mirror of https://github.com/tLDP/LDP
96 lines
2.8 KiB
XML
96 lines
2.8 KiB
XML
<appendix id="gfsfsim"><title>OpenGFS file system interface module</title>
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<para>
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The OpenGFS FSIM lets EVMS users create and manage OpenGFS
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file systems from within the EVMS interfaces.
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In order to use the OpenGFS FSIM, the OpenGFS utilities must be
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installed on your system. Go to
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<ulink url="http://sourceforge.net/projects/opengfs">http://sourceforge.net/projects/opengfs</ulink> for the OpenGFS project.
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</para>
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<sect1 id="createopengfsfsim"><title>Creating OpenGFS file systems</title>
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<para>
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OpenGFS file systems can be created with <command>mkfs</command> on any EVMS
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or compatibility volume that does not already
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have a file system and that is produced from a shared cluster container.
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The following options are available for creating
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OpenGFS file systems:</para>
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<variablelist>
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<varlistentry><term>blocksize</term>
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<listitem>
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<para>Set the file system block size.
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The block size is in bytes.
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The block size must be a power of 2 between 512 and 65536, inclusive.
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The default block size is 4096 bytes.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term>journals</term>
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<listitem>
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<para>The names of the journal volumes, one for each node.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term>protocol</term>
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<listitem>
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<para>Specify the name of the locking protocol to use.
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The choices are "memexp" and "opendlm."
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term>lockdev</term>
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<listitem>
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<para>Specify the shared volume to be used to contain the locking metadata.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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The OpenGFS FSIM only takes care of file system operations.
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It does not take care of OpenGFS cluster and node configuration.
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Before the volumes can be mounted, you must configure the cluster and
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node separately after you have made the file system and saved the changes.
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</para>
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</sect1>
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<sect1 id="checkopengfsfsim"><title>Checking OpenGFS file systems</title>
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<para>
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The OpenGFS utility for checking the file system has no additional options.
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</para>
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</sect1>
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<sect1 id="removeopengfsfsim"><title>Removing OpenGFS file systems</title>
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<para>
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An OpenGFS file system can be removed from its volume if the file system is
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unmounted. This operation involves erasing the superblock from the volume,
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erasing the log headers for the journal volumes, and erasing the control
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block on the cluster configuration volume associated with the file
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system volume so that the file system will not be recognized in the future.
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There are no options available for removing file systems.
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</para>
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</sect1>
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<sect1 id="expandshrinkopengfsfsim"><title>Expanding and shrinking OpenGFS
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file systems</title>
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<para>
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OpenGFS only allows a volume to be expanded.
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OpenGFS only allows a volume to expanded when the volume is mounted.
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An OpenGFS file system is automatically expanded when its volume is
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expanded.
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</para>
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</sect1>
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</appendix>
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