X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=NEWS;h=bac4d122f5355cb68899a4dc4c0d99582227148b;hp=542783b817c4c57019adf1e379fe8cb1d9588dac;hb=596355adbe6bbedc736543e7735c2adfeccd7b7e;hpb=3ed92922bd53dc6d96188aed796e584ec624e4cf diff --git a/NEWS b/NEWS index 542783b..bac4d12 100644 --- a/NEWS +++ b/NEWS @@ -1,53 +1,185 @@ -RRDTOOL NEWS -============ -Major Changes between 1.2.x and 1.3.x +##################################### +Major Changes between 1.3.x and 1.4.x +------------------------------------- +$Id$ + +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 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 +updates before writing them to the actual rrd file. When calling rrdtool +graph in such a setup, the command will tell the daemon to flush out all +pending updates for the rrd files, required to draw the graph. + +See rrdcached documentation. + +RRD Dumping and Restoring (rrdtool dump/restore) +------------------------------------------------ +by Tobi Oetiker + +The output of rrdtool dump has been adjusted to be simpler to parse by +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 +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) +-------------------------------------- +by Martin Sperl + +* VDEF PERCENTNAN (a PRECENT that ignores NAN) + +* CDEF PREDICT and PREDICTSIGMA functions for on-the-fly + data prediction without the need to modify existing rrd files as it is + required for HoltWinters. + +* LibDBI integration provides a path to read data directly of a supported + SQL database into rrdtool graph. See rrdgraph_libdbi documentation. + +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 -see http://oss.oetiker.ch/rrdtool-trac/wiki/RRDtool13 -for up to date information +* switched to using automake 1.11 which provides a 'silent' build process, + causing errors and warnings to stand out much more than before. + by Tobi Oetiker -File access methods (Bernhard Fischer) -------------------- +* 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 + +* various improvements to rrd_open functions and mmap handling + by Daniel Pocock + +* allow the HW smoothing window size to be set to 0 with rrdtool tune + by sylvain luiset + +* new graph option --border to set the 3d border width + by Bernhard Reutner-Fischer + +* draw different color markers (enable with --dynamic-labels) depending on the + type of element in the 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 on - disk -* implemented optional full file-descriptor access instead of FILE* access -Graphing (Tobi Oetiker) --------- +* 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 -* 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. + +* 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 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. - -* Due to the new aggregation function, we also get a new version of the - rrd file format. - -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 +* 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 --------