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 cvs ChangeLog
-
-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.
+* rewritten graphics generation based on libart.
+ - anti-aliased output
+ - alpha transparency support
+ - truetype fonts
-
-2001/03/07 Tobias Oetiker <oetiker@ee.ethz.ch>
- Integrated complete rewrite
- of rrdgraph documentation by Alex van den Bogaerdt
- <alex@slot.hollandcasino.nl>. This also contains info on his planned
- changes to the rrdgraph module
-
-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.
+* 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.
- 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
+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.
+
+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.
projects / rrdtool.git / blobdiff