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BE12.5 small files delaying backup

Created: 24 Jul 2013 | 6 comments
SandraM's picture

hi to all

I have a scenario where i need to do a full backup each night of a server to tape (LTO4), the server runs a database which has thousands of tiny files associated to it, which slows the backup down massively, and is taking nearly 24 hours to run. i have optimised the backup as suggested in other posts, but need a proper solution.

Would running two jobs side by side backing up the database files to disc, then backing up the backup to disc- to tape work? if so how would this impact recovery?

does anyone have any clever ideas other than incremental backups?



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C-Ray's picture

How did you setup your policy? Did you just setup an All_Local_Drives policy? or did you break up the drives/file directories?

Something like this...




Can you turn on multistreaming? That will help as well.

teiva-boy's picture

C-Ray you're speaking NetBackup nomenclature and features.  BackupExec has NO multi-streaming features, it's all serial.  It's been this way from the begining of time.

Backing up to disk then cloning off to tape is usally an improvement.  But only a test can verify that.  

LTO4 MUST be able to receive data at 24MB/s minimum, in BackupExec speak, greater than 1500MB/min.  If you can't reach those speeds, you have to write to disk first, then duplicate to tape.

There is an online portal, save yourself the long hold times. Create ticket online, then call in with ticket # in hand :-) "We backup data to restore, we don't backup data just to back it up."

C-Ray's picture

Figured that was the case, thought I would ask anyways. :)

lmosla's picture

Make sure that the database files are excluded from any virus scan. What are the remote and media server versions?

pkh's picture

With a lot of small files, you are unlikely to get a lot of speed with BE.  You might want to take a look at SSR (Symantec System Recovery) which can do image-based backups.  It would be a lot faster than using BE.

CraigV's picture

...the other option is to try backing up the small files to disk and then duplicating to tape. Less stop/start on the tape drive. When duplicating larger files it would run at a faster speed.


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