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RE: Speed up node under replicated block during decomission - Hadoop - [mail # user]
...Just a thought...  Really quick and dirty thing to do is to turn off the node.  Within 10 minutes the node looks down to the JT and NN so it gets marked as  down. Run an fsck ...
   Author: Michael Segel, 2011-08-12, 17:51
RE: Derby with Hadoop --Why? - Hadoop - [mail # general]
...Derby?  First a little history... Derby started out long ago as Cloudscape. Cloudscape was bought by Informix . Informix was bought by IBM. IBM didn't understand Cloudscape and decided ...
   Author: Michael Segel, 2011-08-09, 12:22
RE: Hadoop cluster network requirement - Hadoop - [mail # user]
...Yeah what he said. Its never a good idea. Forget about losing a NN or a Rack, but just losing connectivity between  data centers. (It happens more than you think.) Your entire cluster i...
   Author: Michael Segel, 2011-08-01, 23:57
RE: Moving Files to Distributed Cache in MapReduce - Hadoop - [mail # user]
...Yeah,  I'll write something up and post it on my web site. Definitely not InfoQ st uff, but a simple tip and tricks stuff.  -Mike    the FAQ page.  Any volunteers? (...
   Author: Michael Segel, 2011-08-01, 12:24
Reminder: 20-Jul-11 (Wed.) Chicago Hadoop User Group Meeting. - Hadoop - [mail # general]
...Just a quick reminder... CHUG (Chicago area Hadoop Usergroup) Meetup is hap pening at the CME.  This month is an "Ask The Experts" meeting.  For more information please visit http:...
   Author: Michael Segel, 2011-07-19, 15:57
RE: Hadoop upgrade Java version - Hadoop - [mail # user]
...Yeah... you can do that...  I haven't tried to mix/match different releases within a cluster, althoug h I suspect I could without any problems, but I don't want to risk it.  Until ...
   Author: Michael Segel, 2011-07-19, 11:51
RE: Which release to use? - Hadoop - [mail # user]
...  R. rt is  which  and , free Srivas,  I'm sorry, I thought I was being clear in that I was only addressing EMC  and not MapR directly. I was responding to post abou...
   Author: Michael Segel, 2011-07-19, 01:51
Re: Deduplication Effort in Hadoop - Hadoop - [mail # user]
...You don't have dupes because the key has to be unique.     Sent from my Palm Pre on AT&T On Jul 14, 2011 11:00 AM, [EMAIL PROTECTED] <jonathan.hwang@a ccenture.com> ...
   Author: Michael Segel, 2011-07-14, 16:18
RE: Performance Tunning - Hadoop - [mail # user]
... Matthew,  I understood that Juan was talking about a 2 socket quad core box.  We run  boxes with the e5500 (xeon quad core ) chips. Linux sees these as 16 cores.   ...
   Author: Michael Segel, 2011-06-28, 18:30
RE: Any reason Hadoop logs cant be directed to a separate filesystem? - Hadoop - [mail # user]
...Yes, and its called using cron and writing a simple ksh script to clear o ut any files that are older than 15 days.  There may be another way, but that's really the easiest.   stem...
   Author: Michael Segel, 2011-06-25, 10:58
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