Sun server performance tuning -- need help 1

[NavinB]

Hi all,

I have a sun server 220R(sun4u) with dual processor(UltraSparc II- 450 MHz) and memory is 2GB.The operating system is Solaris 8.The server has two internal disks that are mirrored and one multipack disk structure.Inspite of having such a powerful system, the basic commands like copy(cp) and move(mv)take a lot of a time to copy largefiles(size greater than 1GB).Is there any way I can tune the system to improve its performance?

Any suggestion would be appreciated.

Thanks,
Navin

 

[drathbone]

Hi Navin,

It really depends where you're copying the files to and from. If they are being moved around disk on one controller, then I'm afraid it is going to take a while, even if it's the only process running. The speed of this sort of disk operation is almost completely dependant on the SCSI bus bandwidth available, the disks concerned, and if it's trying to read and write from the same SCSI bus.

Sorry, it's probably not what you wanted to hear, but let me know if I can be any more help.

Regards,

Darren Rathbone

 

[NavinB]

Hi,
I tried to copy from multi-pack disk(on controller 1) to the internal disk(on controller 0) and it took nearly 3 minutes to copy a .dbf file of size 1.9 Gb.But this is when I copy one file only.If I try to copy 3-4 files together using one command ,it takes much longer time to copy the same file.
Can u shed some light on this?
Secondly,the server has 2 SCSI ports(one on the motherboard and second one is on SCSI card).To which port, should the multi-pack be connected to improve performance?
Thanx in advance.

 

[drathbone]

Hi,

Your multipack should be connected onto your SCSI card to improve performance. The SCSI connector on the mainboard is actually the same one that runs your internal drives, even though they are often listed as c0 (internal disks) and c1 (external connector on mainboard).

Try moving the multipack onto your other SCSI card if it's not already.

Let me know how it goes.

Regards,
Darren

 

[NavinB]

Hi,
The multi-pack is connected to SCSI card only.So the end conclusion is that the speed will remain like this only.Anyway thanx for u'r replies.