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snapshot

Created: 01 Jan 2013 • Updated: 04 Jan 2013 | 12 comments
This issue has been solved. See solution.

Hi ALL,

I just wanna know in windows Open file backup,when my backup runs,snapshot is created of entire drive or only changed files on that drive ?

Please Anyone  tell me in one line  for this querry.,

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Manjunath Rajanna's picture

Snapshots are a point-in-time view of a source volume. NetBackup uses snapshots to access busy or active files during a backup job. Without a snapshot provider, active files are not accessible for backup.

Marianne's picture

Your snapshot questions have been answered many times in your other posts:

https://www-secure.symantec.com/connect/forums/snapshot-0 

https://www-secure.symantec.com/connect/forums/snapshot-1 

https://www-secure.symantec.com/connect/forums/netbackup-25 

https://www-secure.symantec.com/connect/forums/156-error-0 

(There are more, but carefully reading through all of the above posts should help to refresh your memory.)

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

nike_new's picture

@Manjunath:Whole drive snapshot is created?

I mean If I have 30 GB of D drive,Then Snapshot of 30 Gb (D') is also created during backup?

Marianne's picture

Another user id that I believe this OP knows very well! 

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Manjunath Rajanna's picture

Hi,

If the drive is 30GB then it will take snapshot of entire drive and its backs up later it will discard and continues to take another drive backup if more than one drive if you specified.

nike_new's picture

 

 

@Manjunath : so space must be 60 GB on D drive?

Manjunath Rajanna's picture

Hi, Always sufficient space should be there for snapshot backup.

snapshot and backup will happen sequentially, once backup is done snapshot will be deleted.

nike_new's picture

 

@Manjunath:Whole drive size  snapshot is created?

I mean If I have 30 GB of D drive,Then Snapshot of 30 Gb (D') is also created during backup?

 

That means 60 GB  should be the space of D drive

mph999's picture

"I mean If I have 30 GB of D drive,Then Snapshot of 30 Gb (D') is also created during backup?"

It depends how much data changes.

Snapshots are not backups, if I have data on my disk and make a copy-on-write snapshot, it is 'instant, and no extra space is required, until I make a change to the data.

If you google for how snapshots work you will find some good explanations.

Martin

 

 

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Manjunath Rajanna's picture

it is the thumb rule to have 10% of the original size of the volume not the double the size of the drive/volume.,

SOLUTION