RRDTOOL NEWS
============
+Major Changes between 1.0.x and 1.2.x
+Graphing
+--------
-In this file I am noting the major changes to RRDtool
-for details check the svn ChangeLog
+* rewritten graphics generation based on libart.
+ - anti-aliased output
+ - alpha transparency support
+ - truetype fonts
+
+* additional graphics formats: EPS, PDF, SVG
+
+* extended multi-part documentation
-2005/04/04 Tobi Oetiker <tobi@oetiker.ch>
- After adding lots of patches and doing a
- autotools update we are ready for 1.2rc1
+* VDEF support; define and use variables. Find, and use, the
+ maximum rate seen by rrdtool; compute and show the average
-2004/01/20 Tobi Oetiker <tobi@oetiker.ch>
- Ripped out all foreign libraries and adapted
- Configure and Makefiles and accordingly.
+* Sliding window (trend) analysis
+ Compute a smoother average, for instance over the last 6 CDPs
-2002/03/26 Peter Speck <speck@ruc.dk>
- Contribution of an svg output routine for the new gfx graphing part
+* percentile (95th or other)
+ Remove peaks, 95 percent of all rates are at or below the
+ returned value
-2002/03/23 Alex van den Bogaerdt <alex@ergens.op.Het.Net>
- Several visible changes made to rrd_graph
- * Pie chart support workable
- * Elements that are not used do not take up space on the img
- * Hack for the missing rotated text (see --vertical-label)
- * Tiny boxes in front of labels now scale with the text
+Logging
+-------
+* a second logging interface: rrdtool updatev
+ Verbose updating of the database; show CPDs being created
-2002/01/15 Tobias Oetiker <tobi@oetiker.ch>
- The BIG graph update
- * Replace libgd with libart
- * Added freetype
- * Updated zlib and libpng
- * rrd_gfx.c intrduced as libart wrapper
- * LINE takes now a float as argument
- * RRDtool uses truetype for fonts
- * thanks to libart there is now full alpha transparenc
- and antialiasing.
- * the new option --font lets customize the font
- and size for various graph elements
- * Updated to -> libtool 1.4.2 automake 2.12 autoconf 2.52
- * new --zoom commandline option for zoom ans shrinking
- ---- Still missing is rotatet text for the yaxis description
- ---- Still missing is tab support in the text rendere
- ---- Still missing is autoconf support for a default truetype font
+* Aberrant Behavior Detection with Holt-Winters Forecasting
+ Compare current data with expected data, detect and log when
+ the rates are outside expected levels
-2001/07/26 Alex van den Bogaerdt <alex@ergens.op.Het.Net>
- Added TOTAL to the VDEF functions.
+* 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
-2001/07/19 Alex van den Bogaerdt <alex@ergens.op.Het.Net>
- VDEF support. This is a variable containing one value
- and a time component. This type of variable can hold
- the result of a function over a complete time series
- of data (DEF or CDEF) such as the maximum seen, and when.
+* the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
+ without functionality.
-2001/03/10 Jake Brutlag <jakeb@corp.webtv.net>
- Support for COMPUTE data sources (CDEF data sources). Removes the RPN
- parser and calculator from rrd_graph and puts then in a new file,
- rrd_rpncalc.c. Changes to core files rrd_create and rrd_update. Some
- clean-up of aberrant behavior stuff, including a bug fix.
- Documentation update (rrdcreate.pod, rrdupdate.pod). Change xml format.
-
-2001/03/07 Tobias Oetiker <oetiker@ee.ethz.ch>
- Integrated complete rewrite
- of rrdgraph documentation by Alex van den Bogaerdt
- <alex@ergens.op.Het.Net>. This also contains info on his planned
- changes to the rrdgraph module
+* In pipe mode, rrdtool answers with OK only if it was successful with the
+ command. Otherwhise the answer will be ERROR...
-2001/03/02 Tobias Oetiker <oetiker@ee.ethz.ch>
- Added Aberrant Patch from Jake Brutlag <jakeb@microsoft.com>
- From now one, new rrd files use version tag 0002. They can
- NOT be read by the old 1.0.x RRDtools.
-
- Jake:
- Aberrant Behavior Detection support. A brief overview added to
- rrdtool.pod. Major updates to rrd_update.c, rrd_create.c. Minor update to
- other core files. Updated documentation: rrdcreate.pod, rrdgraph.pod,
- rrdtune.pod. This is backwards compatible (i.e. new tool can read and will
- leave the binary header unchanged for old files).
- See http://cricket.sourceforge.net/aberrant/rrd_hw.htm
+
+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.