> 
> 
> What type of tape drive? 
> Gig or Fast Ethernet?
> Are NICs forced or set to auto Negotiate?
> 
> That's a lot of data, if you're not prepared for it...
> I'm currently backing up approximately that much data, split 
> between 2 win2k3 clusters. Each cluster has a RAID5 diskset 
> with about 1TB of space available. Each machine has a GigE 
> NIC dedicated to backups. (separate VLAN from production 
> networrk traffic) I'm pulling 2 streams (different 
> driveletters) from each RAID5 diskset, (only due to logical 
> naming) then multiplexing the two streams onto a single LTO2 
> tapedrive, getting about 50 Mbytes/sec per tape.
> 
> We had some significant issue getting these machines up to 
> speed.......Antivirus was a HUGE speed killer.
> 
> Paul
> 
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