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HTML
109 lines
5.8 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 4//EN">
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<HTML><HEAD>
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<TITLE>Administration Reference</TITLE>
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<!-- /tmp/idwt3672/auarf000.scr converted by idb2h R4.2 (359) ID -->
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<!-- Workbench Version (AIX) on 3 Oct 2000 at 16:18:30 -->
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<META HTTP-EQUIV="updated" CONTENT="Tue, 03 Oct 2000 16:18:29">
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<META HTTP-EQUIV="review" CONTENT="Wed, 03 Oct 2001 16:18:29">
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<META HTTP-EQUIV="expires" CONTENT="Thu, 03 Oct 2002 16:18:29">
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</HEAD><BODY>
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<!-- (C) IBM Corporation 2000. All Rights Reserved -->
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<BODY bgcolor="ffffff">
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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="auarf157.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="auarf159.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="HDRFS_SETCACHESIZE" HREF="auarf002.htm#ToC_172">fs setcachesize</A></H2>
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<A NAME="IDX4947"></A>
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<A NAME="IDX4948"></A>
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<A NAME="IDX4949"></A>
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<A NAME="IDX4950"></A>
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<A NAME="IDX4951"></A>
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<A NAME="IDX4952"></A>
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<A NAME="IDX4953"></A>
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<A NAME="IDX4954"></A>
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<P><STRONG>Purpose</STRONG>
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<P>Sets the size of the disk cache
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<P><STRONG>Synopsis</STRONG>
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<PRE><B>fs setcachesize</B> [<B>-blocks</B> <<VAR>size in 1K byte blocks (0 => reset)</VAR>>]
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[<B>-reset</B>] [<B>-help</B>]
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<B>fs setca</B> [<B>-b</B> <<VAR>size in 1K byte blocks (0 => reset)</VAR>>] [<B>-r</B>] [<B>-h</B>]
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<B>fs cachesize</B> [<B>-b</B> <<VAR>size in 1K byte blocks (0 => reset)</VAR>>] [<B>-r</B>] [<B>-h</B>]
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<B>fs ca</B> [<B>-b</B> <<VAR>size in 1K byte blocks (0 => reset)</VAR>>] [<B>-r</B>] [<B>-h</B>]
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</PRE>
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<P><STRONG>Description</STRONG>
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<P>The <B>fs setcachesize</B> command changes the number of kilobyte
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blocks of local disk space available to the Cache Manager for its data cache,
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on machines that use a disk cache. The command is not operative on
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machines that use a memory cache.
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<P>To return the cache size to the default value specified in the third field
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of the local <B>/usr/vice/etc/cacheinfo</B> file, provide a value of
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<B>0</B> to the <B>-blocks</B> argument.
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<P>To return the cache size to the value set when the machine was last
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rebooted, use the <B>-reset</B> flag instead of the <B>-blocks</B>
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argument. This is normally the amount specified in the
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<B>cacheinfo</B> file, unless the <B>-blocks</B> argument was included
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on the <B>afsd</B> command to override the <B>cacheinfo</B>
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value.
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<P>To display the current cache size and amount of cache in use, for both disk
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and memory caches, use the <B>fs getcacheparms</B> command.
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<P><STRONG>Cautions</STRONG>
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<P>This command is not operative on machines using a memory cache, and results
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in an error message. To change memory cache size, edit the
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<B>cacheinfo</B> file and reboot, or reboot and provide the
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<B>-blocks</B> argument to the <B>afsd</B> command.
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<P>On machines using a disk cache, do not set the cache size to exceed 85% to
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90% of the actual disk space available for the cache directory. The
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cache implementation itself requires a small amount of space on the
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partition.
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<P><STRONG>Options</STRONG>
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<DL>
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<P><DT><B>-blocks
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</B><DD>Specifies the number of one-kilobyte blocks of disk space available for
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the Cache Manager to devote to the cache. Provide a value of
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<B>0</B> to set cache size to the default specified in the
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<B>cacheinfo</B> file.
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<P><DT><B>-reset
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</B><DD>Returns the cache size to the value set when the machine was last
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booted. This agrees with the value in the <B>cacheinfo</B> file
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unless the <B>-blocks</B> argument was used on the <B>afsd</B>
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command.
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<P><DT><B>-help
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</B><DD>Prints the online help for this command. All other valid options
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are ignored.
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</DL>
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<P><STRONG>Examples</STRONG>
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<P>The following command sets the disk cache size to 25000 kilobyte
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blocks.
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<PRE> % <B>fs setcachesize -blocks 25000</B>
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</PRE>
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<P>Both of the following commands reset the disk cache size to the value in
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the <B>cacheinfo</B> file, assuming that the <B>-blocks</B> argument
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to the <B>afsd</B> command was not used.
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<PRE> % <B>fs setcachesize -blocks 0</B>
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% <B>fs setcachesize -reset</B>
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</PRE>
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<P><STRONG>Privilege Required</STRONG>
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<P>The issuer must be logged in as the local superuser <B>root</B>.
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<P><STRONG>Related Information</STRONG>
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<P><A HREF="auarf043.htm#HDRCACHEINFO">cacheinfo</A>
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<P><A HREF="auarf058.htm#HDRAFSD">afsd</A>
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<P><A HREF="auarf143.htm#HDRFS_GETCACHEPARMS">fs getcacheparms</A>
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<P>
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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="auarf157.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Top_Of_Page"><IMG SRC="../top.gif" BORDER="0" ALT="[Top of Topic]"></A> <A HREF="auarf159.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><HR><B>
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<br>© <A HREF="http://www.ibm.com/">IBM Corporation 2000.</A> All Rights Reserved
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</B>
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