I think it is Mesos allocator to offer resources and it is up to framework scheduler to accept resources in the offer or decline.
2015-07-07 8:18 GMT+08:00 Vinod Kone <[email protected]>: > Mesos doesn't currently support the notion of requesting resources. > Resources are offered by Mesos based on a fair sharing algorithm (DRF) and > it is up to the allocator to accept (partial) resources or decline. > > On Mon, Jul 6, 2015 at 5:00 PM, Ying Ji <[email protected]> wrote: > >> Thanks for quick response. That is very helpful. >> >> So, if I understand correctly, the framework should keep the entire >> offer, even only partial of the offer is satisfied the requirement ? For >> example, the framework asks for totally 4GB memory as role of prod. And the >> master gives the offer: such as 2GB in host1, and 2GB in host2. For some >> reasons (probably data locality. etc), the framework thinks that 2GB in >> host1 is acceptable. But the framework has to keep the entire offer, and >> send another resource request to ask another 2GB memory. When the framework >> gets all the resource and launch the tasks, the un-used resource will be >> released ? So, although the framework asks for totally 4GB memory, it >> actually holds for 6GB until it launches the tasks ? >> >> Is this true ? >> >> Thanks >> >> Ying >> >> On Mon, Jul 6, 2015 at 4:25 PM, Connor Doyle <[email protected]> >> wrote: >> >>> Hi Ying, >>> >>> When launching tasks, the scheduler includes the resources to consume. >>> The remainder is implicitly declined. >>> Also, the scheduler can accept and merge multiple offers from the same >>> slave. >>> >>> -- >>> Connor >>> >>> >>> > On Jul 6, 2015, at 16:19, Ying Ji <[email protected]> wrote: >>> > >>> > Hey, mesos experts: >>> > >>> > I have a question about mesos resource allocation. If the >>> framework sends the resource request, the master will give the current best >>> offer to the framework (probably not the one which can satisfy the >>> framework completely). In this case, the framework can either accept the >>> offer or decline the offer. My question is: can the framework accept the >>> partial offer, and decline the other part ? >>> > >>> > >>> > Thanks >>> > >>> > Ying >>> >>> >> >
