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+* libart has been replaced by cairo/pango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.
+ - 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
-------
-* In addition to the PNG format, rrdtool
- can produce output in SVN, EPS and PDF format.
+* 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 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
of the cgi library most things required by rrdtool will be found on every recent
system.
-
- Configure and Makefiles and accordingly.
-
-2002/03/26 Peter Speck <speck@ruc.dk>
- Contribution of an svg output routine for the new gfx graphing part
-
-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
-
-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
-
-2001/07/26 Alex van den Bogaerdt <alex@ergens.op.Het.Net>
- Added TOTAL to the VDEF functions.
-
-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.
-
-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
-
-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
+* Memory Mapped IO support for faster logging.
projects / rrdtool.git / blobdiff