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18 * libart has been replaced by cairo/pango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.
40 * If you create an RRD with the new MHWPREDICT function, the resulting rrdfile will
41 be version 0004 and can only be used in rrdtool 1.3.
43 Locale Independent Input
44 ------------------------
45 * Regardles of locale you are in, rrdtool always expects input to be numbers (LC_NUMERIC)
46 in C or POSIX locale for numbers. (not 1,1 but 1.1) this is necessary to make
47 things like RPN work as it uses , as a separator.
51 Major Changes between 1.0.x and 1.2.x
56 * rewritten graphics generation based on libart.
58 - alpha transparency support
61 * additional graphics formats: EPS, PDF, SVG
63 * extended multi-part documentation
65 * VDEF support; define and use variables. Find, and use, the
66 maximum rate seen by rrdtool; compute and show the average
68 * Sliding window (trend) analysis
69 Compute a smoother average, for instance over the last 6 CDPs
71 * percentile (95th or other)
72 Remove peaks, 95 percent of all rates are at or below the
77 * a second logging interface: rrdtool updatev
78 Verbose updating of the database; show CPDs being created
80 * Aberrant Behavior Detection with Holt-Winters Forecasting
81 Compare current data with expected data, detect and log when
82 the rates are outside expected levels
84 * COMPUTE data type for artificial data-sources calculating their
85 input using RPN math and data from the other data-sources.
89 * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash
91 * the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but
92 without functionality.
94 * In pipe mode, rrdtool answers with OK only if it was successful with the
95 command. Otherwhise the answer will be ERROR...
100 * In order to support Holt-Winters and Calculated Datasources,
101 the rrdtool data format has changed. While the new version of rrdtool can
102 read files created with rrdtool 1.0.x. It is not possible to read files
103 created by rrdtool-1.2.x with rrdtool-1.0.x
105 * External libraries are not included with rrdtool anymore. This is in line
106 with todays trend of using shared libraries everywhere. With the exception
107 of the cgi library most things required by rrdtool will be found on every recent
110 * Memory Mapped IO support for faster logging.