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RE: steps to fix data block corruption after server failure - Hadoop - [mail # user]
...Tadas,  One time I remember disconnecting a bunch of DNodes from my dev cluster i/o of required, more elegant "exclude". The next thing I learned was my FS was corrupted.  I did no...
   Author: Kartashov, Andy, 2012-12-20, 17:28
RE: unsubscrib - Hadoop - [mail # user]
...I thought it was supposed to be addressed to unsubscribe-user.....@..... hehehe   From: Prabhat Pandey [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2012 12:14 PM To: [EMAIL ...
   Author: Kartashov, Andy, 2012-12-19, 17:18
build-truck-branch/ version control / POM / check out /git / maven / ant - Hadoop - [mail # user]
...Why does one need to build an app from source if one can download gzip file and gunzip and use the app. Why git, why check out... What's considered "building"? I have been exposed to bits an...
   Author: Kartashov, Andy, 2012-12-18, 15:56
RE: Datanode: "Cannot start secure cluster without privileged resources" - Hadoop - [mail # user]
...Try running  $sudo jps or jps as root "#jps"  You will get more info, i.e:  ****Jps ***** SecondaryNameNode ***** JobTracker ***** NameNode   From: [EMAIL PROTECTED] [mai...
   Author: Kartashov, Andy, 2012-11-26, 14:52
RE: MapReduce APIs - Hadoop - [mail # user]
...Harsh,  Thanks for the " DistributedCache.addCacheFile(URI, job.getConfiguration());" suggestion. What class is your instance job belongs to? It is not Job class, for sure. So must be J...
   Author: Kartashov, Andy, 2012-11-26, 14:48
RE: Argumments to Hadoop Command - Hadoop - [mail # user]
...With the Error: " Output directory hdfs://.com/user/krishna/input already exists" simply delete the output directory perior to runnign the job.  $hadoop fs -rm  "output/file"  ...
   Author: Kartashov, Andy, 2012-11-26, 14:29
RE: guessing number of reducers. - Hadoop - [mail # user]
...Bejoy,  I've read somethere about keeping number of mapred.reduce.tasks below the reduce task capcity. Here is what I just tested:  Output 25Gb. 8DN cluster with 16 Map and Reduce ...
   Author: Kartashov, Andy, 2012-11-21, 17:49
io.file.buffer.size - Hadoop - [mail # user]
...Guys,  I've read that increasing above (default 4kb) number to, say 128kb, might speed things up.  My input is 40mln serialised records coming from RDMS and I noticed that with inc...
   Author: Kartashov, Andy, 2012-11-21, 16:18
RE: Issue when clicking on BrowseFileSystem - Hadoop - [mail # user]
...Andy,  Thanks. Glad I asked.  I run Hadoop in pseudo-distrib on amazon instance in the cloud. Shall I cha nge "localhost" in both core-site and mapred-site to my?  p.s. I can ...
   Author: Kartashov, Andy, 2012-10-15, 20:00
RE: puzzled at the output - Hadoop - [mail # user]
...I want:  Key             Value1           Value2           I get double tags: Key       &n...
   Author: Kartashov, Andy, 2012-10-02, 16:01
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