-Re: How is the memory usage of containers controlled?
Arun C Murthy 2013-06-21, 20:50
Start with LinuxResourceCalculatorPlugin.
On Jun 21, 2013, at 1:30 PM, Yuzhang Han <[EMAIL PROTECTED]> wrote:
> Thank you Arun.
> I am trying to study how YARN works. Can someone tell me which class(es) monitors containers w.r.t. memory usage?
> On 6/18/2013 4:07 PM, Arun C Murthy wrote:
>> NodeManagers monitor containers w.r.t memory usage, and put containers in cgroups with cpu limits to restrict CPU usage.
>> On Jun 18, 2013, at 12:30 PM, Yuzhang Han <[EMAIL PROTECTED]> wrote:
>>> I am curious about how YARN containers control their memory usage. Say, I have a MR job, and I configure that every map task should be assigned a 1 GB container, and every reduce task a 1.5 GB one. So, when YARN runs the containers, how is it ensured that all map containers use less than 1 GB memory and all reduce containers less than 1.5 GB? Is container memory control realized via -Xmx arguments in the scripts generated by YARN to invoke the MR program in the containers?
>>> Thank you.
>> Arun C. Murthy
>> Hortonworks Inc.
Arun C. Murthy