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The isi statistics command is an advanced tool that can be used to obtain various kinds of statistics that can help you measure the usage and performance of a PowerScale OneFS cluster. Isi statistics is a versatile utility with the various subcommand-level. It provides two subcommand-levels for protocols:
Protocol: Display cluster usage statistics organized by communication protocol.
Pstat: Generate the specified protocol detailed statistics along with CPU, OneFS, network, and disk statistics.
The NFS operations are grouped according to the classes in isi statistics as the Table 5 shows.
Port | Service | Protocol | Usage description |
4791 | RoCEv2 | UDP | In RoCEv2, the RDMA payload is encapsulated as UDP payload with the 4791 UDP destination port. |
300 | mountd | TCP/UDP | NFSv3 mount service. |
302 | statd | TCP/UDP | NFSv3 Network Status Monitor (NSM) |
304 | lockd | TCP/UDP | NFSv3 Network Lock Manager (NLM) |
111 | rpc.bind | TCP/UDP | ONC RPC portmapper that is used to locate services such as NFS, mountd. Only used by NFSv3 if NFSv4.x running on the standard registered TCP port 2049. |
isi statistics protocol
You get the detailed NFS protocol operations performance data by running the following command:
isi statistics protocol list --protocols=nfs3,nfs4 --sort=TimeAvg --degraded
isi statistics pstat
The sub-command isi statistics psstat output can help you analysis the approximate mix of read, write, and metadata operations. Figure 19 is an example output by running the following command with --protocol=nfs3 option to get the NFSv3 statistics.
You can find each operation rates for NFSv3, in this example, subtract the 33071 ops/s for read and 33992 ops/s for write from the total 146313 ops/s, which leaves 79250 ops/s for metadata operations. So the NFSv3 read, write and metadata ratio approximately: read 22.6%, write 23.2%, metadata 54.2%.