On Aug 9, 2011, at 9:28 PM, Hyunsik Choi wrote: > Hi guys, > > MRv2 looks very promising for various applications. We have considered > an application based on Yarn, but this app is required the adaptive > resource assignment. In other words, this app may need additional > resources while this app is running. Is it possible? >
Absolutely. > After I look at some code, especially YARNRunner, ResourceMgrDelegate, > and ClientRMProtocol. In these classes, an application seems to be > submitted with necessary resource capacity description. So, it is > impossible? Typically, MR applications present resource requirements for maps upfront (after split calculation), but submit reduce resource requirements later. So, yes - applications can change their resource requests at any point during their lifecycle. hth, Arun
