File zfs-fuse.8.xml of Package zfs-fuse.import4206

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File zfs-fuse.8.xml of Package zfs-fuse.import4206

<?xml version='1.0' encoding='ISO-8859-1'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [

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<!ENTITY dhfirstname "<firstname>Bryan</firstname>">
  <!ENTITY dhsurname   "<surname>Donlan</surname>">
  
  <!ENTITY dhdate      "<date>2010-06-09</date>">
  
  <!ENTITY dhsection   "<manvolnum>8</manvolnum>">
  <!ENTITY dhemail     "<email>bdonlan@gmail.com</email>">
  <!ENTITY dhusername  "Bryan Donlan">
  <!ENTITY dhucpackage "<refentrytitle>zfs-fuse</refentrytitle>">
  <!ENTITY dhpackage   "zfs-fuse">

<!ENTITY debian      "<productname>Debian</productname>">
  <!ENTITY gnu         "<acronym>GNU</acronym>">
  <!ENTITY gpl         "&gnu; <acronym>GPL</acronym>">
]>

<refentry>
  <refentryinfo>
    <address>
      &dhemail;
    </address>
    <copyright>
      <year>2010</year>
      <holder>&dhusername;</holder>
    </copyright>
    &dhdate;
  </refentryinfo>
  <refmeta>
    &dhucpackage;

&dhsection;
  </refmeta>
  <refnamediv>
    <refname>&dhpackage;</refname>

<refpurpose>ZFS filesystem daemon</refpurpose>
  </refnamediv>
  <refsynopsisdiv>
    <cmdsynopsis>
      <command>&dhpackage;</command>

<arg><option>--pidfile <replaceable>filename</replaceable></option></arg>
      <arg><option>--no-daemon</option></arg>
      <arg><option>--no-kstat-mount</option></arg>
      <arg><option>--disable-block-cache</option></arg>
      <arg><option>--disable-page-cache</option></arg>
      <arg><option>--fuse-attr-timeout <replaceable>SECONDS</replaceable></option></arg>
      <arg><option>--fuse-entry-timeout <replaceable>SECONDS</replaceable></option></arg>
      <arg><option>--log-uberblocks</option></arg>
      <arg><option>--max-arc-size <replaceable>MB</replaceable></option></arg>
      <arg><option>--fuse-mount-options <replaceable>OPT,OPT,OPT...</replaceable></option></arg>
      <arg><option>--min-uberblock-txg <replaceable>MIN</replaceable></option></arg>
      <arg><option>--stack-size=<replaceable>size</replaceable></option></arg>
      <arg><option>--help</option></arg>
    </cmdsynopsis>
  </refsynopsisdiv>
  <refsect1>
    <title>DESCRIPTION</title>

<para>This manual page documents briefly the
      <command>&dhpackage;</command> command.</para>

<para><command>&dhpackage;</command> is a daemon which provides support for
        the ZFS filesystem, via fuse. Ordinarily this daemon will be invoked
        from system boot scripts.</para>

</refsect1>
  <refsect1>
    <title>OPTIONS</title>

<para>This program follows the usual &gnu; command line syntax,
      with long options starting with two dashes (`-').  A summary of
      options is included below.  For a complete description, see the
      <application>Info</application> files.</para>

<variablelist>
      <varlistentry>
        <term><option>-h</option>
          <option>--help</option>
        </term>
        <listitem>
          <para>Show summary of options.</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><option>-p <replaceable>filename</replaceable></option>
            <option>--pidfile <replaceable>filename</replaceable></option>
        </term>
        <listitem>
          <para>Write the daemon's PID to <replaceable>filename</replaceable>
            after daemonizing. Ignored if <option>--no-daemon</option> is passed.
            <replaceable>filename</replaceable> should be a fully-qualified path.
          </para>
        </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-n</option>
              <option>--no-daemon</option>
          </term>
          <listitem>
              <para>Stay in foreground, don't daemonize.</para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--no-kstat-mount</option>
          </term>
          <listitem>
              <para>
                  Do not mount kstats in /zfs-kstat
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--disable-block-cache</option>
          </term>
          <listitem>
              <para>
                  Enable direct I/O for disk operations. Completely
                  disables caching reads and writes in the kernel
                  block cache.  Breaks mmap() in ZFS datasets too.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--disable-page-cache</option>
          </term>
          <listitem>
              <para>
                  Disable the page cache for files residing within
                  ZFS filesystems.  Not recommended as it slows down
                  I/O operations considerably.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-a <replaceable>SECONDS</replaceable></option>
              <option>--fuse-attr-timeout <replaceable>SECONDS</replaceable></option>
          </term>
          <listitem>
              <para>
                  Sets timeout for caching FUSE attributes in kernel.
                  Defaults to 0.0.
                  Higher values give a 40% performance boost.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-e <replaceable>SECONDS</replaceable></option>
              <option>--fuse-entry-timeout <replaceable>SECONDS</replaceable></option>
          </term>
          <listitem>
              <para>
                  Sets timeout for caching FUSE entries in kernel.
                  Defaults to 0.0.
                  Higher values give a 10000% performance boost
                  but cause file permission checking security issues.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--log-uberblocks</option>
          </term>
          <listitem>
              <para>
                  Logs uberblocks of any mounted filesystem to syslog
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-m <replaceable>MB</replaceable></option>
              <option>--max-arc-size <replaceable>MB</replaceable></option>
          </term>
          <listitem>
              <para>
                  Forces the maximum ARC size (in megabytes).
                  Range: 16 to 16384.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-o <replaceable>OPT...</replaceable></option>
              <option>--fuse-mount-options <replaceable>OPT,OPT,OPT...</replaceable></option>
          </term>
          <listitem>
              <para>
                  Sets FUSE mount options for all filesystems.
                  Format: comma-separated string of characters.
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-u <replaceable>MIN</replaceable></option>
              <option>--min-uberblock-txg <replaceable>MIN</replaceable></option>
          </term>
          <listitem>
              <para>
                  Skips uberblocks with a TXG &lt; <replaceable>MIN</replaceable> when mounting any fs
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-v <replaceable>MB</replaceable></option>
              <option>--vdev-cache-size <replaceable>MB</replaceable></option>
          </term>
          <listitem>
              <para>
                  adjust the size of the vdev cache. Default : 10
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--zfs-prefetch-disable</option>
          </term>
          <listitem>
              <para>
                  Disable the high level prefetch cache in zfs.
                  This thing can eat up to 150 Mb of ram, maybe more
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>--stack-size=<replaceable>size</replaceable></option>
          </term>
          <listitem>
              <para>
                  Limit the stack <replaceable>size</replaceable> of threads (in kb).
                  default : no limit (8 Mb for linux)
              </para>
          </listitem>
      </varlistentry>
      <varlistentry>
          <term>
              <option>-h</option>
              <option>--help</option>
          </term>
          <listitem>
              <para>
                  Show this usage summary.
              </para>
          </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>
  <refsect1>
    <title>REMARKS ON PRECEDENCE</title>

<para>Note that the parameters passed on the command line take precedence
        over those supplied through /etc/zfs/zfsrc.</para>

</refsect1>
  <refsect1>
      <title>BUGS/CAVEATS</title>

<para>The path to the configuration file (/etc/zfs/zfsrc) cannot at this
        time be configured.</para>
    <para>Most existing packages suggest settings can be set at the top of
        their init script. These get frequently overridden by a (distribution
        specific) /etc/default/zfs-fuse file, if it exists. Be sure to look at
        these places if you want your changes to options to take effect.</para>
    <para>The /etc/zfs/zfsrc is going to be the recommended approach in the
        future. So, packagers, please refrain from passing commandline
        parameters within the initscript (except for --pid-file).</para>

</refsect1>
  <refsect1>
    <title>SEE ALSO</title>

<para>zfs (8), zpool (8), zdb(8), zstreamdump(8), /etc/zfs/zfsrc</para>

</refsect1>
  <refsect1>
    <title>AUTHOR</title>

<para>This manual page was written by &dhusername; &dhemail; for
      the &debian; system (but may be used by others).  Permission is
      granted to copy, distribute and/or modify this document under
      the terms of the &gnu; General Public License, Version 2 any 
      later version published by the Free Software Foundation,
      or the Common Development and Distribution License.
    </para>
    <para>Revised by Seth Heeren <email>zfs-fuse@sehe.nl</email></para>
	<para>
	  On Debian systems, the complete text of the GNU General Public
          License can be found in /usr/share/common-licenses/GPL. The text of
          the Common Development and Distribution Licence may be found at
          /usr/share/doc/zfs-fuse/copyright
	</para>

</refsect1>
</refentry>

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