In the aforementioned EC2 wiki page, it has a configuration section
labeled "(Pre 0.17) Hadoop cluster variables (GROUP, MASTER_HOST,
NO_INSTANCES)". I had assumed that I would actually need hadoop-0.17
on my ec2 instances in order to forgo those instructions. It sounds
like you're telling me that all the "pre 0.17" or "0.17" specific
instructions in the wiki page refer only to the ec2 creation scripts,
not the actual running version in the cluster, is that correct?
correct.
the only reason these scripts are in the 0.17 branch is because they
are not backward compatible with themselves.
Also, how safe is it to run a different version of the ec2 scripts
from the actual running hadoop instance? I'm guessing it's pretty
safe since you suggested it :)
there are no dependencies between the EC2 scripts and Hadoop core. you
can use them with any version, as long as you build EC2 Images for the
versions of Hadoop you are after with the 'new' scripts.
Thanks again for all the help - still wrapping my mind around this
stuff.
keep the questions coming. will be glad to see HBase running on ec2,
maybe we can put your changes back into the tree.
Chris K Wensel
[EMAIL PROTECTED]
http://chris.wensel.net/
http://www.cascading.org/
