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Posted to general@hadoop.apache.org by Mag Gam <ma...@gmail.com> on 2010/03/13 17:45:16 UTC

configuration question

I have 4 hosts, hostA, hostB, hostC, hostD.


I plan on hosting my data directory as follows:

hostA:
/data

hostB:
/somedata

hostC:
/data

hostD:
/blahBalh


Is it possible to give a "macro" for each host in the core-site.xml to say:

if (host=hostA):
  use /data as dfs.data.dir

if (host=hostB):
  use /somedata

if (host=hostC):
  use /data

if (host=hostD):
  use /blahBalh


I want to do this because I plan to share the same core-site-xml file

Re: configuration question

Posted by Eric Sammer <er...@lifeless.net>.

On 3/13/10 11:45 AM, Mag Gam wrote:
> Is it possible to give a "macro" for each host in the core-site.xml to say:
> 
> if (host=hostA):
>   use /data as dfs.data.dir
> 
> if (host=hostB):
>   use /somedata
> 
> if (host=hostC):
>   use /data
> 
> if (host=hostD):
>   use /blahBalh
> 
> 
> I want to do this because I plan to share the same core-site-xml file

Usually what people do is use something like Puppet or cfengine and
build and deploy configurations from a template.

Check out:
http://reductivelabs.com/trac/puppet/wiki/BigPicture

-- 
Eric Sammer
eric@lifeless.net
http://esammer.blogspot.com