which is the maxim disk i/o per sec in HPUX?

[Victor Burguillos_4]

which is the maxim disk i/o per sec in HPUX?

[A. Clay Stephenson]

How can that question possibly be answered? It depends much more upon the hardware than the OS.

[Victor Burguillos_4]

Ok...Basically, I have a Superdome partition connected to EMC, I need know which is the normal i/o per second in this configuration?

[Jannik]

It depends on the server. On the new SD whith the new chipset you have (The small one):

48 slots with:
8 slots @ 2,133 MB/s,
24 slots @ 1,066 MB/s,
16 slots @ 533 MB/s

and the over all:
Cell controller to I/O subsystem bandwidth (peak) 11,5 GB/s.

The keystone give this on its expancion slot:
Expansion slots PCI-X slots available: 16 PCI-X 266 hot-plug I/O card slots available
Optional Server Expansion Unit 2 (SEU-2): 16 additional PCI-X 266 hot-plug
I/O card slots I/O bandwidth: 46 GB/s Peak (including SEU-2)

You can read it from the main HP site:
http://welcome.hp.com/country/us/en/prodserv/servers.html

[Jannik]

Ok you have a EMC...
You ask for the teori:

If you have 2Gbit fiber would give you 256 MBytes/s and if you use tools like powerpath and more than one path you would be able to run many times that.

On the EMC system you have to calculate. Q-target lun that is 8 on HPUX and in solaris 256 with a sd_max_throttle and min. You have to calculate for all the servers connected to that channel. I would think that EMC q-target max is 1024 or 2048. The target can be LUN or channel.

This is the math:
P = number of hosts
q = q-depth per LUN
L = Number of luns configured
Service-Q = max q-depth
Q = q-depth per HBA

Service-Q => P * q * L
OR
Service-Q => p * Q

(This is from Rajiv K Grover document: Calculating IO loading for array devices)

Then if you have a smal amount of servers on the channels and is below the recommended Service-Q you can start to calculate the maximum IO to disk.

This is all somethings that your SAN people should know about.