What is Nfsiostat?

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What is Nfsiostat?

The nfsiostat command works as iostat command for the NFS mount points on the server. It uses the file /proc/self/mountstats as input and provides information about the input/output performance of NFS shares mounted in the system.

How is NFS latency measured?

Using avg RTT (Round Trip Time) field to determine NFS latency. The average Round Trip Time (avg RTT) in milliseconds is a good measurement for NFS latency. In below example, The avg RTT (Round Trip Time) column is the average latency of the connection in ms.

How check NFS Iostat Linux?

Say hello to nfstat command

  1. Show all information about all versions of NFS. # nfsstat -o all -234. # nfsstat –verbose -234.
  2. Show all information about active versions of NFS. # nfsstat -o all.
  3. Show statistics for NFS version 3 server. # nfsstat –nfs –server -3.
  4. Show information about mounted NFS filesystems. # nfsstat -m.

How do I know if NFS is running on Linux?

Verifying that NFS is running (Linux and UNIX)

  1. AIX® operating systems: Type the following command on each computer: lssrc -g nfs The Status field for NFS processes should indicate active .
  2. Linux® operating systems: Type the following command on each computer: showmount -e hostname.

How can I make NFS faster?

Start plenty of NFS daemon threads.

  1. If read dominates, add RAM on the clients to cache more of the file systems and reduce read operations.
  2. If write dominates, make sure the clients are using noatime,nodiratime to avoid updating access times.
  3. If getattr dominates, tune the attribute caches.

Which daemon is not required to run NFS service?

To support NFS file locking, the lockd and statd daemons are run on NFS clients and servers. However, unlike previous versions of NFS, in NFS version 4, the daemons lockd, statd, mountd, and nfslogd are not used. This section describes the following daemons.