[jbosscache-dev] new JDBC cache loader impl ready / final figures and design

[Mircea Markus]

Hi,

Attached is a comparison between old and new impl on JDBC cache loading.
Basically recursion was eliminated in the case of loadState and remove, and
the put had a 50% optimization. All other operation are more or less a
single db call, so nothing can really be programmatically improved.

The second image contains the design. Any comments are extremely welcomed :)
Nothing is committed yet on CVS.

An open issue is the backward compatibility - working on that.

Cheers,
Mircea

P.S.
How I've tested the performance (phps more easy to understand it from code
:-)
 a tree with a TREE_DEPTH depth is created. Each node in the tree has a
CHILDREN number of children. By default I've used TREE_DEPTH=7 and
CHILDREN=3 which gave a total number of 3280 children. A node is selected at
each depth from disjunct  subtrees.  ( i.e. in the benchmark used 7 nodes
are selected). On all those nodes a certain operation is performed:
loadState, remove etc. For benchmarking the put operation, the in memory
tree nodes are Collections.shuffle(List<Fqn>), then they are (randomly)
added to the database/classLoader.put. This procedure was repeated sever
times. Also additional testing was performed in the case of put for deep
trees (100 - 200 nodes)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/jbosscache-dev/attachments/20070202/103ab0b5/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: performance_comparison.PNG
Type: image/png
Size: 20682 bytes
Desc: not available
Url : http://lists.jboss.org/pipermail/jbosscache-dev/attachments/20070202/103ab0b5/attachment.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: design.png
Type: image/png
Size: 29034 bytes
Desc: not available
Url : http://lists.jboss.org/pipermail/jbosscache-dev/attachments/20070202/103ab0b5/attachment-0001.png