Thomas Koch wrote:
Hi Jordà ,
The main issue that prevents the inclusion of the current Cloudera
package into Debian is that it depends on Sun's Java. I think it would
be interesting, at least for an official Debian package, to depend on
OpenJDK in order to make it possible to distribute it in "main" instead
of "contrib".
The build-depends line can easily be changed as long as hadoop will build with
openjdk. The binary will depend on java5-runtime-headless which is provided by
any java runtime. So the user of the package is free to choose either Sun or
openjdk.
Java6+ only. It will build on openjdk or jrockit, the Hadoop team
merely chooses to ignore all bug reports that you can't recreate on the
official JDKs. You are still free to fix them yourself. You must also
know that your JVM hasn't been tested at scale, unless you have the
scale to compare with the big datacentres.
What use cases are you thinking of here?
1) developer coding against the hadoop Java and C APIs
2) Someone setting up a small 1-5 machine cluster
3) large production datacentre of hundreds of worker nodes
4) transient virtualised worker nodes
for (3) and (4) the challenge is getting the right configuration out
there, where configuration =
hadoop XML files
log4j settings
rack awareness scripts
and such like
For virtualised clusters you set up one node then ask the infrastructure
for 100 instances; for physical ones you just need to get the right
files out everywhere. Packaging them up and pushing it out as a .deb or
RPM is one option -the cloudera one- and is better than trying to by
hand -but it is only one option.
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