From 8d6912995d9641a27ef051ad4234883c89464ca0 Mon Sep 17 00:00:00 2001 From: oetiker Date: Tue, 27 Oct 2009 13:57:59 +0000 Subject: [PATCH] updated for 1.4 release git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1951 a5681a0c-68f1-0310-ab6d-d61299d08faa --- NEWS | 178 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 172 insertions(+), 6 deletions(-) diff --git a/NEWS b/NEWS index d13a76a..6648d63 100644 --- a/NEWS +++ b/NEWS @@ -1,5 +1,6 @@ -News for RRDtool 1.4 -==================== +##################################### +Major Changes between 1.3.x and 1.4.x +------------------------------------- $Id$ RRD Caching Daemon (rrdcached) @@ -7,7 +8,7 @@ RRD Caching Daemon (rrdcached) by Florian Forster and Kevin Brintnall The RRD Caching Daemon can dramatically improve the 'update' performance -of your system. Due to filehandling overheads, the time it takes todo one +of your system. Due to file handling overheads, the time it takes todo one update is virtually the same as to doing two updates in a row. The Cache Daemon intercepts rrdtool update calls, assembling multiple @@ -25,8 +26,9 @@ existing xml parsers. The restore core has been completely re-written yet again and is now relying on an incremental xml parser. This has the advantage that the memory -consumtion while restoring xml files is only slighly larger than the -resulting rrd file. Which is much less than the requirements of the 1.3. +consumption while restoring xml files is only slightly larger than the +resulting rrd file. Which is much less than the requirements of the 1.3 and +even 1.2 RRD Graphing functions (rrdtool graph) -------------------------------------- @@ -43,7 +45,6 @@ by Martin Sperl Miscellaneous Changes --------------------- - * graph legends can now be placed left, right or above the graph with the new --legend-direction and --legend-positon placement options. by Melchior Rabe @@ -55,6 +56,9 @@ Miscellaneous Changes * switched from intltoolize to autopoint for the i18n configuration. by Tobi Oetiker +* new graph option --grid-dash on:off to configure the dash length + in the grid painted over the graph by Tobi Oetiker + * lua bindings for rrdtool by Fidelis Assis @@ -71,3 +75,165 @@ Miscellaneous Changes graph by Loïc Tortay for more detail see the CHANGES file. + +##################################### +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 naming scheme + -> 'Times 20' ... it is not possible to use true-type 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 +------- +* 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. -- 2.11.0