It's named posix because it should work on any Posix compatible system, e.g., Linux, OSX, *BSD, etc.
On Sat, Jul 12, 2014 at 2:14 AM, yifan <[email protected]> wrote: > BTW why it's called posix isolation? It confused me too at the first time. > > Yifan > > > On 07/11/2014 11:24 AM, Asim wrote: > > >> Is there any reason preventing you from using the cgroups cpu and >>memory isolators? > yes -- the reason was ignorance. I was not aware cgroups are not enabled by > default. I will enable cgroups now. Thanks for your response! > > Regards, > Asim > > > On Fri, Jul 11, 2014 at 2:12 PM, Ian Downes <[email protected]> wrote: >> >> The posix/cpu isolator doesn't actually do any isolation - it only is >> useful to report cpu utilization. If you want to constrain the amount >> of cpu available to each container you must use the cgroups/cpu >> isolator. >> >> Ian >> >> On Fri, Jul 11, 2014 at 10:55 AM, Asim <[email protected]> wrote: >> > Hi, >> > >> > I am using the default (posix) isolation. Also, I do not see the systemd >> > running (not sure how that affects isolation). >> > >> > >> > Thanks, >> > Asim >> > >> > >> > >> > On Fri, Jul 11, 2014 at 12:46 PM, Tim St Clair <[email protected]> >> > wrote: >> >> >> >> It will also matter if you are using systemd. >> >> >> >> Cheers, >> >> Tim >> >> >> >> ----- Original Message ----- >> >> > From: "Dick Davies" <[email protected]> >> >> > To: [email protected] >> >> > Sent: Friday, July 11, 2014 11:43:36 AM >> >> > Subject: Re: mesos isolation >> >> > >> >> > Are you using cgroups, or the default (posix) isolation? >> >> > >> >> > >> >> > >> >> > On 11 July 2014 17:06, Asim <[email protected]> wrote: >> >> > > Hi, >> >> > > >> >> > > I am running a job on few machines in my Linux cluster. Each >> >> > > machine >> >> > > is an >> >> > > Intel 8 core (with 32 threads). I see a total of 32 CPUs in >> >> > > /etc/cpuinfo >> >> > > and >> >> > > within mesos web interface. When I launch a job using mesos, I see >> >> > > that all >> >> > > CPUs are used equally and not just the number of CPUs I specify for >> >> > > that >> >> > > task. >> >> > > >> >> > > Furthermore, I also see that the average per task running time >> >> > > within >> >> > > a >> >> > > single machine, with 5 tasks/machine is 1/2 as much as that with 10 >> >> > > tasks/machine. Within mesos, each task has 1 CPU assigned and it is >> >> > > completely CPU bound (no dataset, no file access). As per mesos, >> >> > > the 5 >> >> > > tasks >> >> > > job uses 5 CPUs while the 10 task job uses 10 CPUs (so average task >> >> > > run >> >> > > times should be same unlike what I am seeing). Also, when I monitor >> >> > > CPU >> >> > > utilization, I see that all CPUs are used equally. I am really >> >> > > confused. >> >> > > Is >> >> > > this how mesos/container isolation is supposed to work? >> >> > > >> >> > > Thanks, >> >> > > Asim >> >> > > >> >> > >> >> >> >> -- >> >> Cheers, >> >> Timothy St. Clair >> >> Red Hat Inc. >> > >> > > > > > > -- > Gu Yifan
