198 lines
4.6 KiB
HTML
198 lines
4.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of nfsiostat</TITLE>
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</HEAD><BODY>
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<H1>nfsiostat</H1>
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Section: Maintenance Commands (8)<BR>Updated: 15 Apr 2010<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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nfsiostat - Emulate iostat for NFS mount points using /proc/self/mountstats
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>nfsiostat [[</B><I><interval></I><B>] [</B><I><count></I><B>]] [</B><I><options></I><B>][<mount_point></B><I>]</I>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>nfsiostat</B>
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command displays NFS client per-mount statisitics.
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<DL COMPACT>
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<DT id="1"><interval><DD>
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specifies the amount of time in seconds between each report.
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The first report contains statistics for the time since each file
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system was mounted. Each subsequent report contains statistics collected
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during the interval since the previous report.
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<DT id="2"><count><DD>
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If the
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<I><count></I>
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parameter is
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specified, the value of
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<I><count> </I>
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determines the number of reports generated at
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<I><interval> </I>
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seconds apart. if the interval parameter is
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specified without the
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<I><count> </I>
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parameter, the command generates reports continuously.
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<DT id="3"><options><DD>
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Define below
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<DT id="4"><mount_point><DD>
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If one or more
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<I><mount point> </I>
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names are specified, statistics for only these mount points will
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be displayed. Otherwise, all NFS mount points on the client are listed.
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<DT id="5">The meaning of each column of <B>nfsiostat</B>'s output is the following:<DD>
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<DL COMPACT><DT id="6"><DD>
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- <B>op/s</B>
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<DL COMPACT><DT id="7"><DD>
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This is the number of operations per second.
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<DL COMPACT><DT id="8"><DD>
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</DL>
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</DL>
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</DL>
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<DL COMPACT><DT id="9"><DD>
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- <B>rpc bklog</B>
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<DL COMPACT><DT id="10"><DD>
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This is the length of the backlog queue.
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</DL>
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</DL>
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<DL COMPACT><DT id="11"><DD>
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- <B>kB/s</B>
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<DL COMPACT><DT id="12"><DD>
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This is the number of kB written/read per second.
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</DL>
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</DL>
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<DL COMPACT><DT id="13"><DD>
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- <B>kB/op</B>
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<DL COMPACT><DT id="14"><DD>
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This is the number of kB written/read per each operation.
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</DL>
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</DL>
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<DL COMPACT><DT id="15"><DD>
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- <B>retrans</B>
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<DL COMPACT><DT id="16"><DD>
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This is the number of retransmissions.
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</DL>
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</DL>
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<DL COMPACT><DT id="17"><DD>
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- <B>avg RTT (ms)</B>
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<DL COMPACT><DT id="18"><DD>
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This is the duration from the time that client's kernel sends the RPC request until the time it receives the reply.
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</DL>
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</DL>
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<DL COMPACT><DT id="19"><DD>
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- <B>avg exe (ms)</B>
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<DL COMPACT><DT id="20"><DD>
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This is the duration from the time that NFS client does the RPC request to its kernel until the RPC request is completed, this includes the RTT time above.
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</DL>
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</DL>
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<DT id="21">Note that if an interval is used as argument to <B>nfsiostat</B>, then the diffrence from previous interval will be displayed, otherwise the results will be from the time that the share was mounted.<DD>
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<P>
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</DL>
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<DL COMPACT>
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<DT id="22"><B>-a or --attr</B>
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<DD>
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displays statistics related to the attribute cache
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<DT id="23"><B>-d or --dir </B>
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<DD>
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displays statistics related to directory operations
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<DT id="24"><B>-h or --help </B>
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<DD>
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shows help message and exit
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<DT id="25"><B>-l LIST or --list=LIST </B>
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<DD>
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only print stats for first LIST mount points
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<DT id="26"><B>-p or --page</B>
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<DD>
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displays statistics related to the page cache
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<DT id="27"><B>-s or --sort</B>
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<DD>
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Sort NFS mount points by ops/second
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<DT id="28"><B>--version</B>
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<DD>
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show program's version number and exit
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</DL>
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<A NAME="lbAF"> </A>
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<H2>FILES</H2>
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<DL COMPACT>
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<DT id="29"><B>/proc/self/mountstats</B>
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<DD>
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</DL>
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<A NAME="lbAG"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?8+iostat">iostat</A></B>(8),
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<B><A HREF="/cgi-bin/man/man2html?8+mountstats">mountstats</A></B>(8),
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<B><A HREF="/cgi-bin/man/man2html?8+nfsstat">nfsstat</A>(8)</B>
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<A NAME="lbAH"> </A>
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<H2>AUTHOR</H2>
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Chuck Lever <<A HREF="mailto:chuck.lever@oracle.com">chuck.lever@oracle.com</A>>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="30"><A HREF="#lbAB">NAME</A><DD>
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<DT id="31"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="32"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="33"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="34"><A HREF="#lbAF">FILES</A><DD>
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<DT id="35"><A HREF="#lbAG">SEE ALSO</A><DD>
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<DT id="36"><A HREF="#lbAH">AUTHOR</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:14 GMT, March 31, 2021
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</BODY>
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