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Support multiple block placement policies - Hadoop - [mail # user]
...Hi there,According to the code, the current implement of HDFS only supports onespecific type of block placement policy, which isBlockPlacementPolicyDefault by default.The default policy is e...
   Author: Zesheng Wu, 2014-09-15, 12:44
[expand - 2 more] - Re: HDFS: Couldn't obtain the locations of the last block - Hadoop - [mail # user]
...Hi Yi,I went through HDFS-4516, and it really solves our problem, thanks verymuch!2014-09-10 16:39 GMT+08:00 Zesheng Wu :Best Wishes!Yours, Zesheng ...
   Author: Zesheng Wu, 2014-09-10, 12:26
[expand - 7 more] - Re: Replace a block with a new one - Hadoop - [mail # user]
...Mmm, it seems that the facebook branchhttps://github.com/facebook/hadoop-20/hasimplemented reed-solomon codes, what I was checking earlier were thefollowing two issues:https://issues.apache....
   Author: Zesheng Wu, 2014-07-22, 01:54
Re: HDFS File Writes & Reads - Hadoop - [mail # user]
...1. HDFS doesn't allow parallel write2. HDFS use pipeline to write multiple replicas, so it doesn't take threetimes more time than a traditional file write3. HDFS allow parallel read2014-06-1...
   Author: Zesheng Wu, 2014-06-17, 14:08
Re: Programmatic Kerberos login with password to a secure cluster - Hadoop - [mail # user]
...Perhaps you can use LDAP(or any other possible way) to do theauthentication on the WebServer, and then let the WebServer as anauthenticated proxy user to  agent real users requests.2014...
   Author: Zesheng Wu, 2014-06-17, 01:58
Re: issue about how to decommission a datanode from hadoop cluster - Hadoop - [mail # user]
...I think you just need to set an exclude file on NN, that's enough.2014-05-30 14:09 GMT+08:00 ch huang :Best Wishes!Yours, Zesheng ...
   Author: Zesheng Wu, 2014-05-30, 11:48
Re: HDFS undo Overwriting - Hadoop - [mail # user]
...I am afraid this cannot undo, in HDFS only the data which is deleted by thedfs client and goes into the trash can be undone.2014-05-30 18:18 GMT+08:00 Amjad ALSHABANI :Best Wishes!Yours, Zes...
   Author: Zesheng Wu, 2014-05-30, 11:45
Re: Upgrade to 2.4 - Hadoop - [mail # user]
...Hi Ian,-rollingUpgrade is available since hadoop 2.4, so you can't use-rollingUpgrade to upgrade a 2.3 cluster to 2.4.Because HDFS 2.4 introduce protobuf formated fsimage, we must stop thewh...
   Author: Zesheng Wu, 2014-05-30, 11:43
[HADOOP-9823] Make ReconfigurableServlet compatible with chrome/firefox - Hadoop - [issue]
...The current implementation doesn't set the content type, the http server will return the default one 'text/plain', this will result in chrome/firefox displaying the servlet page as a plain t...
http://issues.apache.org/jira/browse/HADOOP-9823    Author: Zesheng Wu, 2013-08-04, 11:08
[HADOOP-9223] support specify config items through system property - Hadoop - [issue]
...The current hadoop config items are mainly interpolated from the *-site.xml files. In our production environment, we need a mechanism that can specify config items through system properties,...
http://issues.apache.org/jira/browse/HADOOP-9223    Author: Zesheng Wu, 2013-04-03, 04:47
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