If you don't care at all about accounting usage of that resource then you should be able to set it to 0.0. As Ian mentioned, this won't be enforced with the cpu isolator disabled. -- Connor
> On Mar 11, 2015, at 08:43, Ian Downes <idow...@twitter.com> wrote: > > The --isolation flag for the slave determines how resources are *isolated*, > i.e., by not specifying any cpu isolator there will be no isolation between > executors for cpu usage; the Linux scheduler will try to balance their > execution. > > Cpu and memory are considered required resources for executors and I believe > the master enforces this. > > What are behavior are you trying to achieve? If your jobs don't require much > cpu then can you not just set a small value, like 0.25 cpu? > >> On Wed, Mar 11, 2015 at 7:20 AM, Geoffroy Jabouley >> <geoffroy.jabou...@gmail.com> wrote: >> Hello >> >> As cpu relatives shares are *not very* relevant in our heterogenous cluster, >> we would like to get rid of CPU resources management and only use MEM >> resources for our cluster and tasks allocation. >> >> Even when modifying the isolation flag of our slave to >> "--isolation=cgroups/mem", we see these in the logs: >> >> from the slave, at startup: >> I0311 15:09:55.006750 50906 slave.cpp:289] Slave resources: >> ports(*):[31000-32000, 80-443]; cpus(*):2; mem(*):1979; disk(*):22974 >> >> from the master: >> I0311 15:15:16.764714 50884 hierarchical_allocator_process.hpp:563] >> Recovered ports(*):[31000-32000, 80-443]; cpus(*):2; mem(*):1979; >> disk(*):22974 (total allocatable: ports(*):[31000-32000, 80-443]; cpus(*):2; >> mem(*):1979; disk(*):22974) on slave >> 20150311-150951-3982541578-5050-50860-S0 from framework >> 20150311-150951-3982541578-5050-50860-0000 >> >> And mesos master UI is showing both CPU and MEM resources status. >> >> >> >> Btw, we are using Marathon and Jenkins frameworks to start our mesos tasks, >> and the "cpus" field seems mandatory (set to 1.0 by default). So i guess you >> cannot easily bypass cpu resources allocation... >> >> >> Any idea? >> Regards >> >> 2015-02-19 15:15 GMT+01:00 Ryan Thomas <r.n.tho...@gmail.com>: >>> Hey Don, >>> >>> Have you tried only setting the 'cgroups/mem' isolation flag on the slave >>> and not the cpu one? >>> >>> http://mesosphere.com/docs/reference/mesos-slave/ >>> >>> >>> ryan >>> >>>> On 19 February 2015 at 14:13, Donald Laidlaw <donlaid...@me.com> wrote: >>>> I am using Mesos 0.21.1 with Marathon 0.8.0 and running everything in >>>> docker containers. >>>> >>>> Is there a way to have mesos ignore the cpu relative shares? That is, not >>>> limit the docker container CPU at all when it runs. I would still want to >>>> have the Memory resource limitation, but would rather just let the linux >>>> system under the containers schedule all the CPU. >>>> >>>> This would allow us to just allocate tasks to mesos slaves based on >>>> available memory only, and to let those tasks get whatever CPU they could >>>> when they needed it. This is desireable where there can be lots of >>>> relative high memory tasks that have very low CPU requirements. Especially >>>> if we do not know the capabilities of the slave machines with regards to >>>> CPU. Some of them may have fast CPU's, some slow, so it is hard to pick a >>>> relative number for that slave. >>>> >>>> Thanks, >>>> >>>> Don Laidlaw >
