-RRDTOOL NEWS
-============
-
-
-In this file I am noting the Major changes to rrdtool
-for details check the cvs ChangeLog
-
-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
+News for RRDtool 1.4
+====================
+$Id$
+
+RRD Caching Daemon (rrdcached)
+------------------------------
+by Florian Forster and Kevin Brintnall
+
+The RRD Caching Daemon can dramatically improve the 'update' performance
+of your system. Due to filehandling overheads, the time it takes todo one
+update is virtually the same as to doing two updates in a row.
+
+The Cache Daemon intercepts rrdtool update calls, assembling multiple
+updates before writing them to the actual rrd file. When calling rrdtool
+graph in such a setup, the command will tell the daemon to flush out all
+pending updates for the rrd files, required to draw the graph.
+
+
+RRD Dumping and Restoring (rrdtool dump/restore)
+------------------------------------------------
+by Tobi Oetiker
+
+The output of rrdtool dump has been adjusted to be simpler to parse by
+existing xml parsers.
+
+The restore core has been completely re-written yet again and is now relying
+on an incremental xml parser. This has the advantage that the memory
+consumtion while restoring xml files is only slighly larger than the
+resulting rrd file. Which is much less than the requirements of the 1.3.
+
+RRD Graphing functions (rrdtool graph)
+--------------------------------------
+by Martin Sperl
+
+* VDEF PERCENTNAN (a PRECENT that ignores NAN)
+
+* CDEF PREDICT and PREDICTSIGMA functions for on-the-fly
+ data prediction without the need to modify existing rrd files as it is
+ required for HoltWinters.
+
+* LibDBI integration provides a path to read data directly of a supported
+ SQL database into rrdtool graph.
+
+Miscellaneous Changes
+---------------------
+
+* graph legends can now be placed left, right or above the graph with the
+ new --legend-direction and --legend-positon placement options.
+ by Melchior Rabe
+
+* switched to using automake 1.11 which provides a 'silent' build process,
+ causing errors and warnings to stand out much more than before.
+ by Tobi Oetiker
+
+* switched from intltoolize to autopoint for the i18n configuration.
+ by Tobi Oetiker
+
+* lua bindings for rrdtool
+ by Fidelis Assis
+
+* various improvements to rrd_open functions and mmap handling
+ by Daniel Pocock
+
+* allow the HW smoothing window size to be set to 0 with rrdtool tune
+ by sylvain luiset
+
+for more detail see the CHANGES file.
projects / rrdtool.git / blobdiff