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[expand - 2 more] - HDFS copyToLocal and get crc option - HDFS - [mail # user]
...I am using default values for both. My version is 1.1.2, and the default value for "dfs.block.size" (67108864) is evenly divisible by 512.  However, the default value online reference f...
   Author: Tom Brown , 2014-01-31, 17:58
[expand - 5 more] - Is there any way to partially process HDFS edits? - HDFS - [mail # user]
...They were created and deleted in quick succession. I thought that meant the edits for both the create and delete would be logically next to each other in the file allowing it to release the ...
   Author: Tom Brown , 2013-09-26, 21:42
Physically moving HDFS cluster to new - HDFS - [mail # user]
...We have a situation where we want to physically move our small (4 node) cluster from one data center to another. As part of this move, each node will receive both a new FQN and a new IP addr...
   Author: Tom Brown , 2013-04-17, 17:20
HADOOP_CLIENT_OPTS getting set multiple times (is this a bug?) - HDFS - [mail # user]
...I am using Hadoop 1.0.2 (the stock .deb, compiled by HortonWorks AFAIK).  I noticed that my task tracker processes have multiple "-Xmx" configs attached, and that the later ones (128m) ...
   Author: Tom Brown , 2013-03-12, 19:50
Splitting logs in hdfs by account - HDFS - [mail # user]
...It seems that moving the files around (if they're all output to a single directory by MultipleOutputs) should be a lightweight operation for hdfs.  My thinking is that a physical copy o...
   Author: Tom Brown , 2013-02-09, 21:31
HDFS replication and data loss - HDFS - [mail # user]
...I have a small cluster (3 machines, with 6 data disks/box) running HBase on top of Hadoop HDFS (1.0.2). Generally this works as expected, and quite well. But the equipment I have is old and ...
   Author: Tom Brown , 2012-11-30, 18:40
[expand - 1 more] - Differences between YARN and Hadoop - HDFS - [mail # user]
...Right now Hadoop seems to refer to the bundle of the MRv1 framework and HDFS though both can be used independently. Since MRv2 is its own top level project, where does leave HDFS?  --To...
   Author: Tom Brown , 2012-10-18, 22:28
To anyone (not) going to Hadoop world in a week - HDFS - [mail # user]
...All,  This is an odd request, and I apologize for posting it, but I couldn't think of any alternatives.  The Hadoop world conference in NYC is sold out, and I would really like to ...
   Author: Tom Brown , 2012-10-12, 16:37