RRDTOOL NEWS ============ Major Changes between 1.2.x and 1.3.x see http://oss.oetiker.ch/rrdtool-trac/wiki/RRDtool13 for up to date information File access methods (Bernhard Fischer) ------------------- * introduced file-accessor functions rrd_read/rrd_seek/rrd_write * implemented full mmap-based file access with madvise hints for improved scalability, much reduced memory-footprint and much less blocking on disk * implemented optional full file-descriptor access instead of FILE* access Graphing (Tobi Oetiker) -------- * libart has been replaced by cairo/pango * pango markup is supported * full gridfitting * --graph-render-mode=mono for non antialiased graphing * --font-render-mode=mono for non antialiased fonts * fonts come through fontconfig, use the Pango fontnameing scheme -> 'Times 20' ... it is not possible to use truetype fonts directly anymore. * Tabs are position independent. * TRENDNAN filter that ignores NAN values while caculating the TREND data. (Timo Stripf) * --full-size-mode to specify the outer border of the image and not just of the graphing canvas (Matthew Chambers) RRDTOOL NEWS ============ Major Changes between 1.0.x and 1.2.x Graphing -------- * rewritten graphics generation based on libart. - anti-aliased output - alpha transparency support - truetype fonts * additional graphics formats: EPS, PDF, SVG * extended multi-part documentation * VDEF support; define and use variables. Find, and use, the maximum rate seen by rrdtool; compute and show the average * Sliding window (trend) analysis Compute a smoother average, for instance over the last 6 CDPs * percentile (95th or other) Remove peaks, 95 percent of all rates are at or below the returned value Logging ------- * a second logging interface: rrdtool updatev Verbose updating of the database; show CPDs being created * Aberrant Behavior Detection with Holt-Winters Forecasting Compare current data with expected data, detect and log when the rates are outside expected levels * COMPUTE data type for artificial data-sources calculating their input using RPN math and data from the other data-sources. Incompatibilities ----------------- * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash * the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but without functionality. * In pipe mode, rrdtool answers with OK only if it was successful with the command. Otherwhise the answer will be ERROR... Behind the Scenes ----------------- * In order to support Holt-Winters and Calculated Datasources, the rrdtool data format has changed. While the new version of rrdtool can read files created with rrdtool 1.0.x. It is not possible to read files created by rrdtool-1.2.x with rrdtool-1.0.x * External libraries are not included with rrdtool anymore. This is in line with todays trend of using shared libraries everywhere. With the exception of the cgi library most things required by rrdtool will be found on every recent system. * Memory Mapped IO support for faster logging.