(PECL rrd >= 0.9.0)
rrd_tune — Tunes some RRD database file header options.
Change some options in the RRD dabase header file. E.g. renames the source for the the data etc.
RRD database file name.
Options with RRD database file properties which will be changed. See rrd tune man page for details.
Returns TRUE on success, FALSE otherwise.