[jboss-user] [JBoss Cache] Document updated/added: "Jbc210vsJbc220Performance"

[Manik Surtani]

User development,

The document "Jbc210vsJbc220Performance", was updated Feb 22, 2010
by Manik Surtani.

To view the document, visit:
http://community.jboss.org/docs/DOC-11066#cf

Document:
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h3.  Purpose of the benchmark
JBoss Cache 2.2.0 +Poblano+ comes with some changes in the product's architecture, through significant refactoring (see http://jbosscache.blogspot.com/2008/05/220-poblano-and-evolution-of-jboss.html on the subject for details). As the major driver behind these changes was code quality (unit testability, readability, etc.) and not performance, we wanted to analyze how performance was affected by such refactoring to ensure there were no regressions in performance, and hence this benchmark.  We were very pleasantly surprised.  
 
h3.  How the benchmarked was done
For benchmarking we used the CacheBenchmarkFramework. We run the http://anonsvn.jboss.org/repos/jbosscache/benchmarks/benchmark-fwk/trunk/src/org/cachebench/tests/SessionSimulatorTest.java
with the following configuration: 
* write percentage 20%
* read percentage 80%
* size of an attribute: 1000 bytes
* no of attributes in session: 100
* number of requests: 100,000
 
Following JBossCache configuration files were used for both versions tested (*2.2.0.BETA1 +Poblano+* and *2.1.0.GA +Alegrias+*)
* http://anonsvn.jboss.org/repos/jbosscache/benchmarks/benchmark-fwk/trunk/cache-products/jbosscache-2.2.0/conf/pess-repl-async-br.xml
* http://anonsvn.jboss.org/repos/jbosscache/benchmarks/benchmark-fwk/trunk/cache-products/jbosscache-2.2.0/conf/pess-repl-async.xml
* http://anonsvn.jboss.org/repos/jbosscache/benchmarks/benchmark-fwk/trunk/cache-products/jbosscache-2.2.0/conf/pess-repl-sync-br.xml
* http://anonsvn.jboss.org/repos/jbosscache/benchmarks/benchmark-fwk/trunk/cache-products/jbosscache-2.2.0/conf/pess-repl-sync.xml
 
Each configuration was run on a cluster varying from 2 to 10 nodes. Each node configuration was:
* OS: RHEL4
* Processor: Quad CPU, Intel(R) Xeon(TM) CPU 3.00GHz, cache 2048 KB
* Memory: total 4037392 kB
* Java: Java HotSpot(TM) Server VM (build 1.5.0_11-b03, mixed mode)
 
Test date: 1st May, 2008
 
h3.  Benchmark results
The results of the comparisons are in the attached graph. +Poblano+ outdoes +Alegrias+ in performance with following average increases (percents) 
* Pessimistic replication sync (buddy repl)  -  avg *+8.24% increase+*
* Pessimistic replication sync (total repl)  - avg *+11.92% increase+*
* Pessimistic replication async (buddy repl) - avg *+25.18% increase+*
* Pessimistic replication async (total repl) - avg *+34.91% increase+*
http://community.jboss.org/servlet/JiveServlet/download/11066-16-5185/jbc210_vs_jbc220.png
 
 

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