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Next CHUG (Chicago Hadoop User Group) meeting is Feb 16th @ Jefferson Tap - Hadoop - [mail # general]
...At our last meeting we had a great turnout for Chris Cooper's talk on Avro!  The next CHUG meeting will be a departure from our normal routine. Instead  of having a speaker, we're ...
   Author: Michael Segel, 2011-02-04, 16:59
RE: decommission a rack - Hadoop - [mail # general]
... Its ok if its in the dead column.  Take it out of your slaves file and when you reboot, it will not show up  at all.  Until then its just a foot note in history. :-) &nb...
   Author: Michael Segel, 2011-01-06, 20:53
RE: Image as input to M-R in Hadoop - Hadoop - [mail # general]
...Hi, The short answer is yes you can process images in Hadoop. Think of the image as a multi-line byte stream.  As to an existing class, I don't believe that it exists, but shouldn't &nb...
   Author: Michael Segel, 2010-11-29, 21:08
RE: program running faster on single node than cluster - Hadoop - [mail # user]
...Well...  There could be a couple of reasons for this... If you have a small data set, like it fits in to a single block, if you  have 12 nodes each w 10 mappers, that's 120 potenti...
   Author: Michael Segel, 2010-11-18, 16:26
RE: Generic Performance Tuning of MapReduce - Hadoop - [mail # user]
...Yeah... I would want to add one thing...  Its important to understand what each of the parameters are doing and how t o apply it to your cluster. You may have less cores/cpus, less/more...
   Author: Michael Segel, 2010-11-16, 22:45
RE: Deficiency in Hadoop - Hadoop - [mail # user]
...     a   One small nit. Remember that HBase is part of the hadoop infrastructure and here, locali ty of the data is less important, depending on your use case. ;-) And he...
   Author: Michael Segel, 2010-11-11, 13:09
RE: safemode: org.apache.hadoop.security.AccessControlException: Access denied for user root. Superuser privilege is required - Hadoop - [mail # user]
...Try running this as user hadoop or hdfs. (Depending on which version you ar e running.)  You need to do this on the name node.  If you're root ... # sudo -u hdfs /bin/ksh   An...
   Author: Michael Segel, 2010-11-06, 20:42
RE: namenode and jobtracker remote access problem - Hadoop - [mail # user]
...Well... means that its listening on all networks and in your case... eth0 a nd  I'd try adding your client to the /etc/hosts on the machines.    me r ...
   Author: Michael Segel, 2010-11-05, 12:13
RE: Loading conf file sitting in HDFS - Hadoop - [mail # general]
...Well the reason I kind of felt that it was added as an after thought is tha t you kind of have a chicken/egg situation.  I mean if you want to read a config file from HDFS, your applica...
   Author: Michael Segel, 2010-10-30, 01:39
RE: Running jar files inside map task - Hadoop - [mail # general]
...Uhm... just to take this in a different direction ...  Yes, you can run a jar file within your hadoop m/r job.  You may end up with class loader problems though, depending on what'...
   Author: Michael Segel, 2010-10-27, 14:20
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