106 lines
2.5 KiB
HTML
106 lines
2.5 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 blkmapd</TITLE>
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</HEAD><BODY>
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<H1>blkmapd</H1>
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Section: Maintenance Commands (8)<BR>Updated: 11 August 2011<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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blkmapd - pNFS block layout mapping daemon
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>blkmapd [-h] [-d] [-f]</B>
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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>blkmapd</B>
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daemon performs device discovery and mapping for the parallel NFS (pNFS) block layout
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client [RFC5663].
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<P>
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The pNFS block layout protocol builds a complex storage hierarchy from a set
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of
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<I>simple volumes.</I>
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These simple volumes are addressed by content, using a signature on the
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volume to uniquely name each one.
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The daemon locates a volume by examining each block device in the system for
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the given signature.
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<P>
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The topology typically consists of a hierarchy of volumes built by striping,
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slicing, and concatenating the simple volumes.
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The
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<B>blkmapd</B>
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daemon uses the device-mapper driver to construct logical devices that
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reflect the server topology, and passes these devices to the kernel for use
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by the pNFS block layout client.
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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="1"><B>-h</B>
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<DD>
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Display usage message.
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<DT id="2"><B>-d</B>
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<DD>
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Performs device discovery only then exits.
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<DT id="3"><B>-f</B>
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<DD>
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Runs
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<B>blkmapd</B>
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in the foreground and sends output to stderr (as opposed to syslogd)
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</DL>
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<A NAME="lbAF"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?5+nfs">nfs</A></B>(5),
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<B><A HREF="/cgi-bin/man/man2html?8+dmsetup">dmsetup</A></B>(8)
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<P>
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RFC 5661 for the NFS version 4.1 specification.
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<BR>
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RFC 5663 for the pNFS block layout specification.
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<A NAME="lbAG"> </A>
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<H2>AUTHORS</H2>
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<BR>
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Haiying Tang <<A HREF="mailto:Tang_Haiying@emc.com">Tang_Haiying@emc.com</A>>
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<BR>
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Jim Rees <<A HREF="mailto:rees@umich.edu">rees@umich.edu</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="4"><A HREF="#lbAB">NAME</A><DD>
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<DT id="5"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="6"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="7"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="8"><A HREF="#lbAF">SEE ALSO</A><DD>
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<DT id="9"><A HREF="#lbAG">AUTHORS</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: 00:06:11 GMT, March 31, 2021
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</BODY>
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