Hi,
- Hadoop 1.0.2 uses a SecretKey, but I don't understand what's the purpose
of that. Can anyone explain what's the purpose of the SecretKey?
- Is this Secret key shared between JobTracker, TaskTrackers, and Map and
Reduce tasks?
--
Best regards,
granted
From: shanmukhan battinapati [mailto:shanmukha...@gmail.com]
Sent: 20 September 2012 15:14
To: user@hadoop.apache.org
Subject: unsubscribe
Thanks Regards
Shanmukhan.B
On Wed, Sep 19, 2012 at 8:18 AM, 黄 山 thuhuang...@gmail.com wrote:
unsubscribe
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发自我的 iPhone
Hi, all
I have a question that whether all the intermediate output with the same
key go to the same reducer or not?
If it is, in case of only two keys are generated from mapper, but there are
3 reducer running in this job, what would happen?
If not, how could I do some processing over the all
Hi,
Yes. By contract, all intermediate output with the same key goes to
the same reducer.
In your example, suppose of the two keys generated from the mapper,
one key goes to reducer 1 and the second goes to reducer 2, reducer 3
will not have any records to process and end without producing any
Hi, all
I have encounter a weird problem, I got a MR job which would always failed
if there are large number of input file(e.g. 400 input files), but
always succeed if there is only a little input files(e.g. 20 input files).
In this job , the map phase would read all the input files and
Hi all,
I have noticed that sometimes the hdfs takes too long to act upon a
specific change in the configuration e.g. the replication factor. While
the under/over replicated state of a file is immediately detected, the
corrective action may take some time, even if the file sizes are very
Hi Jason
Are you seeing any errors in your data node logs. Specifically like '
xceivers count exceeded'. In that case you may need to bump up te value of
dfs.datanode.max.xcievers to ahigher value.
If not, it is possible that you are crossing the upper limit of open files
on your linux boxes
Exactly Ted, and just trying to be respectful of this being an Apache
mailing list.
Snarky behavior devalues everyone's efforts, so trying to head that off as
it doesn't have any place on a community list or forum.
From: Ted Dunning tdunn...@maprtech.com
To: user@hadoop.apache.org,
Just clarifying because of the reference to mainframe
IBM BigInsights runs on clusters of x86 servers.
John
From: Michael Segel michael_se...@hotmail.com
To: user@hadoop.apache.org
Cc: serge.blazhiyevs...@nice.com
Date: 09/20/2012 05:25 AM
Subject:Re: IBM big
On Thu, Sep 20, 2012 at 5:24 AM, Michael Segel
michael_se...@hotmail.com wrote:
Why is it that when anyone asks a question about IBM Tom wants to take it off
line?
To be fair, most vendors tend to redirect distro-specific discussion
to non-apache.org forums. Cloudera has a cdh-user list, MapR
Hi
If not, how could I do some processing over the all data, like counting?
Maybe you can refer to the teraSort example in hadoop. it use a partitioner
that splits text keys into roughly equal partitions in a global sorted
order.
On Thu, Sep 20, 2012 at 9:28 PM, Hemanth Yamijala
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