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From Colin Kincaid Williams <disc...@uw.edu>
Subject ext4 on a hadoop cluster datanodes
Date Mon, 06 Oct 2014 21:46:41 GMT
Hi,

I'm trying to figure out what are more ideal settings for using ext4 on
hadoop cluster datanodes. From the hadoop site its recommended nodelalloc
option is chosen in the fstab. Is that still a preferred option?

I read elsewhere to disable the ext4 journal, and use data=writeback.

http://fenidik.blogspot.com/2010/03/ext4-disable-journal.html

Finally, in some slides i read to use dir_index,sparse_super,extent when
creating the filesystem, and mount noatime and nodiratime

http://www.slideshare.net/leonsp/best-practices-for-deploying-hadoop-biginsights-in-the-cloud

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