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Re: Hadoop distcp from CDH4 to Amazon S3 - Improve Throughput - HDFS - [mail # user]
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...CDH4 can be either 1.x or2.x hadoop, are you using the 2.x line? I've used it primarily with 1.0.3, which is what AWS uses, so I presume that's what it's tested on. Himanish Kushary &n...
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Author: David Parks,
2013-03-29, 14:34
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RE: Hadoop distcp from CDH4 to Amazon S3 - Improve Throughput - HDFS - [mail # user]
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...None of that complexity, they distribute the jar publicly (not the source, but the jar). You can just add this to your libjars: s3n://region.elasticmapreduce/libs/s3distcp/latest/s3distcp.ja...
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Author: David Parks,
2013-03-29, 05:41
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RE: Hadoop distcp from CDH4 to Amazon S3 - Improve Throughput - HDFS - [mail # user]
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...Have you tried using s3distcp from amazon? I used it many times to transfer 1.5TB between S3 and Hadoop instances. The process took 45 min, well over the 10min timeout period you're running ...
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Author: David Parks,
2013-03-28, 07:56
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Which hadoop installation should I use on ubuntu server? - HDFS - [mail # user]
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...I'm moving off AWS MapReduce to our own cluster, I'm installing Hadoop on Ubuntu Server 12.10. I see a .deb installer and installed that, but it seems like files are all over t...
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Author: David Parks,
2013-03-28, 06:07
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For a new installation: use the BackupNode or the CheckPointNode? - HDFS - [mail # user]
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...For a new installation of the current stable build (1.1.2 ), is there any reason to use the CheckPointNode over the BackupNode? It seems that we need to choose one or the...
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Author: David Parks,
2013-03-23, 06:59
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RE: On a small cluster can we double up namenode/master with tasktrackers? - HDFS - [mail # user]
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...Good points all, The mapreduce jobs are, well. intensive. We've got a whole variety, but typically I see them use a lot of CPU, a lot of Disk, and upon occasion a whole bunch o...
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Author: David Parks,
2013-03-20, 09:27
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On a small cluster can we double up namenode/master with tasktrackers? - HDFS - [mail # user]
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...I want 20 servers, I got 7, so I want to make the most of the 7 I have. Each of the 7 servers have: 24GB of ram, 4TB, and 8 cores. Would it be terribly unwise of me to Run such...
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Author: David Parks,
2013-03-18, 10:24
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How "Alpha" is "alpha"? - HDFS - [mail # user]
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... "This release, like previous releases in hadoop-2.x series is still considered alpha primarily since some of APIs aren't fully-baked and we expect some churn in future." ...
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Author: David Parks,
2013-03-12, 07:56
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RE: How can I limit reducers to one-per-node? - HDFS - [mail # user]
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...I tried that approach at first, one domain to one reducer, but it failed me because my data set has many domains with just a few thousand images, trivial, but we also have reasonably many ma...
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Author: David Parks,
2013-02-11, 06:29
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RE: Question related to Decompressor interface - HDFS - [mail # user]
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...In the EncryptedWritableWrapper idea you would create an object that takes any Writable object as it's parameter. Your EncryptedWritableWrapper would naturally implement ...
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Author: David Parks,
2013-02-11, 03:24
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