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[expand - 2 more] - Re: Getting job information, joining a job in hadoop 0.20.1 - Hadoop - [mail # user]
...Hmm, Oh well, a bit of effort pays off: On 0.20.2  org.apache.hadoop.mapreduce.JobID jid  org.apache.hadoop.mapreduce.JobID.forName(jd);  org.apache.hadoop.mapred.JobClient jc...
   Author: Saptarshi Guha, 2010-05-26, 19:42
Number of combiner threads in a JVM - Hadoop - [mail # user]
...Hello, If a combiner is set, the combiner might run in parallel with the map or the reducer. I say might because it is not guaranteed that the combiner will run.  Q: How many combiner t...
   Author: Saptarshi Guha, 2010-03-16, 21:41
[expand - 1 more] - Re: Class hook for Tasktracker JVM start/stop - Hadoop - [mail # user]
...please forget i asked this question ...  On Sun, Mar 14, 2010 at 2:50 AM, Saptarshi Guha  wrote:...
   Author: Saptarshi Guha, 2010-03-14, 08:02
[expand - 1 more] - Re: Cluster Summary, Heap Size - Hadoop - [mail # user]
...Oh, I presume this is the value of HADOOP_HEAPSIZE specified in the hadoop-env.sh and is the heap given to the deamon by Java. I guess this answers the question.  On Tue, Mar 2, 2010 at...
   Author: Saptarshi Guha, 2010-03-03, 17:45
[expand - 1 more] - Re: On CDH2, (Cloudera EC2) No valid local directories in property: mapred.local.dir - Hadoop - [mail # user]
...Hello, I fixed this by running more than >=2 slaves. I was testing with 1 when this error occurred.  Regards Saptarshi  On Tue, Feb 23, 2010 at 2:57 PM, Todd Lipcon  wrote:...
   Author: Saptarshi Guha, 2010-02-26, 06:02
Fixed Re: On CDH2, (Cloudera EC2) No valid local directories in property: mapred.local.dir - Hadoop - [mail # user]
...As a follow up, this is not peculiar to my programs but hadoop ones too: I started the cluster as (using Fedora AMI and c1.medium)  hadoop-ec2 launch-cluster --env REPO=testing --env HA...
   Author: Saptarshi Guha, 2010-02-19, 22:49
A unique number for every task (map/reduce) - Hadoop - [mail # user]
...Hello, The name of a map task attempt is  attempt_201002092101_0063_m_N_X (N=1,.... # of map tasks)  and that of a reduce is  attempt_201002092101_0063_r_M_X where X is maybe ...
   Author: Saptarshi Guha, 2010-02-12, 17:07
[expand - 3 more] - Re: Balancing a cluster when a new node is added - Hadoop - [mail # user]
...I think that port itself is blocked. I'll contact the sysadmins. Thanks  On Mon, Jan 11, 2010 at 7:46 PM, Saptarshi Guha  wrote: 10 min  there on...
   Author: Saptarshi Guha, 2010-01-12, 03:08
MapFileoutput Format: keys out of order when emitting in reduce (Hadoop 0.20) - Hadoop - [mail # user]
...Hello,  I re-wrote MapFileOutputFormat for use with Hadoop 0.20.1 and have a question. Suppose my Map sends key-value pairs to the reducers. In my reducer, for a given key value, i emit...
   Author: Saptarshi Guha, 2009-12-23, 20:46
Request for access to context in partitioner - Hadoop - [mail # user]
...Hello Is it possible for the partitioner's constructor to accept the hadoop0.20 context object?  My keys can be complex and would (if possible) like to partition in say the i'th element...
   Author: Saptarshi Guha, 2009-12-10, 21:54
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