The vsp file is what is used to keep track of changes to open files
while you are doing backups.

If you don't use the vsp you cannot backup open files.  So the setting
of the vsp (or now vss for 2003 and 2008 servers) is set to either fail
if it cannot get the file, or give up on the open file and continue on.

You will see this on your windows servers - there will be a dir that has
vsp in its name.

Now if the backup was running and it failed it might leave the vsp file
behind and use up your disk space.

If your virus scanner is scanning the file when the job finishes it
might not be able to remove the file and it gets left behind.

So you need to exclude that file with your virus scanning.

http://seer.entsupport.symantec.com/docs/314754.htm

if you cannot get the vsp file to remove because it is busy you might
have to use the pid killer to get it to release the file.

 

 

From: veritas-bu-boun...@mailman.eng.auburn.edu
[mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Jimenez,
Daniel
Sent: Friday, March 12, 2010 7:21 PM
To: veritas-bu@mailman.eng.auburn.edu
Subject: [Veritas-bu] VSP Clarification

 

Hey guys

 

I was reading the VSP overview for Netbackup 6.5 and was a little
confused on the virtual drive creation and the VSP cache file creation.
Where is the virtual drive created? And what exactly is inside the VSP
cache file. I read through the documentation but still unclear on these
things so anyone that can put this piece of the documentation into
layman's terms I would appreciate it, thanks.  

 

 

 

VSP overview 

NetBackup uses VSP to back up open and active files on Windows 2000,
Windows XP, and Windows Server 2003 (32- and 64-bit) clients. For VSP to
back up open and active files, VSP first captures a snapshot of each
volume to be backed up. 

 

A virtual drive is created that represents a static copy of the volume
at a point-in-time. A corresponding VSP cache file is also created.
NetBackup backs up files using the virtual drive instead of the actual
drive. For each volume snapshot, a VSP cache file is created to maintain
the integrity of the snapshot. The cache file stores the original data
that reflects the changes that occurred during the backup. The cache
file is created along with the volume snapshot.

 

Daniel Jimenez

Data Protection

 

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