backup speed 1

[rongill]

Here is my setup.

Backup VM (Bladecenter ESX) has all backup data on a SAN (Tier 3) storage. This as well as our backup server (Solaris) is connected to silkworm 4100 FC switches.

The tape library (Storagetek sl500) is also connected to the switch via FC. It contains 3 LTO3 ultrium 3 tape drives.

I am getting speeds of around 500MB/minute with compression enabled.

Shouldn't it be getting alot higher speeds?

 

[Stumpr]

How to tell if you are backing up as fast as you can.
answer - you don't trip!

Yes you should get better speed. Where/how are you doing the compression?

Here is a good reference
Backup Planning and Performance Tuning Guide for UNIX, Windows, and Linux

http://support.veritas.com/docs/281842

Bob Stump
VERITAS - "Ain't it the truth?"

 

[rongill]

compression is enabled in netbackup under the policy attributes page.

 

[Stumpr]

That will definitely slow down the backup. How much memory are you using for the compression process?



Bob Stump
VERITAS - "Ain't it the truth?"

 

[rongill]

Netbackup is on a sun v245 server w/2G MEMORY

 

[rongill]

im not too familiar with solaris so firmware/driver updates haven't been done.

 

[Stumpr]

Remove the compression from the policy and let the tape drive do hardware compression.

see page 10 concerning compression

http://eval.veritas.com/downloads/van/4019.pdf

Bob Stump
VERITAS - "Ain't it the truth?"

 

[rongill]

thx ill that. To enable HW compression I didn't see this option on the software for the library. Do you know if it's something physical I have to change on the library to enable?

 

[rongill]

i disabled the software compression in netbackup. The throughput has decreased to 420MB/MIN.

FTY - The switch is not zoned.

 

[Frbutler]

If your VMWare box is not a media agent then you are probably going over ethernet to your NBU media agent regardless of the fiber channel zoning.

 

[rongill]

OK. I am running from a vm client to the solaris to the tape drive. Could this bottleneck be causing it. Do I need to increase buffer sizes in solaris?

 

[Stumpr]

This document will help you locate the bottle neck, troubleshoot throughput and will get you the throughput that you need.
Backup Planning and Performance Tuning Guide for UNIX, Windows, and Linux

http://support.veritas.com/docs/281842

If you have any questions from this document then please post them. Enjoy!



Bob Stump
VERITAS - "Ain't it the truth?"