Improve Backup Speed of Arcserve2000 SP3

[Proximus]

Hi,

a few days ago we've upgraded Arcserve 6.61 to Arcserve 2000 SP3 after a fresh Win2K-Installation.

Backup with Arcserve 6.61 always varied between 80 and 160 MB/min., now we have a strange symptom: When we start 6 jobs at the same time (Our library has got 6 drives), every job reaches at most 16-19 MB/min., if only one job is started, it reaches approximate 100 MB/min.

It seems as if it is no longer possible to top the 100 MB/min., the more jobs and drives are in use the less the speed of each. Is there any possibility of getting the old data throughput and performance?

I would be very grateful for any hint which could help me to solve this issue.

Thanx in advance!

 

[SpeedTriple]

Hi Proximus,

I've no idea whether this works under ArcServe2000, but somewhere else in this forum is a mention of the following tuning tip:

http://support.cai.com/techbases/asnt/16005.html

Basically, if it works, it allows you to assign more memory to the backup-job, resulting in better performance.
The simptoms and the improvements documented there seem to fit your problem.

Let us know if it helps!

 

[toerag]

If you happen to be using the Arcserve 2000 Agent, remove it. I recommend using the 6.61 Agent even if CA reckon it doesn't work with Arcserve 2000. I noticed when I ran the 6.61 Client Agent connecting to Acrserve 2000 (V7) I had no issues. As soon as I installed the 2000 Agent, Including SP2 for Arcserve 2000 Server and SP2 Client Agent update all went to mustard. File Pattern Filter failed to work (*.tmp), Compression was not working and above all performance went from a respectable 300-400 mb/min to a shocking 70 mb/min. Well as soon as I noticed that my 17 NT4.0 Server backup (330 GB full backup) took 23hrs through the 6.61 Agent and an alarming 4 Days (Finally gave up after 10 servers)through the 2000 agent. I removed all the 2000 client agents and went back to the 6.61 agent and finally got some worth while sleep and got to keep my job.

 

[Proximus]

Thanx a lot for your answers. Finally I've approximately managed to solve the problem.

We use the Adaptec 29160 SCSI Adapter for our Sony-Drives - Since we have upgraded it was plugged into a 64-Bit-slot as well as our HBA PCI Fibre Channel Controller. At last we used a 32-Bit-slot and a shorter SCSI-cable what actually improved the speed a lot.

In a nutshell: It seems as if the SCSI-configuration respectively -hardware caused the bottleneck.