Oversubscription and quotas

[Bharath Ravi Kumar <re...@gmail.com>]

Hi,

I'd like to understand if oversubscription will consider unused resources
reserved for certain quotas (i.e. the new roles-quotas feature being worked
on). If so, that would enable reserving minimum number of resources are
always available for certain roles while ensuring that the cluster can be
fully utilized when no tasks from those roles are running. In a way, it
achieves the effect of pre-emptive task scheduling (though they're not the
same of course). Can someone confirm if these two features are expected to
interact this way?

Thanks,
Bharath

Re: Oversubscription and quotas

[Bharath Ravi Kumar <re...@gmail.com>]

That's exactly what I was looking for. Thanks Guangya.

On Wed, Oct 21, 2015 at 9:16 AM, Guangya Liu <gy...@gmail.com> wrote:

> Hi Bharath,
>
> I think that you are requesting the "Optimistic Offer" feature which is
> under going. Please refer to the following link for detail:
>
> https://issues.apache.org/jira/browse/MESOS-1607
>
> https://docs.google.com/document/d/1RGrkDNnfyjpOQVxk_kUFJCalNMqnFlzaMRww7j7HSKU/edit
>
> The "Optimistic Offer"is kind of "Allocation Slack Oversubscription" which
> is very similar with "Usage Slack Oversubscription".
>
>
>
> Thanks,
>
> Guangya
>
> On Wed, Oct 21, 2015 at 11:35 AM, Bharath Ravi Kumar <re...@gmail.com>
> wrote:
>
>> Hi,
>>
>> I'd like to understand if oversubscription will consider unused resources
>> reserved for certain quotas (i.e. the new roles-quotas feature being worked
>> on). If so, that would enable reserving minimum number of resources are
>> always available for certain roles while ensuring that the cluster can be
>> fully utilized when no tasks from those roles are running. In a way, it
>> achieves the effect of pre-emptive task scheduling (though they're not the
>> same of course). Can someone confirm if these two features are expected to
>> interact this way?
>>
>> Thanks,
>> Bharath
>>
>
>

Re: Oversubscription and quotas

[Guangya Liu <gy...@gmail.com>]

Hi Bharath,

I think that you are requesting the "Optimistic Offer" feature which is
under going. Please refer to the following link for detail:

https://issues.apache.org/jira/browse/MESOS-1607
https://docs.google.com/document/d/1RGrkDNnfyjpOQVxk_kUFJCalNMqnFlzaMRww7j7HSKU/edit

The "Optimistic Offer"is kind of "Allocation Slack Oversubscription" which
is very similar with "Usage Slack Oversubscription".



Thanks,

Guangya

On Wed, Oct 21, 2015 at 11:35 AM, Bharath Ravi Kumar <re...@gmail.com>
wrote:

> Hi,
>
> I'd like to understand if oversubscription will consider unused resources
> reserved for certain quotas (i.e. the new roles-quotas feature being worked
> on). If so, that would enable reserving minimum number of resources are
> always available for certain roles while ensuring that the cluster can be
> fully utilized when no tasks from those roles are running. In a way, it
> achieves the effect of pre-emptive task scheduling (though they're not the
> same of course). Can someone confirm if these two features are expected to
> interact this way?
>
> Thanks,
> Bharath
>