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+=head1 NAME
+
+rrdrados - Creating, updating and retrieving RRD files from Ceph
+
+=head1 SYNOPSIS
+
+E<lt>rrdfileE<gt> = B<ceph//E<lt>nameE<gt>>
+
+
+=head1 DESCRIPTION
+
+This module adds support for creating, updating and retrieving RRD files
+directly from a Ceph cluster using librados.
+
+It adds a ceph// prefix to RRD file name which is used to instruct rrdtool to
+operate on a file that is stored in Ceph.
+
+Currently the module expects to find the Ceph configuration file in the default
+location at /etc/ceph/ceph.conf. By default it uses Ceph client ID "admin" and a
+Ceph pool named "rrd".
+
+
+=head1 ENVIRONMENT VARIABLES
+
+=over 4
+
+=item B<CEPH_ID>
+
+Sets the Ceph Client ID to use when connecting. By default the client ID "admin"
+is used.
+
+=item B<CEPH_POOL>
+
+Sets the name of the Ceph Pool to connect to. By default, the pool "rrd" is
+used.
+
+=back
+
+
+=head1 EXAMPLES
+
+B<Creating an RRD file on Ceph>
+
+ rrdtool create ceph//temperature.rrd --step 300 \
+   DS:temp:GAUGE:600:-273:5000 \
+   RRA:AVERAGE:0.5:1:1200 \
+   RRA:MIN:0.5:12:2400 \
+   RRA:MAX:0.5:12:2400 \
+   RRA:AVERAGE:0.5:12:2400
+
+
+B<Importing an existing RRD into Ceph>
+
+ rrdtool dump existing.rrd | rrdtool restore - ceph//new.rrd
+
+Or you could also copy the RRD file directly into Ceph using the rados command
+line utility.
+
+
+B<Retrieving RRD data from Ceph>
+
+ rrdtool fetch ceph//file.rrd AVERAGE
+
+
+=head1 AUTHOR
+
+Simon Boulet E<lt>simon@nostalgeek.comE<gt>
+