X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=NEWS;h=5497a671bc39f122c1484967171ef684873f5e6f;hp=355362104d3589aab39a72a38e132c89ef03eb10;hb=4d750c3e02acd806f8db83b4737afac2110cfa0f;hpb=990fcfb7eec407edfe504f42760bae204e1c074d diff --git a/NEWS b/NEWS index 3553621..5497a67 100644 --- a/NEWS +++ b/NEWS @@ -1,18 +1,120 @@ RRDTOOL NEWS ============ -Major Changes between 1.0.x and 1.2.x +##################################### +Major Changes between 1.2.x and 1.3.x +------------------------------------- + +NEW Fast file access methods (Bernhard Fischer / Tobi Oetiker) +---------------------------- +* introduced file-accessor functions rrd_read/rrd_seek/rrd_write + +* implemented full mmap-based file access with madvise hints for + improved scalability, much reduced memory-footprint and much less + blocking while accessing the disk + +* implemented optional full file-descriptor access instead of FILE* + access + +NEW Graphing (Tobi Oetiker) +------------ +* libart has been replaced by cairo/pango + +* pango markup is supported (--pango-markup) + +* full grid fitting + +* --graph-render-mode=mono for non anti aliased graphing + +* --font-render-mode=mono for non anti aliased fonts + +* fonts come through fontconfig, use the Pango font nameing scheme + -> 'Times 20' ... it is not possible to use truetype fonts + directly anymore. + +* Tabs are position independent. + +* TRENDNAN filter that ignores NAN values while calculating the + TREND data. (Timo Stripf) + +* --full-size-mode to specify the outer border of the image and not + just of the graphing canvas (Matthew Chambers) + +* TEXTALIGN command to alter default text alignment behavior + +* C API in-memory graphing with rrd_graph_v (Evan Miller) + +* draw dashed lines in graphs (Thomas Gutzler) + +* new interface graphv which returns information using the rrd_info + interface (Tobi Oetiker and Mark Plaksin) + +* improved horizontal grid. Have a bit more grid lines and y-axis + labels while keeping them far enough apart to not run into each + other. + +NEW Forecasting (Evan Miller) +--------------- +* the new MHWPREDICT consolidation function uses a variation of the + Holt-Winters method. It is a drop-in replacement for HWPREDICT, + and is better suited for data whose seasonal variations grow or + shrink in proportion to the average. + +* If you create an RRD with the new MHWPREDICT function, the + resulting rrd file will be version 0004 and can only be used in + rrdtool 1.3. + +Rewrites +-------- +* rrd_restore now uses libxml for parsing which makes things much + more tolerant towards xml variations. The old code could mostly + just parse the XML as it was output by rrdtool dump. See also: + the note at the bottom of this document. (by Florian octo + Forster) + +* rrd_update rewritten to make it more modular. Fixed two + longstanding HW bugs in the process (Evan Miller) + +Internationalization (Takao Fujiwara and Tobi Oetiker) +-------------------- +* The help output by rrdtool has been internationalized. There are + no real translations included with rrdtool yet, contributions are + welcome. + +* The internationalization will only be compiled if libintl and + friends are available on your system. Use the configure option + --disable-libintl if you want to disable this feature + +Language Bindings +----------------- +* ruby rrd_fetch will return step as a last property -- Mike Perham + +RRDtool dump / restore incompatibility +-------------------------------------- +* rrdtool dump 1.3 does emit completely legal XML. Basically this + means that it contains an XML header and a DOCTYPE definition. + Unfortunately this causes older versions of rrdtool restore to be + unhappy. + +* To restore a new dump with an old rrdtool restore version, either + remove the XML header and the doctype by hand (both on the first + line of the dump) or use rrdtool dump --no-header. + + +###################################################################################### +Major Changes between 1.0.x and 1.2.x +====================================================================================== Graphing -------- * rewritten graphics generation based on libart. - - antialiased output + - anti-aliased output - alpha transparency support - truetype fonts * additional graphics formats: EPS, PDF, SVG -* extended multipart documentation +* extended multi-part documentation * VDEF support; define and use variables. Find, and use, the maximum rate seen by rrdtool; compute and show the average @@ -33,17 +135,24 @@ Logging Compare current data with expected data, detect and log when the rates are outside expected levels -* COMPUTE datatype for artificial datasources calculating their - input using RPN math and data from the other datasources. +* COMPUTE data type for artificial data-sources calculating their + input using RPN math and data from the other data-sources. Incompatibilities ----------------- * Colons in COMMENT arguments to rrdtool graph must be escaped with a backslash +* the --alt-y-mrtg option is gone or rather since 1.2.7 it is back but + without functionality. + +* In pipe mode, rrdtool answers with OK only if it was successful with the + command. Otherwhise the answer will be ERROR... + + Behind the Scenes ----------------- * In order to support Holt-Winters and Calculated Datasources, - the rrdtool dataformat has changed. While the new version of rrdtool can + the rrdtool data format has changed. While the new version of rrdtool can read files created with rrdtool 1.0.x. It is not possible to read files created by rrdtool-1.2.x with rrdtool-1.0.x