nfsstat
nfsstat
NFS (Network File System) and its related utilities. nfsstat
is a command-line utility used to display NFS client and server statistics. Here's an overview of how nfsstat
works and its typical usage:
nfsstat Command Overview
Purpose
nfsstat is used to report NFS client and server statistics, including various counters and performance metrics related to NFS operations.
Usage
Syntax:
nfsstat [options]
Options:
-c
: Displays client statistics.-s
: Displays server statistics.-m
: Displays mount information.-n
: Displays NFSv4 statistics.-o
: Displays NFSv4 operation statistics.-r
: Displays RPC (Remote Procedure Call) statistics.-t
: Displays TCP statistics for NFS.
Typical Output
Client Statistics:
Shows information such as number of NFS operations (reads, writes, etc.), caching statistics, and errors encountered by NFS clients.
Server Statistics:
Provides details on server-side NFS operations, including read/write operations, cache utilization, and errors encountered by NFS servers.
Mount Information:
Lists NFS mounts and associated details like mount options and NFS version used.
NFSv4 and RPC Statistics:
Provides NFSv4-specific statistics and RPC performance metrics, including timings and counts for various RPC operations.
TCP Statistics:
Displays statistics related to NFS over TCP connections, such as connection states, retransmissions, and errors.
Examples
Display client statistics:
nfsstat -c
Display server statistics:
nfsstat -s
Display NFSv4 operation statistics:
nfsstat -n
Usage Notes
Privileges:
nfsstat
typically requires superuser (root) privileges to access all statistics, especially server-side information.Interpretation: Understanding the output requires familiarity with NFS concepts and performance metrics, such as latency, throughput, and error rates.
Conclusion
nfsstat
is a valuable tool for administrators and developers managing NFS environments. It provides insights into NFS performance and usage, helping diagnose issues, optimize configurations, and monitor NFS operations effectively. Understanding its various options and interpreting its output is crucial for maintaining reliable NFS services.
help
Usage: nfsstat [OPTION]...
-m, --mounts Show statistics on mounted NFS filesystems
-c, --client Show NFS client statistics
-s, --server Show NFS server statistics
-2 Show NFS version 2 statistics
-3 Show NFS version 3 statistics
-4 Show NFS version 4 statistics
-o [facility] Show statistics on particular facilities.
nfs NFS protocol information
rpc General RPC information
net Network layer statistics
fh Usage information on the server's file handle cache
io Usage information on the server's io statistics
ra Usage information on the server's read ahead cache
rc Usage information on the server's request reply cache
all Select all of the above
-v, --verbose, --all Same as '-o all'
-r, --rpc Show RPC statistics
-n, --nfs Show NFS statistics
-Z[#], --sleep[=#] Collects stats until interrupted.
Cumulative stats are then printed
If # is provided, stats will be output every
# seconds.
-S, --since file Shows difference between current stats and those in 'file'
-l, --list Prints stats in list format
--version Show program version
--help What you just did
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