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MapReduce, mail # user - OK to run data node on same machine as secondary name node?


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OK to run data node on same machine as secondary name node?
David Rosenstrauch 2012-08-15, 22:11
I have a Hadoop cluster that's a little tight on resources.  I was
thinking one way I could solve this could be by running an additional
data node on the same machine as the secondary name node.

I wouldn't dare do that on the primary name node, since that machine
needs to be extremely performant.  But since all the secondary name node
does is doing a merge of the name node's checkpoint and logs, which is
not an activity that require top-notch real-time performance, I thought
it might not be a problem if I were to set up a data node running there
as well.

Any reasons why that might be a bad idea?

Thanks,

DR