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[expand - 1 more] - RE: Does hadoop installations need to be at same locations in cluster ? - Hadoop - [mail # user]
...Ok,  Here's the thing...  1) When building the cluster, you want to be consistent.  2) Location of $HADOOP_HOME is configurable. So you can place it anywhere.  Putting th...
   Author: Michael Segel, 2011-12-23, 17:55
Re: Hadoop configuration - Hadoop - [mail # user]
...Class project due? Sorry, second set of questions on setting up a 2 node cluster...  Sent from my iPhone  On Dec 22, 2011, at 3:25 AM, "Humayun kabir"  wrote:  ...
   Author: Michael Segel, 2011-12-23, 12:59
[expand - 4 more] - RE: More cores Vs More Nodes ? - Hadoop - [mail # user]
... Tom,  Look,  I've said this before and I'm going to say it again.  Your knowledge of Hadoop is purely academic. It may be ok to talk to C leve l execs who visit the San ...
   Author: Michael Segel, 2011-12-15, 20:57
RE: Regarding loading a big XML file to HDFS - Hadoop - [mail # user]
...Just wanted to address this: y in  cover complete file size.  also configure the block size to cover complete file size. In this  case, only one mapper and reducer will be spa...
   Author: Michael Segel, 2011-11-22, 03:58
RE: Matrix multiplication in Hadoop - Hadoop - [mail # user]
...Ok Mike,  First I admire that you are studying Hadoop.   To answer your question... not well.  Might I suggest that if you want to learn Hadoop, you try and find a prob lem wh...
   Author: Michael Segel, 2011-11-18, 18:48
RE: mapr "common" library? - Hadoop - [mail # user]
...Not sure what you mean....  But w MapR, you have everything under the /opt/mapr/hadoop/hadoop* tree. There you'll see the core library and also the other ./contrib, etc direc tories. &n...
   Author: Michael Segel, 2011-10-20, 04:02
[expand - 1 more] - RE: Can we replace namenode machine with some other machine ? - Hadoop - [mail # user]
...Well you could do RAID 1 which is just mirroring. I don't think you need to do any raid 0 or raid 5 (striping) to get better  performance. Also if you're using a 1U box, you just need 2...
   Author: Michael Segel, 2011-09-22, 16:23
[expand - 4 more] - RE: risks of using Hadoop - Hadoop - [mail # user]
...Kobina  The points 1 and 2 are definitely real risks. SPOF is not.  As I pointed out in my mini-rant to Tom was that your end users / developer s who use the cluster can do more ha...
   Author: Michael Segel, 2011-09-21, 17:48
[expand - 1 more] - RE: Using HBase for real time transaction - Hadoop - [mail # user]
...   I think there has to be some clarification.   The OP was asking about a mySQL replacement.  HBase will never be a RDBMS replacement.  No Transactions means no way...
   Author: Michael Segel, 2011-09-21, 01:48
RE: Hadoop multi tier backup - Hadoop - [mail # user]
...Matthew, the short answer is hire a consultant to work with you on your D R/BCP strategy. :-)  Short of that... you have a couple of things...  Your back-up cluster, is it in the s...
   Author: Michael Segel, 2011-08-30, 20:13
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