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Suggestion for max.mapred.map.tasks - Hadoop - [mail # user]
...Hello, I have access to a small group of heterogenous servers: A has four cores, 16gb B : four such machines , eight Cores ,16gb C: two, each with 16 Cores  and 128gb  Each of thes...
   Author: Saptarshi Guha, 2009-12-10, 21:42
Re: GC overhead limit reached when tasktrackers start - Hadoop - [mail # user]
...Yes, this is it, because the TT's were running fine before the bad job. I cleared the directory(which took forever) and it worked Thanks Saptarshi  On Mon, Nov 30, 2009 at 12:48 PM, Tod...
   Author: Saptarshi Guha, 2009-11-30, 21:32
Creating Sequence File in C++ - Hadoop - [mail # user]
...Hello,  Let my Key-Value be something like BinaryWritables (my own class, but something like this).  Is there a way to create the Sequence File composed of several such key - value...
   Author: Saptarshi Guha, 2009-11-28, 03:07
Re: The name of the current input file during a map - Hadoop - [mail # user]
...Hello again, I'm using Hadoop 0.21 and its context object  e.g   public void setup(Context context) { Configuration cfg = context.getConfiguration(); System.out.println("mapred.in...
   Author: Saptarshi Guha, 2009-11-26, 07:27
Number of maps do not correspond to mapred.tasktracker.map.tasks.maximum - Hadoop - [mail # user]
...Hello, I'm using Hadoop 0.21 and have mapred.tasktracker.map.task.max set to   6. Yet despite there being 1000 tasks only is being run (according to the web ui)(the corresponding one fo...
   Author: Saptarshi Guha, 2009-09-07, 22:27
Re: Textoutputformat not outputting all keys in Hadoop 0.20? - Hadoop - [mail # user]
...Hello, The problem is rather odd. I installed the version you mentioned and still have the same problem. My HBBytesWritable has a toString method. Texouputformat calls this.  a) If my t...
   Author: Saptarshi Guha, 2009-09-07, 22:12
Outputformat with a header attached - Hadoop - [mail # user]
...Hello, Suppose I'd like to subclass TextOutputFormat(Hadoop 0.20) wherein the   first 12 bytes is an offset. The record writer does its thing and in the close method I write some inform...
   Author: Saptarshi Guha, 2009-09-07, 21:42
Map update % - Hadoop - [mail # user]
...Hello, How does the 'map % complete' (web ui) get updated in Hadoop 0.20? i.e when run (in the Mapper class) calls map, does it update the % or does it update the % when my map does a contex...
   Author: Saptarshi Guha, 2009-09-02, 15:51
Re: Jobtracker still finding old task nodes - Hadoop - [mail # user]
...My mistake, i had assumed the trackers were not running on those machines. But they were ...  On Sun, Aug 16, 2009 at 2:19 AM, Saptarshi Guha wrote:  ...
   Author: Saptarshi Guha, 2009-08-16, 16:10
Re: 404 Error on Web UI - Hadoop - [mail # user]
...Well it works now, but after numerous starts/restarts and reinstallation(oh, and removing the classpath in bashrc, it appears HBASE once had this issue)  Regards Saptarshi  On Sun,...
   Author: Saptarshi Guha, 2009-08-16, 15:57
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