[openstack-dev] Scheduler proposal

Joshua Harlow harlowja at fastmail.com
Sun Oct 11 00:43:40 UTC 2015

I'm curious is there any more detail about #1 below anywhere online?

Does cassandra use some features of the JVM that the openJDK version 
doesn't support? Something else?


Thomas Goirand wrote:
> On 10/07/2015 07:36 PM, Ed Leafe wrote:
>> Several months ago I proposed an experiment [0] to see if switching
>> the data model for the Nova scheduler to use Cassandra as the backend
>> would be a significant improvement as opposed to the current design
> This is probably right. I don't know, I'm not an expert in Nova, or its
> scheduler. However, to make it possible for us (ie: downstream
> distributions and/or OpenStack users) to use Cassandra, you have to
> solve one of the below issues:
> 1/ Cassandra developers upstream should start caring about OpenJDK, and
> make sure that it is also a good platform for it. They should stop
> caring only about the Oracle JVM.
> ... or ...
> 2/ Oracle should make its JVM free software.
> As there is no hope for any of the above, Cassandra is a no-go for
> downstream distributions.
> So, by all means, propose a new back-end, implement it, profit. But that
> back-end cannot be Cassandra the way it is now.
> Cheers,
> Thomas Goirand (zigo)
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