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1 | =head1 NAME |
2 | ||
0256acf5 | 3 | rrdlast - Return the date of the last data sample in an RRD |
37fc6638 | 4 | |
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5 | =head1 SYNOPSIS |
6 | ||
7 | B<rrdtool> B<last> I<filename> | |
5a00dc40 | 8 | S<[B<--daemon>|B<-d> I<address>]> |
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9 | |
10 | =head1 DESCRIPTION | |
11 | ||
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12 | The B<last> function returns the UNIX timestamp of the most recent |
13 | update of the RRD. | |
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14 | |
15 | =over 8 | |
16 | ||
17 | =item I<filename> | |
18 | ||
19 | The name of the B<RRD> that contains the data. | |
20 | ||
5a00dc40 | 21 | =item B<--daemon>|B<-d> I<address> |
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22 | |
23 | Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent | |
24 | to the server before reading the RRD files. This allows B<rrdtool> to return | |
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25 | fresh data even if the daemon is configured to cache values for a long time. |
26 | For a list of accepted formats, see the B<-l> option in the L<rrdcached> manual. | |
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27 | |
28 | rrdtool last --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd | |
29 | ||
30 | =back | |
31 | ||
32 | =head1 ENVIRONMENT VARIABLES | |
33 | ||
34 | The following environment variables may be used to change the behavior of | |
35 | C<rrdtoolE<nbsp>last>: | |
36 | ||
37 | =over 4 | |
38 | ||
39 | =item B<RRDCACHED_ADDRESS> | |
40 | ||
41 | If this environment variable is set it will have the same effect as specifying | |
42 | the C<--daemon> option on the command line. If both are present, the command | |
43 | line argument takes precedence. | |
44 | ||
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45 | =back |
46 | ||
47 | =head1 AUTHOR | |
48 | ||
49 | Russ Wright <rwwright@home.com> | |
7fb9abb8 | 50 | Daemon support added by Steve Shipway <steve@steveshipway.org> |
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51 | |
52 |