X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=NEWS;h=2d2abf789e59bb12c268f2dacf9fe3f8911bb480;hb=24eb52a1de05ac84f0fd8e39a53b8e38691b94d6;hp=7adfad05e002551d2586d4a971a9ea5968662beb;hpb=b7c278771851b0dfad0daf1c817fbc93316ef96e;p=rrdtool.git diff --git a/NEWS b/NEWS index 7adfad0..2d2abf7 100644 --- a/NEWS +++ b/NEWS @@ -1,25 +1,140 @@ RRDTOOL NEWS ============ +Major Changes between 1.2.x and 1.3.x -x +RRdtool dump / restore Incompatibilities +---------------------------------------- +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. -In this file I am noting the Major changes to rrdtool -for details check the cvs ChangeLog +To restore a new dump with ann 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. -2001/03/07 Tobias Oetiker - Integrated complete rewrite of rrdgraph documentation by - Alex van den Bogaerdt . THis also contains - info on his planned changes to the rrdgraph module +NEW 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 -2001/03/02 Tobias Oetiker - Added Aberrant Patch from Jake Brutlag - From now one, new rrd files use version tag 0002. They can - NOT be read by the old 1.0.x rrdtools +NEW Graphing (Tobi Oetiker) +-------- +* libart has been replaced by cairo/pango +* pango markup is supported +* full gridfitting +* --graph-render-mode=mono for non antialiased graphing +* --font-render-mode=mono for non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 in-memory graphing with rrd_graph_v (Evan Miller) +* draw dashed lines in graphs (Thomas Gutzler) +* new interface graphv which returns inforamation using the rrd_info + interface (Tobi Oetiker and Mark Plaksin) - Jack: - Aberrant Behavior Detection support. A brief overview added to - rrdtool.pod. Major updates to rrd_update.c, rrd_create.c. Minor update to - other core files. Updated documentation: rrdcreate.pod, rrdgraph.pod, - rrdtune.pod. This is backwards compatible! See - http://cricket.sourceforge.net/aberrant/rrd_hw.htm +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 + rrdfile 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: 'incompatibilities' at the + top 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 + +Misc +---- +* ruby rrd_fetch will return step as a last property -- Mike Perham + +Locale Independent Numeric 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 +------- +* 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.