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Re: Which hardware to choose - Hadoop - [mail # user]
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...Had to ask :D On 10/02/2012 07:19 PM, Russell Jurney wrote:...
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Author: hadoopman,
2012-10-03, 01:33
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Re: Which hardware to choose - Hadoop - [mail # user]
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...Only 24 map and 8 reduce tasks for 38 data nodes? are you sure that's right? Sounds VERY low for a cluster that size. We have only 10 c2100's and are running I believ...
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Author: hadoopman,
2012-10-03, 01:14
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Re: Java Heap space error - Hadoop - [mail # user]
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...I'm curious if you have been able to track down the cause of the error? We've seen similar problems with loading data and I've discovered if I presort my data before the load th...
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Author: hadoopman,
2012-03-09, 06:51
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Hadoop and Ubuntu / Java - Hadoop - [mail # user]
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...http://www.omgubuntu.co.uk/2011/12/java-to-be-removed-from-ubuntu-uninstalled-from-user-machines/ I'm curious what this will mean for Hadoop on Ubuntu systems moving forward. &nb...
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Author: hadoopman,
2011-12-20, 15:42
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Re: Senthil wants to chat - Hadoop - [mail # user]
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...SPAM 2.0 :D On 08/27/2011 10:06 AM, Shahnawaz Saifi wrote:...
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Author: hadoopman,
2011-08-27, 22:07
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Hive dynamic partition error? - Hadoop - [mail # user]
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...So we're seeing the following error during some of our hive loads: 2011-07-05 12:26:52,927 Stage-2 map = 100%, reduce = 100% Ended Job = job_201106302113_3864 Loading data to tab...
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Author: hadoopman,
2011-07-11, 17:54
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Re: OutOfMemoryError: GC overhead limit exceeded - Hadoop - [mail # user]
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...I've run into similar problems in my hive jobs and will look at the 'mapred.child.ulimit' option. One thing that we've found is when loading data with insert overwrite into...
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Author: hadoopman,
2011-06-22, 23:40
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Re: Poor IO performance on a 10 node cluster. - Hadoop - [mail # user]
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...Some things which helped us include setting your vm.swappiness to 0 and mounting your disks with noatime,nodiratime options. Also make sure your disks aren't setup with RAID (JBO...
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Author: hadoopman,
2011-06-02, 00:56
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hadoop/hive data loading - Hadoop - [mail # user]
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...When we load data into hive sometimes we've run into situations where the load fails and the logs show a heap out of memory error. If I load just a few days (or months) of ...
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Author: hadoopman,
2011-05-10, 17:56
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Re: Hadoop demand - Hadoop - [mail # user]
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...My guess is it's like back in the days when Linux was considered a 'bad' option for running a production system and people would freak out when they found out about it. It ...
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Author: hadoopman,
2011-04-29, 13:18
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