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[expand - 2 more] - Re: Merge Reducers Output - Hadoop - [mail # user]
...Sorry, but the OP was saying he had map/reduce job where the job had  multiple reducers where he wanted to then combine the output to a single  file.  While you could merge th...
   Author: Michael Segel, 2012-07-31, 20:44
[expand - 2 more] - Re: Counting records - Hadoop - [mail # user]
...If the task fails the counter for that task is not used.   So if you have speculative execution turned on and the JT kills a task,  it won't affect your end results.    A...
   Author: Michael Segel, 2012-07-23, 23:06
Re: Concurrency control - Hadoop - [mail # user]
...It goes beyond the atomic writes...  There isn't the concept of transactions in HBase.   He could also be talking about Hive, which would be appropriate for this  mailing list...
   Author: Michael Segel, 2012-07-18, 19:40
Re: Hive/Hdfs Connector - Hadoop - [mail # user]
...Have you tried using Hive's thrift server?   On Jul 5, 2012, at 10:20 AM, Sandeep Reddy P wrote:  ...
   Author: Michael Segel, 2012-07-05, 15:26
Re: Multiple cores vs multiple nodes - Hadoop - [mail # user]
...Hi, First, you have to explain what you mean by 'equivalent' .   The short answer is that it depends. The longer answer is that you have to consider cost in your design.   The whol...
   Author: Michael Segel, 2012-07-02, 12:08
Re: Hive error when loading csv data. - Hadoop - [mail # user]
...Alternatively you could write a simple script to convert the csv to a  pipe delimited file so that "abc,def" will be abc,def.  On Jun 26, 2012, at 2:51 PM, Harsh J wrote:  som...
   Author: Michael Segel, 2012-06-26, 20:00
[expand - 1 more] - Re: Can I remove a folder on HDFS when decommissioning a data node? - Hadoop - [mail # user]
...Well, there you go... care to open a Jira for it?  It would be very helpful... The OP's question presents a very good use  case.   Thx  -Mike  On Jun 26, 2012, at 10...
   Author: Michael Segel, 2012-06-26, 15:35
Re: oozie workflow file for teragen and terasort - Hadoop - [mail # user]
...There's a series of articles on Oozie by Boris Lublinsky over on InfoQ.  http://www.infoq.com/articles/introductionOozie  On Jun 23, 2012, at 7:42 PM, Hadoop James wrote:  ...
   Author: Michael Segel, 2012-06-24, 14:49
Re: Split brain - is it possible in hadoop? - Hadoop - [mail # user]
...In your example, you only have one active Name Node. So how would you  encounter a 'split brain' scenario?  Maybe it would be better if you defined what you mean by a split brain? ...
   Author: Michael Segel, 2012-06-19, 12:47
Re: Hardware specs calculation for io - Hadoop - [mail # user]
...You will want something in between...  8 cores means 8 spindles.   16 cores means 16 spindles.   You may want to up the memory, especially if you're running or thinking  ...
   Author: Michael Segel, 2012-06-13, 18:52
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