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[expand - 1 more] - RE: Is FileSystem thread-safe? - MapReduce - [mail # user]
...Vinod, Thanks, I was mostly asking in the context of attempting to unify the output of multiple tasks.  I've seen that in most cases, users opt to output a folder full of file parts int...
   Author: John Lilley, 2013-05-17, 17:16
[expand - 2 more] - RE: Distribution of native executables and data for YARN-based execution - MapReduce - [mail # user]
...Vinod, Your first two items are spot on.  We don't expect to have the cluster to ourselves.  We also expect to interop with existing HDFS data and want to schedule for data localit...
   Author: John Lilley, 2013-05-17, 17:15
[expand - 1 more] - RE: Question about writing HDFS files - MapReduce - [mail # user]
...Right, sorry for the ambiguity, I was talking about HDFS writes only.  So my application doesn't need to do anything to signal that it is writing from inside vs. outside of the Hadoop c...
   Author: John Lilley, 2013-05-17, 13:38
YARN in 0.23 vs 2.0 - MapReduce - [mail # user]
...We will be programming to the YARN resource manager and scheduler in an upcoming project, but I am unclear regarding its level of integration in each version.   Searching for, say, Appl...
   Author: John Lilley, 2013-05-16, 18:46
RE: Why big block size for HDFS. - MapReduce - [mail # user]
...From: Rahul Bhattacharjee [mailto:[EMAIL PROTECTED]] Subject: Why big block size for HDFS.    While there are no guarantees that disk storage will be contiguous, the OS will attemp...
   Author: John Lilley, 2013-03-31, 18:58
RE: Query mongodb - MapReduce - [mail # user]
...Um, I think you and I are talking about the same thing, but maybe not?  Certainly HBase/MongoDB are HDFS-aware, so I would expect that if I am a client program running outside of the Ha...
   Author: John Lilley, 2013-01-16, 14:56
[expand - 1 more] - RE: Scheduling non-MR processes - MapReduce - [mail # user]
...Harsh,  Thanks for the insight!  I didn't realize that YARN was more than a more-scalable MR scheduler.  So if we program our application to schedule its tasks directly with Y...
   Author: John Lilley, 2013-01-12, 16:44
[expand - 2 more] - Re: Binary Search in map reduce - MapReduce - [mail # user]
...Oh that is very clever, you just need to make pseudo keys so that the graph record orders before the corresponding change records.   Mahesh Balija  wrote:    Hi Jamal, &n...
   Author: John Lilley, 2013-01-08, 04:05
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