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[HDFS-6075] Introducing "non-replication mode" - HDFS - [issue]
...Afaik, HDFS does not provide an easy way to temporarily disable the replication of missing blocks.If you would like to temporarily disable the replication, you would have to set dfs.namenode...
http://issues.apache.org/jira/browse/HDFS-6075    Author: Adam Kawa, 2014-03-12, 20:23
[HDFS-5588] Incorrect values of trash configuration and trash emptier state in namenode log - HDFS - [issue]
...Values of trash configuration and trash emptier state in namenode log are displayed in milliseconds (but it should be seconds). This is very confusing because it makes you feel that Trash do...
http://issues.apache.org/jira/browse/HDFS-5588    Author: Adam Kawa, 2014-01-24, 08:50
Re: Hadoop setup doubts - HDFS - [mail # user]
...Hi,  http://hortonworks.com/blog/simplifying-user-logs-management-and-access-in-yarn/  http://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html &n...
   Author: Adam Kawa, 2013-12-15, 16:53
Re: empty file - HDFS - [mail # user]
...i have never seen something like that.  Can you read that file?  $ hadoop fs -text  /tmp/corrupt_lzo/lc_hadoop16.1386270004881.lzo   2013/12/11 chenchun  ...
   Author: Adam Kawa, 2013-12-11, 19:37
[expand - 1 more] - Re: how to handle the corrupt block in HDFS? - HDFS - [mail # user]
...When you identify a file with corrupt block(s), then you can locate the machines that stores its block by typing $ sudo -u hdfs hdfs fsck  -files -blocks -locations   2013/12/11 Ad...
   Author: Adam Kawa, 2013-12-11, 02:01
Re: Job stuck in running state on Hadoop 2.2.0 - HDFS - [mail # user]
...It sounds like the job was successfully submitted to the cluster, but there as some problem when starting/running AM, so that no progress is made. It happened to me once, when I was playing ...
   Author: Adam Kawa, 2013-12-10, 23:29
[expand - 1 more] - Re: issue about running example job use custom mapreduce var - HDFS - [mail # user]
...Accidentally, I clicked "Sent" by a mistake. Plase try:  hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar terasort *-Dmapreduce.job.reduces=34* /alex/terasort/1G-input...
   Author: Adam Kawa, 2013-12-10, 23:16
Re: Hadoop 2.2.0 from source configuration - HDFS - [mail # user]
...Daniel,  I see that in previous hdfs report, you had: hosta.subdom1.tld1, but now you have feynman.cids.ca. What is the content of your /etc/hosts file, and output of $hostname command?...
   Author: Adam Kawa, 2013-12-03, 18:55
Re: mapreduce.jobtracker.expire.trackers.interval no effect - HDFS - [mail # user]
...I did a small test, and I a setting mapred.tasktracker.expiry.interval=60000 worked for me (TT became considered as lost after around 66 seconds).  Can the formula be: mapred.tasktracke...
   Author: Adam Kawa, 2013-12-03, 18:23
Re: How to do aggregate operations with multiple reducers - HDFS - [mail # user]
...In general, I think that this is an acceptable solution.  However, if you have a very large number of reducer (let's say, large hundreds or thousands), then reading the content of thous...
   Author: Adam Kawa, 2013-11-30, 16:37
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