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MSL6030 low performance

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Davide Depaoli_3
Valued Contributor

MSL6030 low performance

Hi,
My customer has installed MSL6030 (scsi, 1 drive) and DataProtector 5.1.
Him reclaim that the library performances are 3 times slow (10 MB/s instead of 30 MB/s) than the normal.
The backup environment is:
3 Win2000 server (fileserver,CAD)
2 Unix server
total amount of backed up files: about 3 Milions.

The library was installed with factory defaults, none was changed.

Someone has any idea or any test ?
thanks to all
regards Davide
6 REPLIES
David Ruska
Honored Contributor

Re: MSL6030 low performance

Install HP Library & Tape Tools (www.hp.com/support/tapetools). You can run this on your windows and HP-UX servers.

There are two performance test tools.

Device perf - will test the write speed of the tape drives.

Sys perf - will test the rate that data can be pulled from your disks.
The journey IS the reward.
Leif Halvarsson_2
Honored Contributor
Solution

Re: MSL6030 low performance

Hi,
I am not surprised, I guess the limitations is in the disksystems and/or the fileservers and/or the network. It is very hard to get max. performance out of a Ultrium 2 drive if you back up millions of rather small files. You need exstremly fast disk systems, fileservers and GBit network. Or, you have to do disk image backups.
Davide Depaoli_3
Valued Contributor

Re: MSL6030 low performance

Hi, the customer has done some test:
- with T&LL tool, the library performances
are near to declared (90 / 100 GB/h)
- defragmenting the disks of backup clients
backup time is decreased from 9 to 5 hours
- backing up about 1000 files with dimension
of 10 MB or more, backup speed was about
60 GB/h
- increasing the DataProtector processes from 4 to 5, general performances are a little bit improved.
- increasing DataProtector processes to 32, DP has crashed

Any idea about these results ?
thanks
regards Davide
Leif Halvarsson_2
Honored Contributor

Re: MSL6030 low performance

Hi,
I still suspect the limitations is with the disk/filesystem , not with DP or the tape library.

What kind of disk system are you using (SAN, local, hardware RAID, model) ?

Do you backup the clients via a SAN or LAN ?

Was the 60 GB/h a Windows or Unix client, is there any differences in performance WIndows/Unix ?
Davide Depaoli_3
Valued Contributor

Re: MSL6030 low performance

Using local server's hard disks. I suppose there is a RAID 5 on these disks, but I'm not sure.
Clients are backed up via 1Gbps LAN.
60 GB/h are obtained with Windows clients.
There are no relevant differences between Windows and Unix systems.
Davide Depaoli_3
Valued Contributor

Re: MSL6030 low performance

.