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can we run "block level incr" backup for filesystem ?

Created: 04 Mar 2013 • Updated: 12 Apr 2013 | 10 comments
This issue has been solved. See solution.

We have to backup some database dumps from Unix and Windows systems. These are big images, the incr backup size is close to full. I am just wodering if we can use sanpshot client feature to run "block level incr" backup with regular UNIX/Win filessytem agents. If you have similar situations with good solutions. Please share with me.

thanks in advance.

Operating Systems:

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Marianne's picture

No such option, sorry.

Why not rather use NBU database agents?

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

Mark_Solutions's picture

Flashbackup / Flashbackup-Windows should sort of do this for you - but will backup the entire volume when it runs

Needs an Enterprise Client to use it

Authorised Symantec Consultant

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FelixZhou's picture

Really!? I thought the Flashbackup/Flashbackup-windows only work for VMWAre. does it also work for regular FS?  Will it also cover UNIX mount points?

thanks for your idea.

FelixZhou's picture

It is a Cache/EPIC hospital based DB. Our full backup is 1.4TB and incr is close to 1.2TB.   

Mark_Solutions's picture

Before VMWare was invented we had flashbackup - a few restrictions but I use it a lot for customers using Enterprise vault to backup the vault partitions (they contain millions of tiny files) so that it backups up at block level

From the snapshot client guide:

FlashBackup is a policy type that combines the speed of raw-partition backups
with the ability to restore individual files. The features that distinguish
FlashBackup from other raw-partition backups and standard file system backups
are these:
■ Increases backup performance as compared to standard file-ordered backup
methods. For example, a FlashBackup of a file system completes faster than
other types of backup in the following case:
■ the file system contains a large number of files
■ most of the file system blocks are allocated
■ Enables restore of individual files from raw-partition backups.
■ Backs up the following file systems: VxFS (Solaris, HP, Linux, AIX), ufs (Solaris),
Online JFS (HP), and NTFS (Windows).
See “FlashBackup restrictions” on page 88.
■ Supports multiple data streams, to further increase the performance of
raw-partition backups when multiple devices are in the Backup Selections
list.
4 Chapter
■ For a complete list of supported platforms, snapshot methods, and data types,
see the NetBackup 7.x Snapshot Client Compatibility document:
http://www.symantec.com/docs/TECH126901

Lots of restrictions to so check the NetBackup_AdminGuide_SnapshotClient.pdf

Authorised Symantec Consultant

Don't forget to "Mark as Solution" if someones advice has solved your issue - and please bring back the Thumbs Up!!.

SOLUTION
Marianne's picture

Supported OS and Volume Manager/Filesystem combinations for FlashBackup are listed in Snapshot Client compatibility list.
Use 'Handy NBU links' to locate Master Compatibility list.

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

FelixZhou's picture

Netbackup flashbackup only supports VxFS on AIX, but we are using JFS2. Looks we still have problem.

Marianne's picture

Next possible solution:

Consider dedupe solution that supports Accellerator.
NBU Media server dedupe on NBU 7.5 supports client-side dedupe with Accellerator.

A couple of blogs about Accellerator:

https://www-secure.symantec.com/connect/blogs/plan-better-backup-break-backup-window-netbackup-accelerator 

https://www-secure.symantec.com/connect/blogs/frequently-asked-questions-netbackup-accelerator 

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

FelixZhou's picture

we never tried any client side deduplication. Is it based on file level or block level?  will we get decent deduplication ratio?

thanks,

Marianne's picture

Block level - as per the first blog in my previous post.

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