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<TITLE>Administration Reference</TITLE>
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<A NAME="Top_Of_Page"></A>
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<H1>Administration Reference</H1>
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<HR><P ALIGN="center"> <A HREF="../index.htm"><IMG SRC="../books.gif" BORDER="0" ALT="[Return to Library]"></A> <A HREF="auarf002.htm#ToC"><IMG SRC="../toc.gif" BORDER="0" ALT="[Contents]"></A> <A HREF="auarf128.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Bot_Of_Page"><IMG SRC="../bot.gif" BORDER="0" ALT="[Bottom of Topic]"></A> <A HREF="auarf130.htm"><IMG SRC="../next.gif" BORDER="0" ALT="[Next Topic]"></A> <A HREF="auarf284.htm#HDRINDEX"><IMG SRC="../index.gif" BORDER="0" ALT="[Index]"></A> <P>
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<P>
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<H2><A NAME="HDRFILESERVER" HREF="auarf002.htm#ToC_143">fileserver</A></H2>
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<A NAME="IDX4701"></A>
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<A NAME="IDX4702"></A>
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<A NAME="IDX4703"></A>
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<P><STRONG>Purpose</STRONG>
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<P>Initializes the File Server component of the <B>fs</B> process
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<P><STRONG>Synopsis</STRONG>
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<PRE><B>fileserver</B> [<B>-d</B> <<VAR>debug level</VAR>>] [<B>-p</B> <<VAR>number of processes</VAR>>]
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[<B>-spare</B> <<VAR>number of spare blocks</VAR>>]
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[<B>-pctspare</B> <<VAR>percentage spare</VAR>>] [<B>-b</B> <<VAR>buffers</VAR>>]
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[<B>-l</B> <<VAR>large vnodes</VAR>>] [<B>-s</B> <<VAR>small nodes</VAR>>]
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[<B>-vc</B> <<VAR>volume cachesize</VAR>>] [<B>-w</B> <<VAR>call back wait interval</VAR>>]
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[<B>-cb</B> <<VAR>number of call backs</VAR>>]
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[<B>-banner</B> (print banner every 10 minutes)]
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[<B>-novbc</B> (whole volume cbs disabled)]
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[<B>-implicit</B> <<VAR>admin mode bits: rlidwka</VAR>>]
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[<B>-hr</B> <<VAR>number of hours between refreshing the host cps</VAR>>]
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[<B>-busyat</B> <<VAR>redirect clients when queue > n</VAR>>]
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[<B>-rxpck</B> <<VAR>number of rx extra packets</VAR>>]
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[<B>-rxdbg</B> (enable rx debugging)]
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[<B>-rxdbge</B> (enable rxevent debugging)]
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[<B>-m</B> <<VAR>min percentage spare in partition</VAR>>]
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[<B>-lock</B> (keep fileserver from swapping)]
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[<B>-L</B> (large server conf)] [<B>-S</B> (small server conf)]
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[<B>-k</B> <<VAR>stack size</VAR>>] [<B>-realm</B> <<VAR>Kerberos realm name</VAR>>]
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[<B>-udpsize</B> <<VAR>size of socket buffer in bytes</VAR>>]
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[<B>-enable_peer_stats</B>] [<B>-enable_process_stats</B>]
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[<B>-help</B>]
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</PRE>
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<P>This command does not use the syntax conventions of the AFS command
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suites. Provide the command name and all option names in full.
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<P><STRONG>Description</STRONG>
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<P>The <B>fileserver</B> command initializes the File Server component of
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the <B>fs</B> process. In the conventional configuration, its
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binary file is located in the <B>/usr/afs/bin</B> directory on a file
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server machine.
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<P>The <B>fileserver</B> command is not normally issued at the command
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shell prompt, but rather placed into a database server machine's
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<B>/usr/afs/local/BosConfig</B> file with the <B>bos create</B>
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command. If it is ever issued at the command shell prompt, the issuer
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must be logged onto a file server machine as the local superuser
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<B>root</B>.
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<P>The File Server creates the <B>/usr/afs/logs/FileLog</B> log file as it
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initializes, if the file does not already exist. It does not write a
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detailed trace by default, but use the <B>-d</B> option to increase the
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amount of detail. Use the <B>bos getlog</B> command to display the
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contents of the log file.
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<P>The command's arguments enable the administrator to control many
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aspects of the File Server's performance, as detailed in the
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<B>Options</B> section. By default the <B>fileserver</B>
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command sets values for many arguments that are suitable for a medium-sized
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file server machine. To set values suitable for a small or large file
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server machine, use the <B>-S</B> or <B>-L</B> flag
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respectively. The following list describes the parameters and
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corresponding argument for which the <B>fileserver</B> command sets
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default values, and <A HREF="#TBLFILESERVER-ARGS">Table 1</A> summarizes the setting for each of the three machine
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sizes.
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<UL>
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<P><LI>The maximum number of lightweight processes (LWPs) the File Server uses to
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handle requests for data; corresponds to the <B>-p</B>
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argument. The File Server always uses a minimum of 32 KB for these
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processes.
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<P><LI>The maximum number of directory blocks the File Server caches in
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memory; corresponds to the <B>-b</B> argument. Each cached
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directory block (buffer) consumes 2,092 bytes of memory.
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<P><LI>The maximum number of large vnodes the File Server caches in memory for
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tracking directory elements; corresponds to the <B>-l</B>
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argument. Each large vnode consumes 292 bytes of memory.
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<P><LI>The maximum number of small vnodes the File Server caches in memory for
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tracking file elements; corresponds to the <B>-s</B> argument.
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Each small vnode consumes 100 bytes of memory.
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<P><LI>The maximum volume cache size, which determines how many volumes the File
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Server can cache in memory before having to retrieve data from disk;
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corresponds to the <B>-vc</B> argument.
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<P><LI>The maximum number of callback structures the File Server caches in
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memory; corresponds to the <B>-cb</B> argument. Each callback
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structure consumes 16 bytes of memory.
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<P><LI>The maximum number of <B>Rx</B> packets the File Server uses;
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corresponds to the <B>-rxpck</B> argument. Each packet consumes
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1544 bytes of memory.
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</UL>
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<BR>
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<P><B><A NAME="TBLFILESERVER-ARGS" HREF="auarf003.htm#FT_TBLFILESERVER-ARGS">Table 1. File Server configuration parameters</A></B><BR>
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<TABLE WIDTH="100%" BORDER>
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<TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Parameter (Argument)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">Small configuration (<B>-S</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">Medium configuration (default)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">Large configuration (<B>-L</B>)
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of LWPs (<B>-p</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">6
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">9
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">12
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of cached directory blocks (<B>-b</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">70
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">90
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">120
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of cached large vnodes (<B>-l</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">200
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">400
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">600
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of cached small vnodes (<B>-s</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">200
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">400
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">600
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Maximum volume cache size (<B>-vc</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">200
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">400
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">600
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of callbacks (<B>-cb</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">20,000
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">60,000
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">64,000
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</TD></TR><TR>
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="40%">Number of <B>Rx</B> packets (<B>-rxpck</B>)
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="20%">100
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="19%">150
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</TD><TD ALIGN="LEFT" VALIGN="TOP" WIDTH="21%">200
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</TD></TR></TABLE>
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<P>To override any of the values, provide the indicated argument (which can be
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combined with the <B>-S</B> or <B>-L</B> flag).
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<P>The amount of memory required for the File Server varies. The
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approximate default memory usage is 751 KB when the <B>-S</B> flag is used
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(small configuration), 1.1 MB when all defaults are used (medium
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configuration), and 1.4 MB when the <B>-L</B> flag is used (large
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configuration). If additional memory is available, increasing the value
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of the <B>-cb</B> and <B>-vc</B> arguments can improve File Server
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performance most directly.
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<P>By default, the File Server allows a volume to exceed its quota by 1 MB
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when an application is writing data to an existing file in a volume that is
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full. The File Server still does not allow users to create new files in
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a full volume. To change the default, use one of the following
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arguments:
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<A NAME="IDX4704"></A>
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<UL>
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<P><LI>Set the <B>-spare</B> argument to the number of extra kilobytes that
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the File Server allows as overage. A value of <B>0</B> allows no
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overage.
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<P><LI>Set the <B>-pctspare</B> argument to the percentage of the
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volume's quota the File Server allows as overage.
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</UL>
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<P>By default, the File Server implicitly grants the <B>a</B>
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(<B>administer</B>) and <B>l</B> (<B>lookup</B>) permissions to
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the <B>system:administrators</B> on the access control list (ACL) of
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every directory in the volumes stored on its file server machine. In
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other words, the group's members can exercise those two permissions even
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when an entry for the group does not appear on an ACL. To change the
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set of default permissions, use the <B>-implicit</B> argument.
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<P>The File Server maintains a <I>host current protection subgroup</I>
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(<I>host CPS</I>) for each client machine from which it has received a
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data access request. Like the CPS for a user, a host CPS lists all of
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the Protection Database groups to which the machine belongs, and the File
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Server compares the host CPS to a directory's ACL to determine in what
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manner users on the machine are authorized to access the directory's
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contents. When the <B>pts adduser</B> or <B>pts removeuser</B>
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command is used to change the groups to which a machine belongs, the File
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Server must recompute the machine's host CPS in order to notice the
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change. By default, the File Server contacts the Protection Server
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every two hours to recompute host CPSs, implying that it can take that long
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for changed group memberships to become effective. To change this
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frequency, use the <B>-hr</B> argument.
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<TABLE><TR><TD ALIGN="LEFT" VALIGN="TOP"><B>Note:</B></TD><TD ALIGN="LEFT" VALIGN="TOP">The AIX operating system does not automatically reserve a part of each
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partition to avoid the negative consequences that can result when the space on
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a partition is completely exhausted. Therefore, the AIX version of the
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File Server creates an 8% disk reserve automatically. To change the
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percentage, use the <B>-m</B> argument.
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</TD></TR></TABLE>
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<P>The File Server generates the following message when a partition is nearly
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full:
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<PRE> No space left on device
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</PRE>
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<P><STRONG>Cautions</STRONG>
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<P>Do not use the <B>-k</B> and <B>-w</B> arguments, which are
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intended for use by the AFS Development group only. Changing them from
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their default values can result in unpredictable File Server behavior.
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In any case, on many operating systems the File Server uses native threads
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rather than the LWP threads, so using the <B>-k</B> argument to set the
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number of LWP threads has no effect.
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<P>Do not specify both the <B>-spare</B> and <B>-pctspare</B>
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arguments. Doing so causes the File Server to exit, leaving an error
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message in the <B>/usr/afs/logs/FileLog</B> file.
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<P>Options that are available only on some system types, such as the
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<B>-m</B> and <B>-lock</B> options, appear in the output generated by
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the <B>-help</B> option only on the relevant system type.
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<P><STRONG>Options</STRONG>
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<DL>
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<P><DT><B>-d
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</B><DD>Sets the detail level for the debugging trace written to the
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<B>/usr/afs/logs/FileLog</B> file. Provide one of the following
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values, each of which produces an increasingly detailed trace:
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<B>0</B>, <B>1</B>, <B>5</B>, <B>25</B>, and
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<B>125</B>. The default value of <B>0</B> produces only a few
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messages.
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<P><DT><B>-p
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</B><DD>Sets the number of threads to run. Provide a positive
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integer. The File Server creates and uses five threads for special
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purposes, in addition to the number specified (but if this argument specifies
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the maximum possible number, the File Server automatically uses five of the
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threads for its own purposes).
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<P>The maximum number of threads can differ in each release of AFS.
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Consult the <I>IBM AFS Release Notes</I> for the current release.
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<P><DT><B>-spare
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</B><DD>Specifies the number of additional kilobytes an application can store in a
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volume after the quota is exceeded. Provide a positive integer; a
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value of <B>0</B> prevents the volume from ever exceeding its
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quota. Do not combine this argument with the <B>-pctspare</B>
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argument.
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<P><DT><B>-pctspare
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</B><DD>Specifies the amount by which the File Server allows a volume to exceed
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its quota, as a percentage of the quota. Provide an integer between
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<B>0</B> and <B>99</B>. A value of <B>0</B> prevents the
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volume from ever exceeding its quota. Do not combine this argument with
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the <B>-spare</B> argument.
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<P><DT><B>-b
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</B><DD>Sets the number of directory buffers. Provide a positive
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integer.
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<P><DT><B>-l
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</B><DD>Sets the number of large vnodes available in memory for caching directory
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elements. Provide a positive integer.
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<P><DT><B>-s
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</B><DD>Sets the number of small vnodes available in memory for caching file
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elements. Provide a positive integer.
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<P><DT><B>-vc
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</B><DD>Sets the number of volumes the File Server can cache in memory.
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Provide a positive integer.
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<P><DT><B>-w
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</B><DD>Sets the interval at which the daemon spawned by the File Server performs
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its maintenance tasks. Do not use this argument; changing the
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default value can cause unpredictable behavior.
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<P><DT><B>-cb
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</B><DD>Sets the number of callbacks the File Server can track. Provide a
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positive integer.
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<P><DT><B>-banner
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</B><DD>Prints the following banner to <B>/dev/console</B> about every 10
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minutes.
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<PRE> File Server is running at <VAR>time</VAR>.
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</PRE>
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<P><DT><B>-novbc
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</B><DD>Prevents the File Server from breaking the callbacks that Cache Managers
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hold on a volume that the File Server is reattaching after the volume was
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offline (as a result of the <B>vos restore</B> command, for
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example). Use of this flag is strongly discouraged.
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<P><DT><B>-implicit
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</B><DD>Defines the set of permissions granted by default to the
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<B>system:administrators</B> group on the ACL of every directory in
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a volume stored on the file server machine. Provide one or more of the
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standard permission letters (<B>rlidwka</B>) and auxiliary permission
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letters (<B>ABCDEFGH</B>), or one of the shorthand notations for groups of
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permissions (<B>all</B>, <B>none</B>, <B>read</B>, and
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<B>write</B>). To review the meaning of the permissions, see the
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<B>fs setacl</B> reference page.
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<TABLE><TR><TD ALIGN="LEFT" VALIGN="TOP"><B>Note:</B></TD><TD ALIGN="LEFT" VALIGN="TOP">The File Server always implicitly grants the <B>a</B> permission to the
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<B>system:administrators</B> group, even if you use the
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<B>none</B> value.
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</TD></TR></TABLE>
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<P><DT><B><B>-hr</B>
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</B><DD>Specifies how often the File Server refreshes its knowledge of the
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machines that belong to protection groups (refreshes the host CPSs for
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machines). The File Server must update this information to enable users
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from machines recently added to protection groups to access data for which
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those machines now have the necessary ACL permissions.
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<P><DT><B>-busyat
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</B><DD>Defines the number of incoming RPCs that can be waiting for a response
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from the File Server before the File Server returns the error code
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<B>VBUSY</B> to the Cache Manager that sent the latest RPC. In
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response, the Cache Manager retransmits the RPC after a delay. This
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argument prevents the accumulation of so many waiting RPCs that the File
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Server can never process them all. Provide a positive integer.
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The default value is 600.
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<P><DT><B>-rxpck
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</B><DD>Controls the number of Rx packets the File Server uses to store data for
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incoming RPCs that it is currently handling, that are waiting for a response,
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and for replies that are not yet complete. Provide a positive
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integer.
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<P><DT><B>-rxdbg
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</B><DD>Writes a trace of the File Server's operations on Rx packets to the
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file <B>/usr/afs/logs/rx_dbg</B>.
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<P><DT><B>-rxdbge
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</B><DD>Writes a trace of the File Server's operations on Rx events (such as
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retransmissions) to the file <B>/usr/afs/logs/rx_dbg</B>.
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<P><DT><B>-m
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</B><DD>Specifies the percentage of each AFS server partition that the AIX version
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of the File Server creates as a reserve. Specify an integer value
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between <B>0</B> and <B>30</B>; the default is 8%. A value
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of <B>0</B> means that the partition can become completely full, which can
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have serious negative consequences.
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<TABLE><TR><TD ALIGN="LEFT" VALIGN="TOP"><B>Note:</B></TD><TD ALIGN="LEFT" VALIGN="TOP">This argument is available only on machines running the AIX operating system,
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and so does not appear in the syntax statement when the <B>-help</B> flag
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is used on other system types.
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</TD></TR></TABLE>
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<P><DT><B>-lock
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</B><DD>Prevents any portion of the <B>fileserver</B> binary from being paged
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(swapped) out of memory on a file server machine running the IRIX operating
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system.
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<TABLE><TR><TD ALIGN="LEFT" VALIGN="TOP"><B>Note:</B></TD><TD ALIGN="LEFT" VALIGN="TOP">This argument is available only on machines running the IRIX operating
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system, and so does not appear in the syntax statement when the
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<B>-help</B> flag is used on other system types.
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</TD></TR></TABLE>
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<P><DT><B><B>-L</B>
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</B><DD>Sets values for many arguments in a manner suitable for a large file
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server machine. Combine this flag with any option except the
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<B>-S</B> flag; omit both flags to set values suitable for a
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medium-sized file server machine.
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<P><DT><B><B>-S</B>
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</B><DD>Sets values for many arguments in a manner suitable for a small file
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server machine. Combine this flag with any option except the
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<B>-L</B> flag; omit both flags to set values suitable for a
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medium-sized file server machine.
|
|
<P><DT><B>-k
|
|
</B><DD>Sets the LWP stack size in units of 1 kilobyte. Do not use this
|
|
argument, and in particular do not specify a value less than the default of
|
|
24.
|
|
<P><DT><B>-realm
|
|
</B><DD>Defines the Kerberos realm name for the File Server to use. If this
|
|
argument is not provided, it uses the realm name corresponding to the cell
|
|
listed in the local <B>/usr/afs/etc/ThisCell</B> file.
|
|
<P><DT><B>-udpsize
|
|
</B><DD>Sets the size of the UDP buffer, which is 64 KB by default. Provide
|
|
a positive integer, preferably larger than the default.
|
|
<P><DT><B>-enable_peer_stats
|
|
</B><DD>Activates the collection of Rx statistics and allocates memory for their
|
|
storage. For each connection with a specific UDP port on another
|
|
machine, a separate record is kept for each type of RPC (FetchFile, GetStatus,
|
|
and so on) sent or received. To display or otherwise access the
|
|
records, use the Rx Monitoring API.
|
|
<P><DT><B>-enable_process_stats
|
|
</B><DD>Activates the collection of Rx statistics and allocates memory for their
|
|
storage. A separate record is kept for each type of RPC (FetchFile,
|
|
GetStatus, and so on) sent or received, aggregated over all connections to
|
|
other machines. To display or otherwise access the records, use the Rx
|
|
Monitoring API.
|
|
<P><DT><B>-help
|
|
</B><DD>Prints the online help for this command. All other valid options
|
|
are ignored.
|
|
</DL>
|
|
<P><STRONG>Examples</STRONG>
|
|
<P>The following <B>bos create</B> command creates an <B>fs</B>
|
|
process on the file server machine <B>fs2.abc.com</B> that
|
|
uses the large configuration size, and allows volumes to exceed their quota by
|
|
10%. Type the command on a single line:
|
|
<PRE> % <B>bos create -server fs2.abc.com -instance fs -type fs</B> \
|
|
<B>-cmd "/usr/afs/bin/fileserver -pctspare 10</B> \
|
|
<B>-L" /usr/afs/bin/volserver /usr/afs/bin/salvager</B>
|
|
</PRE>
|
|
<P><STRONG>Privilege Required</STRONG>
|
|
<P>The issuer must be logged in as the superuser <B>root</B> on a file
|
|
server machine to issue the command at a command shell prompt. It is
|
|
conventional instead to create and start the process by issuing the <B>bos
|
|
create</B> command.
|
|
<P><STRONG>Related Information</STRONG>
|
|
<P><A HREF="auarf016.htm#HDRBOSCONFIG">BosConfig</A>
|
|
<P><A HREF="auarf021.htm#HDRFILELOG">FileLog</A>
|
|
<P><A HREF="auarf098.htm#HDRBOS_CREATE">bos create</A>
|
|
<P><A HREF="auarf102.htm#HDRBOS_GETLOG">bos getlog</A>
|
|
<P><A HREF="auarf157.htm#HDRFS_SETACL">fs setacl</A>
|
|
<P><A HREF="auarf232.htm#HDRSALVAGER">salvager</A>
|
|
<P><A HREF="auarf251.htm#HDRVOLSERVER">volserver</A>
|
|
<P>
|
|
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