1 RRDTOOL NEWS
2 ============
3 Major Changes between 1.0.x and 1.2.x
5 Graphing
6 --------
8 * rewritten graphics generation based on libart.
9 - anti-aliased output
10 - alpha transparency support
11 - truetype fonts
13 * additional graphics formats: EPS, PDF, SVG
15 * extended multi-part documentation
17 * VDEF support; define and use variables. Find, and use, the
18 maximum rate seen by rrdtool; compute and show the average
20 * Sliding window (trend) analysis
21 Compute a smoother average, for instance over the last 6 CDPs
23 * percentile (95th or other)
24 Remove peaks, 95 percent of all rates are at or below the
25 returned value
27 Logging
28 -------
29 * a second logging interface: rrdtool updatev
30 Verbose updating of the database; show CPDs being created
32 * Aberrant Behavior Detection with Holt-Winters Forecasting
33 Compare current data with expected data, detect and log when
34 the rates are outside expected levels
36 * COMPUTE data type for artificial data-sources calculating their
37 input using RPN math and data from the other data-sources.
39 Incompatibilities
40 -----------------
41 * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
43 Behind the Scenes
44 -----------------
45 * In order to support Holt-Winters and Calculated Datasources,
46 the rrdtool data format has changed. While the new version of rrdtool can
47 read files created with rrdtool 1.0.x. It is not possible to read files
48 created by rrdtool-1.2.x with rrdtool-1.0.x
50 * External libraries are not included with rrdtool anymore. This is in line
51 with todays trend of using shared libraries everywhere. With the exception
52 of the cgi library most things required by rrdtool will be found on every recent
53 system.
55 * Memory Mapped IO support for faster logging.