Re: Measuring Filer Performance

Once any one filer resource is nearly consumed, performance will be affected.

My favorite command is "sysstat -u 1", and we see slowdowns when any one or more of the conditions below are occurring continuously (values are approximate; filer is a 3050c):

- CPU: above 90%.

- Net kB/s out: above 75% of the agreggate wire speed of the filer's network connections. (We are read-mostly.)

- Disk kB/s write: more than 10 seconds at a time over 10,000kB/s.

- Cache hit: anything less than 95%.

- Disk util: above 40-50%.

Rohit wrote:

Hi Folks

I had some open questions and i hope you'll help me answer them based on your experience.

1. If you just had a single metric to determine filer performance what

would it be ? Would it be CPU usage, throughput, latency, IOPS..or anything else ?

2. At your place, what metrics do you use to determine if a filer is

still good enough not to worry about ?