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Re: Which Subphases Do Times on JobHistory Web UI Cover - HDFS - [mail # user]
...Average map time includes everything the map task is doing, i.e. all the things you mentioned.  Reduce time does not cover shuffle time.  Reduce time is the time spent calling the ...
   Author: Sandy Ryza, 2013-09-25, 02:17
Re: Semantics of ApplicationResourceUsageReport - HDFS - [mail # user]
...Hi Albert,  You're correct about used.  Reserved is a little bit more arcane - it refers to a mechanism that schedulers use to prevent applications with larger container sizes from...
   Author: Sandy Ryza, 2013-09-21, 08:22
Re: API difference between hadoop branch1 and branch2? - HDFS - [mail # user]
...Hi Li Yu,  I don't think it has been published yet, but a document on the MapReduce changes was recently completed at https://issues.apache.org/jira/browse/MAPREDUCE-5184.  -Sandy ...
   Author: Sandy Ryza, 2013-07-18, 17:46
Re: Containers and CPU - HDFS - [mail # user]
...That's correct.  -Sandy   On Tue, Jul 2, 2013 at 12:28 PM, John Lilley wrote:  ...
   Author: Sandy Ryza, 2013-07-02, 20:04
Re: temporary folders for YARN tasks - HDFS - [mail # user]
...LocalDirAllocator should help with this.  You can look through MapReduce code to see how it's used.  -Sandy   On Mon, Jul 1, 2013 at 11:01 PM, Devaraj k  wrote:  ...
   Author: Sandy Ryza, 2013-07-02, 06:12
Re: Yarn job stuck with no application master being assigned - HDFS - [mail # user]
...Hi Siddhi,  Moving this question to the CDH list.  Does setting yarn.scheduler.capacity.maximum-am-resource-percent to .5 help?  Have you tried using the Fair Scheduler?  ...
   Author: Sandy Ryza, 2013-06-21, 23:28
Re: container allocation - HDFS - [mail # user]
...Hi John,  At this time, releasing containers is the preferred way to be strict about your locality requirements.  This is not included in a release yet, but https://issues.apache.o...
   Author: Sandy Ryza, 2013-06-14, 19:50
Re: built hadoop! please help with next steps? - HDFS - [mail # user]
...I've been successful with importing all the leaf-level maven projects as "Existing Maven Projects" using the eclipse maven plugin.  I've also gotten things to work without the eclipse m...
   Author: Sandy Ryza, 2013-05-31, 22:22
Re: Is there a way to limit # of hadoop tasks per user at runtime? - HDFS - [mail # user]
...Hi Mehmet,  Are you using MR1 or MR2?  The fair scheduler, present in both versions, but configured slightly differently, allows you to limit the number of map and reduce tasks in ...
   Author: Sandy Ryza, 2013-05-21, 21:57
Re: Automatically mapping a job submitted by a particular user to a specific hadoop map-reduce queue - HDFS - [mail # user]
...Sagar,  I'm glad to hear that it would help.  Unfortunately, we are no longer adding features to CDH3, so you would have to upgrade to CDH4 or backport it yourself to use it.  ...
   Author: Sandy Ryza, 2013-04-26, 18:38
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