1 RRDTOOL NEWS
2 ============
3 Major Changes between 1.2.x and 1.3.x
5 File access methods
6 -------------------
7 * introduced file-accessor functions rrd_read/rrd_seek/rrd_write
8 * implemented full mmap-based file access with madvise hints for improved
9 scalability, much reduced memory-footprint and much less blocking on
10 disk
11 * implemented optional full file-descriptor access instead of FILE* access
13 Graphing
14 --------
15 * libart has been replaced by cairo/pango
16 * pango markup is supported
17 * full gridfitting
19 RRDTOOL NEWS
20 ============
21 Major Changes between 1.0.x and 1.2.x
23 Graphing
24 --------
26 * rewritten graphics generation based on libart.
27 - anti-aliased output
28 - alpha transparency support
29 - truetype fonts
31 * additional graphics formats: EPS, PDF, SVG
33 * extended multi-part documentation
35 * VDEF support; define and use variables. Find, and use, the
36 maximum rate seen by rrdtool; compute and show the average
38 * Sliding window (trend) analysis
39 Compute a smoother average, for instance over the last 6 CDPs
41 * percentile (95th or other)
42 Remove peaks, 95 percent of all rates are at or below the
43 returned value
45 Logging
46 -------
47 * a second logging interface: rrdtool updatev
48 Verbose updating of the database; show CPDs being created
50 * Aberrant Behavior Detection with Holt-Winters Forecasting
51 Compare current data with expected data, detect and log when
52 the rates are outside expected levels
54 * COMPUTE data type for artificial data-sources calculating their
55 input using RPN math and data from the other data-sources.
57 Incompatibilities
58 -----------------
59 * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
61 * the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
62 without functionality.
64 * In pipe mode, rrdtool answers with OK only if it was successful with the
65 command. Otherwhise the answer will be ERROR...
68 Behind the Scenes
69 -----------------
70 * In order to support Holt-Winters and Calculated Datasources,
71 the rrdtool data format has changed. While the new version of rrdtool can
72 read files created with rrdtool 1.0.x. It is not possible to read files
73 created by rrdtool-1.2.x with rrdtool-1.0.x
75 * External libraries are not included with rrdtool anymore. This is in line
76 with todays trend of using shared libraries everywhere. With the exception
77 of the cgi library most things required by rrdtool will be found on every recent
78 system.
80 * Memory Mapped IO support for faster logging.