Changes between Version 10 and Version 11 of RRDtool13

Timestamp:

Jun 11, 2007, 5:33:38 PM (15 years ago)

Author:

oetiker

Comment:

--

RRDtool13

@@ -1 +1 @@
 = Features for RRDtool 1.3 =
 
-== Certain ==
+== Completed ==
 
- 1. Switch form libart to cairo for graph output (tobi)
- 1. Use posix_fadvise to drop cache and set read-ahead behaviour. This should give
-    us a beautiful performance boost in update time since cache use will be more efficient. (tobi)
- 1. Switch to mmap for IO all over the place (also using madvise instead of fadvise) (Bernhard)
- 1. Investigate and document file system performance tuning for rrdtool. (tobi)
+=== MMAP IO ===
+
+The whole IO subsystem has been redone by Bernhard Fisher. It can now uses
+MMAPed IO for all rrd file access.
+
+(Performance testing not done yet, but the load on the Kernel IO should be much lighter)
+
+=== Cairo/Pango ===
+
+No more libart, no more strange error messages about stability.
+The switch to Cairo makes for a number of neat new features:
+
+ * --graph-render-mode=mono brings back the rrdtool 1.0.x look and feel
+ * full grid-fitting of all drawing operations makes for crisper looking graph output
+   even when antialiasing is active
+
+We now use Pango for all text rendering. Pango integrates with Cairo, Freetype and Fontconfig. This has a number of implications:
+
+ * Fonts are accessed through the fontconfig interface. This means you get access
+   to all fonts on your system, and at the same time loose the ability to use truetype    
+   fonts directly.
+
+ * All text is passed through Pango Markup. This means it is now possible to switch
+   font properties inside any rrdtool graph text field.
+
+== Planned ==
+
  1. [wiki:RRDaccelerator rrdtool accelerator] inspired by Philippe Simonet (tobi)
  1. Architecture independent data format with xdr (tobi with help from Matt Massie)
@@ -13 +35 @@
  1. ALIGN:left|right|both function to alter the way rrdtool acts on encountering a full line. 
     At the moment it justifies the line which may not look good in all cases
- 1. Add method of specifying the 'outer-size' of the graph and not the size of the graphing area, as
-    proposed in the --full-size-mode patch.
-
+ 
 == Maybe ==