Hi,
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On 5/18/05, Paulo Neves <[EMAIL PROTECTED]> wrote:
> Hi ben,
>
> This morning I get all code from CVS and do my tests.
>
> > A good improvement, but the
> > similarity of the original execution times between Dianne and Marissa
> > has me confused as to why your results reported a major difference in
> > execution time between them.
>
> Well, this occur because Marissa in my other test had access to all
> contacts, and dianne only have access to 4 or 5 contacts (I change
> that in code, sorry if I don't sayd that);
>
> > As an aside, I wouldn't generally be encouraging people to return 10,000
> > elements inside a Collection and then expect the ACL package to filter
> > out all but 4 or 5 items. That sort of thing is an abuse of an RDBMS
> > platform's inbuilt capabilities! :-) Still, we should aim to optimise
> > the Java code as greatly as possible, so I am happy to explore this
> > benchmarking and squeeze better performance out of it.
>
> I agree with you :), but my test only have the purpose to see
> scalability and optimize any code for extreme situation.
>
>
> And now, my tests that I had done this morning:
> 1º I change DataSourcePopulator to populate permissions on all
> contacts to user scott.
>
> template.execute("INSERT INTO acl_permission VALUES (null, "
> + i + ", 'scott',"+permission+");");
>
> 2º I run tests and create a table with execution times ( see TemposAcegi.pdf )
>
> Note: To use cache I change
> applicationContext-common-authorization.xml with following:
>
> <bean id="aclCacheManager"
> class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"/>
>
> <bean id="aclCacheBackend"
> class="org.springframework.cache.ehcache.EhCacheFactoryBean">
> <property name="cacheManager">
> <ref local="aclCacheManager"/>
> </property>
> <property name="cacheName">
> <value>aclCache</value>
> </property>
> <property name="timeToIdle">
> <value>180</value>
> </property>
> <property name="timeToLive">
> <value>180</value>
> </property>
> <property name="maxElementsInMemory">
> <value>20000</value>
> </property>
> </bean>
>
> <bean id="aclCache"
> class="net.sf.acegisecurity.acl.basic.cache.EhCacheBasedAclEntryCache">
> <property name="cache"><ref
> local="aclCacheBackend"/></property>
> </bean>
>
> <bean id="basicAclProvider"
> class="net.sf.acegisecurity.acl.basic.BasicAclProvider">
> <property name="basicAclDao"><ref
> local="basicAclExtendedDao"/></property>
> <property name="basicAclEntryCache"><ref local="aclCache"/></property>
> </bean>
>
>
> I hope my tests could help code optimization.
>
> Thanks,
> Paulo
>
>
>
> On 5/18/05, Ben Alex <[EMAIL PROTECTED]> wrote:
> > Paulo Neves wrote:
> >
> > >My suggestion is, if we optimize time to remove domain objects we
> > >optimize a lot all process.
> > >
> > >
> > >
> > Hi Paulo
> >
> > To make it easier to discuss and reproduce scalability related issues
> > with the ACL packages, I've modified the Contacts sample to
> > automatically create 1,000 extra Contacts and associated ACL records at
> > startup. The DataSourcePopulator also has a "createEntities" parameter
> > which can be changed to a larger number. This is now checked into CVS.
> >
> > I had DataSourcePopulator create 10,000 entities, and then I did the
> > following:
> >
> > maven multiwar:multiwar
> > deploy acegi-security-sample-contacts-filter.war to Tomcat 5.5
> > visit the Contacts home page, then login as Marissa to view her contacts
> > maven -Dusername=marissa -Dpassword=koala -DnrOfCalls=3 run
> > maven -Dusername=dianne -Dpassword=emu -DnrOfCalls=3 run
> >
> > Then I repeated the above, but using your change to CollectionFilterer
> > (of course I had to jar:install from /core firstly). Only HttpInvoker
> > was used (this is now the default for Contacts). Initially it took
> > 12,000 ms for Dianne and 12,047 for Marissa. With your changes it took
> > 10,610 for Dianne and 10,687 for Marissa. A good improvement, but the
> > similarity of the original execution times between Dianne and Marissa
> > has me confused as to why your results reported a major difference in
> > execution time between them.
> >
> > Would you please see if you can reproduce my results and perhaps
> > re-check the original time difference between Dianne and Marissa.
> >
> > As an aside, I wouldn't generally be encouraging people to return 10,000
> > elements inside a Collection and then expect the ACL package to filter
> > out all but 4 or 5 items. That sort of thing is an abuse of an RDBMS
> > platform's inbuilt capabilities! :-) Still, we should aim to optimise
> > the Java code as greatly as possible, so I am happy to explore this
> > benchmarking and squeee better performance out of it.
> >
> > Cheers
> > Ben
> >
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>
>
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