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[HDFS-4498] Investigate possible performance benefits by using protobuf option optimize_for = SPEED - HDFS - [issue]
...The default is to optimize for code size : https://groups.google.com/forum/?fromgroups=#!topic/protobuf/OtL7Bb4NiRIHas anyone ever investigated how much effort protobuf de/serialization take...
http://issues.apache.org/jira/browse/HDFS-4498    Author: Ravi Prakash, 2013-02-13, 18:57
[HDFS-3321] Error message for insufficient data nodes to come out of safemode is wrong. - HDFS - [issue]
...Courtesy Andreina,When "dfs.namenode.safemode.min.datanodes" is configured to nSo namenode will be in safemode until n DN are registered with the namenode .But in UI it displays that n+1 dat...
http://issues.apache.org/jira/browse/HDFS-3321    Author: Ravi Prakash, 2012-09-07, 22:02
[HDFS-3135] Build a war file for HttpFS instead of packaging the server (tomcat) along with the application. - HDFS - [issue]
...There are several reason why web applications should not be packaged along with the server that is expected to serve them. For one not all organisations use vanilla tomcat. There are other r...
http://issues.apache.org/jira/browse/HDFS-3135    Author: Ravi Prakash, 2012-08-31, 04:52
[HDFS-3558] OfflineImageViewer throws an NPE - HDFS - [issue]
...Courtesy Mithun RadhakrishnanException in thread "main" java.lang.NullPointerException at org.apache.hadoop.security.authentication.util.KerberosName.getShortName(KerberosName.java:371) at o...
http://issues.apache.org/jira/browse/HDFS-3558    Author: Ravi Prakash, 2012-07-10, 18:31
Documentations links for >=23.1 are broken on the Apache HDFS front page - HDFS - [mail # dev]
...Hi folks,  http://hadoop.apache.org/hdfs/  Documentation links for 23.1 and 2.0.0 are broken. Can we please just remove them / point them to the right pages? Would this be an INFRA...
   Author: Ravi Prakash, 2012-05-24, 12:02
Re: New bie questions re: namenode and masters - HDFS - [mail # user]
...Hi Chao,  What documentation are you reading? This is pretty accurate : http://hadoop.apache.org/common/docs/r0.20.203.0/hdfs_design.html  The NameNode is indeed responsible for th...
   Author: Ravi Prakash, 2012-05-24, 11:58
Re: query regarding balancer - HDFS - [mail # user]
...I would think its a bug if at any datanode more than 5 blocks are being moved at any time for balancing. How're you checking how many blocks are being moved?  On Fri, May 4, 2012 at 3:1...
   Author: Ravi Prakash, 2012-05-04, 16:15
[expand - 1 more] - Re: Rack decommission - HDFS - [mail # user]
...Hi Dave,  I'm not entirely certain, but briefly looking at code: http://search-hadoop.com/c/Hadoop:/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmana...
   Author: Ravi Prakash, 2012-05-04, 14:49
[expand - 1 more] - Re: Re:Hsqldb jar (which missed in latest release) - HDFS - [mail # user]
...Hi Brahma,  I've filed and patched https://issues.apache.org/jira/browse/MAPREDUCE-4197for this issue. The hsqldb-2.0.0.jar will then be available in the hadoop-mapreduce*.tar.gz file. ...
   Author: Ravi Prakash, 2012-04-25, 22:49
Re: When I connect to Hadoop it always 'retrying connect', something wrong with my configurations? - HDFS - [mail # user]
...Or maybe its  a flaky network connection? Perhaps you can do a ping and check the network link is reliable?  The only daemon that needs to be up is Namenode and unless you are taki...
   Author: Ravi Prakash, 2012-04-25, 12:13
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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