Help with SC10 connection

[Peter Mattei]

ServiceGuard has almost no impact. It just takes some monitoring and heartbeat cycles of your server.

In a split Bus environment you isolate SCSI and therefore the IOs, so the servers cannot impact each other.
Anyway, in a "normal" environment you will hardly be able to notice a difference.
The more important thing is the number of disks in a volume group!

cheers
Peter

[Pocius Arturas]

Can you explain your last sentence?

[Peter Mattei]

Well, a single disk with 10k rpm can do 100 to 150 read-IO operations per second.
If you let's say have 20 disks, mirrored with Mirror-UX and build a volume group and spread your accesses over all disks you will have 10*100 to 150 = 1000 to 1500 read-IOs max. you can expect.
Doubling the number of disks will theoretically double the IOs you can achieve (also depends on connections, saturation of SCSI bus etc)


Peter

[Pocius Arturas]

Thank you for the help.

Arturas