Aishwarya,
On Sun, May 29, 2011 at 6:49 AM, Aishwarya Venkataraman
wrote:
> So how does reducer obtain the mapper's output ? Does it make a network call
> and read data from mappers local storage or does the mapper send the data ?
The mappers store the files at a location that is accessibly by t
So how does reducer obtain the mapper's output ? Does it make a network call
and read data from mappers local storage or does the mapper send the data ?
Thanks,
Aishwarya
On Sat, May 28, 2011 at 6:08 PM, jagaran das wrote:
> Mappers write to local persistance and reducers write to hdfs
>
> - Jag
Mappers write to local persistance and reducers write to hdfs
- Jagaran
From: Aishwarya Venkataraman
To: common-dev@hadoop.apache.org
Sent: Sat, 28 May, 2011 4:11:13 PM
Subject: Question regarding network data transfer
Hello,
Where exactly(Java class) does t
Hello,
Where exactly(Java class) does the network data transfer happen from a
mapper to a reducer ? Mapper seems to be writing data to the HDFS. Does
reducer read data from the mapper's HDFS over the network ? This is evading
me. Thanks in advance for the help.
Cheers,
Aishwarya
