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Re: backup of hdfs data - MapReduce - [mail # user]
...You have other options.   You could create a secondary cluster. You could also look in to Cleversafe and what they are doing with Hadoop.   Here's the sad thing about backing up to...
   Author: Michael Segel, 2012-11-06, 04:44
Re: Map Reduce slot - MapReduce - [mail # user]
..."However in production clustes the jvm size is marked final to prevent  abuses that may lead to OOMs."  Not necessarily.    On Nov 1, 2012, at 6:43 AM, Bejoy Ks  wro...
   Author: Michael Segel, 2012-11-01, 12:44
Re: Insight on why distcp becomes slower when adding nodemanager - MapReduce - [mail # user]
...Not sure.  Lots of things can effect your throughput.  Networking is my first guess. Which is why I asked about the number of  times you've run the same test to see if there i...
2 emails [+ more]    Author: Michael Segel, 2012-10-31, 19:23
Re: How do map tasks get assigned efficiently? - MapReduce - [mail # user]
...So...   Data locality only works when you actually have data on the cluster  itself. Otherwise how can the data be local.   Assuming 3X replication, and you're not doing a cus...
   Author: Michael Segel, 2012-10-24, 11:51
Re: Old vs New API - MapReduce - [mail # user]
...They were official, back around 2009, hence the first API was  deprecated.   The reason that they removed the deprecation was that the 'new' API  didn't have all of the featur...
   Author: Michael Segel, 2012-10-24, 11:46
Re: Java heap space error - MapReduce - [mail # user]
...Try upping the child to 1.5GB or more.  On Oct 21, 2012, at 8:18 AM, Subash D'Souza  wrote:  last week the cluster was running until there was an error in the name  node ...
   Author: Michael Segel, 2012-10-21, 16:33
Re: Hadoop counter - MapReduce - [mail # user]
...On Oct 21, 2012, at 1:45 AM, Lin Ma  wrote:  resolved by you. The last two questions (or comments) are used to  confirm my understanding is correct, the counters from previous...
5 emails [+ more]    Author: Michael Segel, 2012-10-21, 12:15
Re: HDFS using SAN - MapReduce - [mail # user]
...I haven't played with a NetApp box, but the way it has been explained to  me is that your SAN appears as if its direct attached storage.  Its possible, based on drives and other ha...
   Author: Michael Segel, 2012-10-18, 13:58
Re: Hadoop and CUDA - MapReduce - [mail # user]
...When you create your jar using netbeans, do you include the Hadoop  libraries in the jar you create?  This would increase the size of the jar and in this case, size does  matt...
   Author: Michael Segel, 2012-10-18, 12:21
Re: Hive Query with UDF - MapReduce - [mail # user]
...You really don't want to do that. It becomes a nightmare in that you now ship a derivative of Hive and  then have to maintain it and keep it in lock step w Hive from Apache.   &nbs...
2 emails [+ more]    Author: Michael Segel, 2012-10-18, 02:21
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