statistics show-periodic has a lot of objects, and frankly I don't know what objects/fields/counters to specify to diagnose performance problems. Or how to specify different fields in one output, like disk_util+cpu util+iops+latency+net_out in one output.
There were sysstat in 7-mode with all output fields explained in documentation and KB. It is more complex with Cmode because of many nodes and more objects available.
So the question is the same: How do you diagnose performance in cmode? I need to answer a question if my cluster is overutilized, where and why.
How do I get the counters for these object and more using SNMP in a Cluster Mode Filer?
For example to get the Consistency Point counters like cpFromCpDeferredOps, cpFromCpOps, cpFromFlushOps, etc we can get this information using SNMP using the OIB (18.104.22.168.4.1.722.214.171.124) as described here in 7Mode.
I don't think there is currently a MIB for cDOT for performance counters. I believe the perf data portion is moving toward a ZAPI model, so there may not be a way to capture this via SNMP in the future.