[openstack-dev] Scheduler proposal

Davanum Srinivas davanum at gmail.com
Sun Oct 11 00:54:10 UTC 2015


Not implying cassandra is the right option. Just curious about the
assertion.

-- Dims

On Sat, Oct 10, 2015 at 5:53 PM, Davanum Srinivas <davanum at gmail.com> wrote:

> 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)
>>>
>>>
>>>
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>
>
>
> --
> Davanum Srinivas :: https://twitter.com/dims
>



-- 
Davanum Srinivas :: https://twitter.com/dims
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