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<TITLE>Administration Reference</TITLE>
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<META HTTP-EQUIV="updated" CONTENT="Tue, 03 Oct 2000 16:18:29">
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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="auarf087.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="auarf089.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="HDRBK_SETEXP" HREF="auarf002.htm#ToC_102">backup setexp</A></H2>
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<A NAME="IDX4406"></A>
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<A NAME="IDX4407"></A>
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<A NAME="IDX4408"></A>
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<P><STRONG>Purpose</STRONG>
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<P>Sets the expiration date for existing dump levels.
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<P><STRONG>Synopsis</STRONG>
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<PRE><B>backup setexp -dump</B> <<VAR>dump level name</VAR>><SUP>+</SUP> [<B>-expires</B> <<VAR>expiration date</VAR>><SUP>+</SUP>]
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[<B>-localauth</B>] [<B>-cell</B> <<VAR>cell name</VAR>>] [<B>-help</B>]
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<B>backup se -d</B> <<VAR>dump level name</VAR>><SUP>+</SUP> [<B>-e</B> <<VAR>expiration date</VAR>><SUP>+</SUP>]
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[<B>-l</B>] [<B>-c</B> <<VAR>cell name</VAR>>] [<B>-h</B>]
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</PRE>
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<P><STRONG>Description</STRONG>
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<P>The <B>backup setexp</B> command sets or changes the expiration date
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associated with each specified dump level, which must already exist in the
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dump hierarchy.
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<P>Use the <B>-expires</B> argument to associate an expiration date with
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each dump level. When the Backup System subsequently creates a dump at
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the dump level, it uses the specified value to derive the dump's
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expiration date, which it records on the label of the tape (or backup data
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file). The Backup System refuses to overwrite a tape until after the
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latest expiration date of any dump that the tape contains, unless the
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<B>backup labeltape</B> command is used to relabel the tape. If a
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dump level does not have an expiration date, the Backup System treats dumps
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created at the level as expired as soon as it creates them.
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<P>(Note that the Backup System does not automatically remove a dump's
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record from the Backup Database when the dump reaches its expiration date, but
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only if the tape that contains the dump is recycled or relabeled. To
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remove expired and other obsolete dump records, use the <B>backup
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deletedump</B> command.)
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<P>Define either an absolute or relative expiration date:
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<UL>
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<P><LI>An absolute expiration date defines the month/day/year (and, optionally,
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hour and minutes) at which a dump expires. If the expiration date
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predates the dump creation time, the Backup System immediately treats the dump
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as expired.
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<P><LI>A relative date defines the number of years, months, or days (or a
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combination of the three) after the dump's creation that it
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expires. When the Backup System creates a dump at the dump level, it
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calculates an actual expiration date by adding the relative date to the start
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time of the dump operation.
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</UL>
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<P>If the command is used to change an existing expiration date associated
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with a dump level, the new date applies only to dumps created after the
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change. Existing dumps retain the expiration date assigned at the time
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they were created.
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<P><STRONG>Options</STRONG>
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<DL>
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<P><DT><B>-dump
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</B><DD>Specifies the full pathname of each dump level to assign the expiration
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date specified by the <B>-expires</B> argument.
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<P><DT><B>-expires
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</B><DD>Defines the absolute or relative expiration date to associate with each
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dump level named by the <B>-dump</B> argument. Absolute expiration
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dates have the following format:
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<P>
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<PRE> [<B>at</B>] {<B>NEVER</B> | <VAR>mm</VAR><B>/</B><VAR>dd</VAR><B>/</B><VAR>yyyy</VAR> [<VAR>hh</VAR><B>:</B><VAR>MM</VAR>] }
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</PRE>
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<P>where the optional word <B>at</B> is followed either by the string
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<B>NEVER</B>, which indicates that dumps created at the dump level never
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expire, or by a date value with a required portion (<VAR>mm</VAR> for month,
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<VAR>dd</VAR> for day, and <VAR>yyyy</VAR> for year) and an optional portion
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(<VAR>hh</VAR> for hours and <VAR>MM</VAR> for minutes).
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<P>Omit the <VAR>hh</VAR>:<VAR>MM</VAR> portion to use the default of
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midnight (00:00 hours), or provide a value in 24-hour format (for
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example, <B>20:30</B> is 8:30 p.m.).
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Valid values for the year range from <B>1970</B> to <B>2037</B>;
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higher values are not valid because the latest possible date in the standard
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UNIX representation is in February 2038. The command interpreter
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automatically reduces later dates to the maximum value.
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<P>Relative expiration dates have the following format:
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<PRE> [<B>in</B>] [<VAR>years</VAR><B>y</B>] [<VAR>months</VAR><B>m</B>] [<VAR>days</VAR><B>d</B>]
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</PRE>
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<P>
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<P>where the optional word <B>in</B> is followed by at least one of a
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number of years (maximum <B>9999</B>) followed by the letter <B>y</B>,
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a number of months (maximum <B>12</B>) followed by the letter
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<B>m</B>, or a number of days (maximum <B>31</B>) followed by the
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letter <B>d</B>. If providing more than one of the three, list them
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in the indicated order. If the date that results from adding the
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relative expiration value to a dump's creation time is later than the
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latest possible date in the UNIX time representation, the Backup System
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automatically reduces it to that date.
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<TABLE><TR><TD ALIGN="LEFT" VALIGN="TOP"><B>Note:</B></TD><TD ALIGN="LEFT" VALIGN="TOP">A plus sign follows this argument in the command's syntax statement
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because it accepts a multiword value which does not need to be enclosed in
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double quotes or other delimiters, not because it accepts multiple
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dates. Provide only one date (and optionally, time) definition to be
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associated with each dump level specified by the <B>-dump</B>
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argument.
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</TD></TR></TABLE>
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<P><DT><B>-localauth
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</B><DD>Constructs a server ticket using a key from the local
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<B>/usr/afs/etc/KeyFile</B> file. The <B>backup</B> command
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interpreter presents it to the Backup Server, Volume Server and VL Server
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during mutual authentication. Do not combine this flag with the
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<B>-cell</B> argument. For more details, see the introductory
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<B>backup</B> reference page.
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<P><DT><B>-cell
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</B><DD>Names the cell in which to run the command. Do not combine this
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argument with the <B>-localauth</B> flag. For more details, see the
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introductory <B>backup</B> reference page.
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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 example associates an absolute expiration date of 10:00
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p.m. on 31 December 1999 with the dump level
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<B>/1998/december</B>:
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<PRE> % <B>backup setexp -dump /1998/december -expires at 12/31/1999 22:00</B>
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</PRE>
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<P>The following example associates a relative expiration date of 7 days with
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the two dump levels <B>/monthly/week1</B> and
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<B>/monthly/week2</B>:
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<PRE> % <B>backup setexp -dump /monthly/week1 /monthly/week -expires 7d</B>
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</PRE>
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<P><STRONG>Privilege Required</STRONG>
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<P>The issuer must be listed in the <B>/usr/afs/etc/UserList</B> file on
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every machine where the Backup Server is running, or must be logged onto a
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server machine as the local superuser <B>root</B> if the
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<B>-localauth</B> flag is included.
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<P><STRONG>Related Information</STRONG>
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<P><A HREF="auarf060.htm#HDRBK_INTRO">backup</A>
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<P><A HREF="auarf061.htm#HDRBK_ADDDUMP">backup adddump</A>
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<P><A HREF="auarf067.htm#HDRBK_DELDUMP">backup deldump</A>
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<P><A HREF="auarf080.htm#HDRBK_LISTDUMPS">backup listdumps</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="auarf087.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="auarf089.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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<br>© <A HREF="http://www.ibm.com/">IBM Corporation 2000.</A> All Rights Reserved
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