X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=NEWS;h=8741b7b91d5a8fb09f24ee5e0008914af12a0d68;hp=5497a671bc39f122c1484967171ef684873f5e6f;hb=d4110e29da41ce702bcc3327e86768c6f266915e;hpb=4d750c3e02acd806f8db83b4737afac2110cfa0f diff --git a/NEWS b/NEWS index 5497a67..8741b7b 100644 --- a/NEWS +++ b/NEWS @@ -1,164 +1,15 @@ RRDTOOL NEWS ============ -##################################### -Major Changes between 1.2.x and 1.3.x -------------------------------------- +########################################## +Functional Changes between 1.3.x and 1.4.x +------------------------------------------ -NEW Fast file access methods (Bernhard Fischer / Tobi Oetiker) ----------------------------- -* introduced file-accessor functions rrd_read/rrd_seek/rrd_write +RRDcached Accelerator +--------------------- +tbd -* 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full file-descriptor access instead of FILE* - access - -NEW Graphing (Tobi Oetiker) ------------- -* libart has been replaced by cairo/pango - -* pango markup is supported (--pango-markup) - -* full grid fitting - -* --graph-render-mode=mono for non anti aliased graphing - -*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. - - anti-aliased output - - alpha transparency support - - truetype fonts - -* additional graphics formats: EPS, PDF, SVG - -* extended multi-part documentation - -* VDEF support; define and use variables. Find, and use, the - maximum rate seen by rrdtool; compute and show the average - -* Sliding window (trend) analysis - Compute a smoother average, for instance over the last 6 CDPs - -* percentile (95th or other) - Remove peaks, 95 percent of all rates are at or below the - returned value - -Logging +RRDdump ------- -* a second logging interface: rrdtool updatev - Verbose updating of the database; show CPDs being created - -* Aberrant Behavior Detection with Holt-Winters Forecasting - Compare current data with expected data, detect and log when - the rates are outside expected levels - -* 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 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 - -* External libraries are not included with rrdtool anymore. This is in line - with todays trend of using shared libraries everywhere. With the exception - of the cgi library most things required by rrdtool will be found on every recent - system. - -* Memory Mapped IO support for faster logging. +* no more spaces in output +* --no-header replaced with --header {xsd,dtd}