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From Sujee Maniyam <su...@sujee.net>
Subject hadoop & DNS : a short tutorial and a tool to check DNS in a cluster
Date Thu, 08 Mar 2012 21:09:50 GMT
HI all,

I have a handy utility that will verify DNS settings in a cluster.
https://github.com/sujee/hadoop-dns-checker

- It is written in pure Java; doesn't use any third party libraries. So it
is very easy to compile and run.
- it does both  IP lookup and reverse DNS lookup
- will also check if machine's own hostname resolves correctly
- it can run on a single machine
- it can run on machines across cluster (using password-less ssh)

would love to get some feedback from others...

Also have a small tutorial on this subject here :
http://sujee.net/tech/articles/hadoop/hadoop-dns/

regards
Sujee
http://sujee.net

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