53 lines
1.2 KiB
Plaintext
53 lines
1.2 KiB
Plaintext
=head1 NAME
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rrdlastupdate - Return the most recent update to an RRD
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=head1 SYNOPSIS
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B<rrdtool> B<lastupdate> I<filename>
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S<[B<--daemon>|B<-d> I<address>]>
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=head1 DESCRIPTION
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The B<lastupdate> function returns the UNIX timestamp and the
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value stored for each datum in the most recent update of an RRD.
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=over 8
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=item I<filename>
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The name of the B<RRD> that contains the data.
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=item B<--daemon>|B<-d> I<address>
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Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent
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to the server before reading the RRD files. This allows B<rrdtool> to return
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fresh data even if the daemon is configured to cache values for a long time.
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For a list of accepted formats, see the B<-l> option in the L<rrdcached> manual.
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rrdtool lastupdate --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
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=back
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=head1 ENVIRONMENT VARIABLES
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The following environment variables may be used to change the behavior of
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C<rrdtoolE<nbsp>lastupdate>:
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=over 4
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=item B<RRDCACHED_ADDRESS>
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If this environment variable is set it will have the same effect as specifying
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the C<--daemon> option on the command line. If both are present, the command
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line argument takes precedence.
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=back
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=head1 AUTHOR
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Andy Riebs E<lt>andy.riebs@hp.comE<gt>
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