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)
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
14 * implemented optional full file-descriptor access instead of FILE* access
16 Graphing (Tobi Oetiker)
18 * libart has been replaced by cairo/pango
19 * pango markup is supported
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)
29 * TEXTALIGN command to alter default text alignment behaviour
30 * C API supports in-memory graphing with rrd_graph_in_memory (Evan Miller)
32 Forecasting (Evan Miller)
34 * the new MHWPREDICT consolidation function uses a variation of the Holt-Winters
35 method. It is a drop-in replacement for HWPREDICT, and is better suited for
36 data whose seasonal variations grow or shrink in proportion to the average.
38 Locale Independent Input
39 ------------------------
40 * Regardles of locale you are in, rrdtool always expects input to be numbers (LC_NUMERIC)
41 in C or POSIX locale for numbers. (not 1,1 but 1.1) this is necessary to make
42 things like RPN work as it uses , as a separator.
46 Major Changes between 1.0.x and 1.2.x
51 * rewritten graphics generation based on libart.
53 - alpha transparency support
56 * additional graphics formats: EPS, PDF, SVG
58 * extended multi-part documentation
60 * VDEF support; define and use variables. Find, and use, the
61 maximum rate seen by rrdtool; compute and show the average
63 * Sliding window (trend) analysis
64 Compute a smoother average, for instance over the last 6 CDPs
66 * percentile (95th or other)
67 Remove peaks, 95 percent of all rates are at or below the
72 * a second logging interface: rrdtool updatev
73 Verbose updating of the database; show CPDs being created
75 * Aberrant Behavior Detection with Holt-Winters Forecasting
76 Compare current data with expected data, detect and log when
77 the rates are outside expected levels
79 * COMPUTE data type for artificial data-sources calculating their
80 input using RPN math and data from the other data-sources.
84 * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
86 * the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
87 without functionality.
89 * In pipe mode, rrdtool answers with OK only if it was successful with the
90 command. Otherwhise the answer will be ERROR...
95 * In order to support Holt-Winters and Calculated Datasources,
96 the rrdtool data format has changed. While the new version of rrdtool can
97 read files created with rrdtool 1.0.x. It is not possible to read files
98 created by rrdtool-1.2.x with rrdtool-1.0.x
100 * External libraries are not included with rrdtool anymore. This is in line
101 with todays trend of using shared libraries everywhere. With the exception
102 of the cgi library most things required by rrdtool will be found on every recent
105 * Memory Mapped IO support for faster logging.