Latency is primary for what most of what my filers are doing. Usually watched via nfs_hist (being sure to -z the stats), or using stats all wrapped up in a shell script.
rsh $FILER 'priv set -q diag ; stats show -i $INTER -n $SAMPLES volume:$VOL:avg_latency volume:$VOL:total_ops volume:$VOL:read_latency volume:$VOL:read_ops volume:$VOL:write_latency volume:$VOL:write_ops volume:$VOL:other_latency volume:$VOL:other_ops volume:$VOL:nfs_read_latency volume:$VOL:nfs_read_ops volume:$VOL:nfs_write_latency volume:$VOL:nfs_write_ops volume:$VOL:nfs_other_latency volume:$VOL:nfs_other_ops' nfsv3:nfs:nfsv3_avg_op_latency nfsv3:nfs:nfsv3_op_percent nfsv3:nfs:nfsv3_write_ops nfsv3:nfs:nfsv3_write_latency nfsv3:nfs:nfsv3_read_ops nfsv3:nfs:nfsv3_read_latency nfsv3:nfs:nfsv3_ops'
It's good to note that while stats show averages, nfs_hist shows a histogram, and can spot the occasional very high latency operation. Good to watch.
I just poked around, there is a cifs component for stats, and it shows some interesting metrics the cifs users might want to watch.
filer01*> stats show cifsdomain cifs cifs:cifs:cifs_ops:2658/s cifs:cifs:cifs_op_count: GetAttr: 1296 Read: 989 Write: 0 Lock: 1 Open/Close: 23 Directory: 0 Other: 335 cifs:cifs:cifs_op_pct: GetAttr: 48% Read: 37% Write: 0% Lock: 0% Open/Close: 0% Directory: 0% Other: 12% cifs:cifs:cifs_latency:3.27ms cifsdomain:10.0.0.3:netlogon_latency:9.50ms cifsdomain:10.0.0.3:netlogon_latency_base:6 cifsdomain:10.0.0.3:lsa_latency:0ms cifsdomain:10.0.0.3:lsa_latency_base:0 cifsdomain:10.0.0.3:samr_latency:0ms cifsdomain:10.0.0.3:samr_latency_base:0 cifsdomain:10.0.0.2:netlogon_latency:2.00ms cifsdomain:10.0.0.2:netlogon_latency_base:1 cifsdomain:10.0.0.2:lsa_latency:0ms cifsdomain:10.0.0.2:lsa_latency_base:0 cifsdomain:10.0.0.2:samr_latency:0ms cifsdomain:10.0.0.2:samr_latency_base:0 cifsdomain:10.0.0.1:netlogon_latency:0ms cifsdomain:10.0.0.1:netlogon_latency_base:0 cifsdomain:10.0.0.1:lsa_latency:0ms cifsdomain:10.0.0.1:lsa_latency_base:0 cifsdomain:10.0.0.1:samr_latency:0ms cifsdomain:10.0.0.1:samr_latency_base:0
There's also smb_hist.
That's from a 960 running 6.5.6PsomethingDsomething....
-Blake
On 11/15/06, George, Andrew georgea@anz.com wrote:
We only use our filers for CIFS (so this may be completely inapplicable to you)
- Cache age! Mainly because when I have seen filers that are worked to
death, that's the value that tends to react to it (though CP there are a lot of secondary metrics to support that).
- As mentioned by someone else...the magic metric is how badly the
users are bitching. That being a little "rubbery" we also check cache age, cp type, disk utilisation, cpu usage, Ops/sec and network traffic to determine if anything's bottlenecking.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Rohit Sent: Wednesday, 15 November 2006 9:59 PM To: toasters@mathworks.com Subject: Measuring Filer Performance
Hi Folks
I had some open questions and i hope you'll help me answer them based on your experience.
- 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 ?
- At your place, what metrics do you use to determine if a filer is
still good enough not to worry about ?
thanks rohit
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