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+* libart has been replaced by cairo/pango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)
+* TEXTALIGN command to alter default text alignment behaviour
+* C API supports in-memory graphing with rrd_graph_in_memory (Evan Miller)
+
+Forecasting (Evan Miller)
+-----------
+* the new MHWPREDICT consolidation function uses a variation of the Holt-Winters
+ method. It is a drop-in replacement for HWPREDICT, and is better suited for
+ data whose seasonal variations grow or shrink in proportion to the average.
+
+
+RRDTOOL NEWS
+============
Major Changes between 1.0.x and 1.2.x
Graphing
--------
* rewritten graphics generation based on libart.
- - antialiased output
+ - anti-aliased output
- alpha transparency support
- truetype fonts
* additional graphics formats: EPS, PDF, SVG
-* extended multipart documentation
+* extended multi-part documentation
* VDEF support; define and use variables. Find, and use, the
maximum rate seen by rrdtool; compute and show the average
Compare current data with expected data, detect and log when
the rates are outside expected levels
-* COMPUTE datatype for artificial datasources calculating their
- input using RPN math and data from the other datasources.
+* 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 dataformat has changed. While the new version of rrdtool can
+ 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
projects / rrdtool.git / blobdiff