4 Beryllium

Re: Isilon storage performance issue

Have you seen this?  I'd recommend to have look:

Ask the Expert: Isilon Performance Analysis

Maybe a few things can be checked in advance (before tracking things down to disk level):

- double check that no background jobs are running and stealing CPU or IOPS

- with four clients, is the network traffic well balanced across the four Isilon nodes?

- are the actual NFS read/write sizes large enough for 128K? (server and client negotiate a match within their limits.)

- is the random access pattern really in effect?

- for 128K reads, one could also try the concurrency pattern...

-- Peter