Jeper created HADOOP-15724:
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Summary: Some rack awareness question
Key: HADOOP-15724
URL: https://issues.apache.org/jira/browse/HADOOP-15724
Project: Hadoop Common
Issue Type: Test
Environment: hadoop-2.5.2
Reporter: Jeper
Attachments: image-2018-09-06-17-12-02-610.png
When I use the rack awareness, I stop all the machines in a rack, and then
write the data and report the following error，I don't think this is a
reasonable design
!image-2018-09-06-17-12-02-610.png!
I think the following design is more reasonable:
can write, but only one replica, or can write, several copies on the same rack
I have some questions
1. What's the difference when writing data, between rack awareness and no rack
2. Join a rack awareness when a running cluster joins, will the old data be
distributed to both racks?
Forgive me, I am not very familiar with java programming, can't understand the
source code.
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