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http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivo Ladage - van Doorn updated AMDATUCASSANDRA-117:
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Labels: blueconic (was: )
> Support for forking the Cassandra application into a separate VM
> ----------------------------------------------------------------
>
> Key: AMDATUCASSANDRA-117
> URL: http://jira.amdatu.org/jira/browse/AMDATUCASSANDRA-117
> Project: Amdatu Cassandra
> Issue Type: New Feature
> Components: Cassandra daemon
> Reporter: Bram de Kruijff
> Labels: blueconic
>
> Cassandra by design does not behave well in an OSGi environment. As discussed
> in the mailing list (see [0]) we should look into spawning it in a seperate
> VM.
> {quote}
> Pros:
> 1) Amdatu Cassandra can not handle the service lifecycle or
> configuration updates properly (and thus is not provisionable).
> Forking a private VM and controlling that from the service lifecycle
> solves this.
> 2) Amdatu Cassandra needs an agent which appears not desirable in an
> AMA. Forking a private VM and controlling that from the service
> lifecycle solves this.
> 3) Amdatu Cassandra has specific memory and gc requirements for
> optimal performance. Forking a private VM means decouple memory and GC
> that you can optimize.
> 4) Amdatu Cassandra currenlty system exits the entire AMA in case of
> for example a configuration problem. Forking a private VM and
> controlling that from the service lifecycle solves this.
> Cons:
> 1) Forking a private VM means 2 Xms/Xmx heaps possibly causing higher
> ram requirements for small systems.
> 2) Forking a private VM means you need to monitor it and account for
> ghosts after an ama crash.
> 3) Forking a VM means you need a known VM on the AMA node or
> provisision it yourself.
> {quote}
> [0] http://www.mail-archive.com/[email protected]/msg05288.html
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