[openstack-dev] Scheduler proposal

Davanum Srinivas davanum at gmail.com
Sun Oct 11 00:53:16 UTC 2015


Thomas,

i am curious as well. AFAIK, cassandra works well with OpenJDK. Can you
please elaborate what you concerns are for #1?

Thanks,
Dims

On Sat, Oct 10, 2015 at 5:43 PM, Joshua Harlow <harlowja at fastmail.com>
wrote:

> 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?
>
> -Josh
>
> 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)
>>
>>
>> __________________________________________________________________________
>> OpenStack Development Mailing List (not for usage questions)
>> Unsubscribe:
>> OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>
>
> __________________________________________________________________________
> OpenStack Development Mailing List (not for usage questions)
> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>



-- 
Davanum Srinivas :: https://twitter.com/dims
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20151010/79f370c2/attachment.html>


More information about the OpenStack-dev mailing list