Slow backup problem.

on networker side it is paralelism
but the speed depends on the server hw, tape device connectivity (san, scsi) network, number of files backed up etc.
start with the performance monitor on the server side and check if the speed is higher/lower when runing less/more backups at the same time.

Has it always been on the slow side?
Is Drive connected ditectly on the NW server?
Check LAN traffic.
Check CPU usage on server
Increase Parallelism on NW to enable more savesets to be backed up simultaneously.

Hello HabibG2,
Thanks for your response.
1). Yes. it's always slow.
2). Yes. Drive is connected to the BS. We tried Backup into Disk instead of tape but no improvement.
3) Network utilization is 20-60%. (most of the time less than 50)
4) Less than 20%.
5) Paralleslism is 8


With Regards
Hemant.

Hello PeterBen,
Thanks for your response.
1) We have SAN tape device and LTO 2 tapes (Speed: 24/48 MB/Sec)
2) The performance is same for 12 Client backup and backup server backup itself.
3) What to check in the performance monitor.

In the Backup Server only Networker software is installed.
OS details:
Microsoft Windows Server 2003
2:00 GHz processor
1 GB RAM



Thanks
With Regards
Hemant.

Check the NIC settings of the backupserver & clients. It should be set to full duplex /auto neg off.

Hi,


While you are checking the LAN settings, it is worth ensuring that any firewalls between the LAN clients and the NetWorker server are disabled.

Secondly, do you also get these slow performance figures if you backup ONLY the NetWorker server ?

Icrease in parallelism would help only if there are enough no. of save sets to backup. Generally if you have only 1-2 save sets, backups would be slow but not as slow as you are saying. If these are on the network i.e. LAN based backups, set your NIC cards to Full Duplex and network speed to a fixed value. Using Auto options does not help. Check the same on the switch ports also. What OS are you backing up on the clients and what is the backup server OS? Also, what are the save sets...are these file system backups OR any online backups?

I would think the NIC on the backup server is something you need to check the settings of. However you do also state that backups from the backup server are also slow. You could try using the bigasm directive to test throughput - do a search on Powerlink for the process; its very straightforward.