X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=NEWS;h=8741b7b91d5a8fb09f24ee5e0008914af12a0d68;hp=b1fa64b352d5193c411ef5251b3d274119431393;hb=d4110e29da41ce702bcc3327e86768c6f266915e;hpb=bbe14939aca831605f56753b1b0023ff46cad7b7 diff --git a/NEWS b/NEWS index b1fa64b..8741b7b 100644 --- a/NEWS +++ b/NEWS @@ -1,114 +1,15 @@ RRDTOOL NEWS ============ -Major Changes between 1.2.x and 1.3.x -see http://oss.oetiker.ch/rrdtool-trac/wiki/RRDtool13 -for up to date information +########################################## +Functional Changes between 1.3.x and 1.4.x +------------------------------------------ -File access methods (Bernhard Fischer) -------------------- -* 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 on - disk -* implemented optional full file-descriptor access instead of FILE* access +RRDcached Accelerator +--------------------- +tbd -Graphing (Tobi Oetiker) --------- -* libart has been replaced by cairo/pango -* pango markup is supported -* full gridfitting -* --graph-render-mode=mono for non antialiased graphing -* --font-render-mode=mono for non antialiased fonts -* fonts come through fontconfig, use the Pango fontnameing - scheme -> 'Times 20' ... it is not possible to use - truetype fonts directly anymore. -* Tabs are position independent. -* TRENDNAN filter that ignores NAN values while caculating 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 behaviour -* C API supports in-memory graphing with rrd_graph_in_memory (Evan Miller) - -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. - -Misc ----- -* ruby rrd_fetch will return step as a last property -- Mike Perham - -Incompatibility ---------------- -* If you create an RRD with the new MHWPREDICT function, the resulting rrdfile will - be version 0004 and can only be used in rrdtool 1.3. - -Locale Independent Input ------------------------- -* Regardles of locale you are in, rrdtool always expects input to be numbers (LC_NUMERIC) - in C or POSIX locale for numbers. (not 1,1 but 1.1) this is necessary to make - things like RPN work as it uses , as a separator. - -RRDTOOL NEWS -============ -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}