1 RRDTOOL NEWS
2 ============
3 Major Changes between 1.2.x and 1.3.x
5 see http://oss.oetiker.ch/rrdtool-trac/wiki/RRDtool13
6 for up to date information
8 File access methods (Bernhard Fischer)
9 -------------------
10 * introduced file-accessor functions rrd_read/rrd_seek/rrd_write
11 * implemented full mmap-based file access with madvise hints for improved
12 scalability, much reduced memory-footprint and much less blocking on
13 disk
14 * implemented optional full file-descriptor access instead of FILE* access
16 Graphing (Tobi Oetiker)
17 --------
18 * libart has been replaced by cairo/pango
19 * pango markup is supported
20 * full gridfitting
21 * --graph-render-mode=mono for non antialiased graphing
22 * --font-render-mode=mono for non antialiased fonts
23 * fonts come through fontconfig, use the Pango fontnameing
24 scheme -> 'Times 20' ... it is not possible to use
25 truetype fonts directly anymore.
26 * Tabs are position independent.
27 * TRENDNAN filter that ignores NAN values while caculating the TREND data. (Timo Stripf)
28 * --full-size-mode to specify the outer border of the image and not just of the graphing canvas (Matthew Chambers)
30 RRDTOOL NEWS
31 ============
32 Major Changes between 1.0.x and 1.2.x
34 Graphing
35 --------
37 * rewritten graphics generation based on libart.
38 - anti-aliased output
39 - alpha transparency support
40 - truetype fonts
42 * additional graphics formats: EPS, PDF, SVG
44 * extended multi-part documentation
46 * VDEF support; define and use variables. Find, and use, the
47 maximum rate seen by rrdtool; compute and show the average
49 * Sliding window (trend) analysis
50 Compute a smoother average, for instance over the last 6 CDPs
52 * percentile (95th or other)
53 Remove peaks, 95 percent of all rates are at or below the
54 returned value
56 Logging
57 -------
58 * a second logging interface: rrdtool updatev
59 Verbose updating of the database; show CPDs being created
61 * Aberrant Behavior Detection with Holt-Winters Forecasting
62 Compare current data with expected data, detect and log when
63 the rates are outside expected levels
65 * COMPUTE data type for artificial data-sources calculating their
66 input using RPN math and data from the other data-sources.
68 Incompatibilities
69 -----------------
70 * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
72 * the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
73 without functionality.
75 * In pipe mode, rrdtool answers with OK only if it was successful with the
76 command. Otherwhise the answer will be ERROR...
79 Behind the Scenes
80 -----------------
81 * In order to support Holt-Winters and Calculated Datasources,
82 the rrdtool data format has changed. While the new version of rrdtool can
83 read files created with rrdtool 1.0.x. It is not possible to read files
84 created by rrdtool-1.2.x with rrdtool-1.0.x
86 * External libraries are not included with rrdtool anymore. This is in line
87 with todays trend of using shared libraries everywhere. With the exception
88 of the cgi library most things required by rrdtool will be found on every recent
89 system.
91 * Memory Mapped IO support for faster logging.