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[expand - 1 more] - Re: Where is the eclipse plug-in for hadoop 0.20.1 - Hadoop - [mail # user]
...Hi Stephen,  Thank you. It works   Jeff Zhang    On Mon, Nov 9, 2009 at 10:31 PM, Stephen Watt  wrote:  ...
   Author: Jeff Zhang, 2009-11-10, 09:53
Re: Problem with Hadoop - Hadoop - [mail # user]
...You can change the heapsize for child jvm by setting mapred.child.java.opts to -Xmx512m  The default heapsize is 200m which may be not enough for you, since Hama is matrix computing fra...
   Author: Jeff Zhang, 2009-11-10, 05:01
Re: Re: how to read file in hadoop - Hadoop - [mail # user]
...Maybe you can download the file to local to see what content is there.   Jeff Zhang   2009/11/10 Gang Luo   nd ms ite y) �) 11:47:02 上午 int  I n 邮箱贺卡全新上线� �� 邮箱贺卡全新上线� ��...
   Author: Jeff Zhang, 2009-11-10, 04:58
Re: Get File object from HDFS with Java - Hadoop - [mail # dev]
...No sure why you need file object. in hdfs, Path is something like File Object in local filesystem.  Jeff Zhang    On Wed, Nov 4, 2009 at 3:28 AM, iGama  wrote:  ...
   Author: Jeff Zhang, 2009-11-05, 00:06
Re: Problem regarding HDFS - Hadoop - [mail # user]
...Of course you can.  if you use hadoop 0.18.3, you only need to put hadoop-site.xml on your classpath, and put your custom configuration to this file   Jeff Zhang   On Wed, Nov...
   Author: Jeff Zhang, 2009-11-05, 00:04
Re: Best Practice: Hadoop vs Google App Engine - Hadoop - [mail # user]
...You can have more control on hadoop, you can create your own cluster with hadoop. Although hdfs's latency is high, HBase is a good choice for real time application.   Jeff Zhang   ...
   Author: Jeff Zhang, 2009-11-04, 12:39
EC2 do not support hadoop 0.18.3 - Hadoop - [mail # user]
...Hi all,  I found the the default value of HADOOP_VERSION is 0.17.0 in hadoop-ec2-env.sh of hadoop 0.18.3, and I can create hadoop 0.17.0 cluster in ec2 succesully, but I can not create ...
   Author: Jeff Zhang, 2009-10-30, 13:06
Can I install two different version of hadoop in the same cluster ? - Hadoop - [mail # user]
...Hi all,  I have installed hadoop 0.18.3 on my own cluster with 5 machines, now I want to install hadoop 0.20, but I do not run to uninstall the hadoop 0.18.3.  So what things shoul...
   Author: Jeff Zhang, 2009-10-30, 05:44
Re: What if an XML file cross boundary of HDFS chunks? - Hadoop - [mail # dev]
...Hi Steve,  When you want to read xml, you should provide your custom InputFormat which extends FileInputFormat.  and override the method isSplitable to not split a file , that mean...
   Author: Jeff Zhang, 2009-10-30, 00:42
[expand - 2 more] - Re: Need Help: The problem with text key of MapFile - Hadoop - [mail # general]
...I guess maybe HBase will be fit for you.   HBase is a distributed database built upon Hadoop. You can use the url as the row key and put other fields into columns.  then you can re...
   Author: Jeff Zhang, 2009-10-29, 02:16
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB