-The B<flush> function connects to L<rrdcached>, the RRD caching daemon, and
-issues a "flush" command for the given file. The daemon will put this file to
-the head of the update queue so it is written "soon". The status will be
-returned only after the file's pending updates have been written to disk.
+The B<flush> function connects to L<rrdcached>, the RRD caching daemon,
+and issues a "flush" command for the given files. The daemon will put the
+files to the head of the update queue so they are written "soon". The
+status will be returned only after the files' pending updates have been
+written to disk.