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https://issues.apache.org/jira/browse/AMBARI-8815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14275187#comment-14275187
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Hari Sekhon commented on AMBARI-8815:
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I think the current problem with the new HDP package structure is that you
can't swap a command prefixed with {code}/usr/hdp/2.2.0.0-2014/something{code}
to {code}/usr/hdp/current/something{code} since the links under the current
directly don't map cleanly to the /usr/hdp/<version> directory structure they
point to, breaking the portability.
> Add Parcel support similar to Cloudera Manager
> ----------------------------------------------
>
> Key: AMBARI-8815
> URL: https://issues.apache.org/jira/browse/AMBARI-8815
> Project: Ambari
> Issue Type: Improvement
> Components: stacks
> Affects Versions: 1.7.0
> Environment: HDP 2.2
> Reporter: Hari Sekhon
>
> Instead of installing lots of RPMs consider adding Parcel support as is done
> in Cloudera Manager.
> I wasn't sure about it when we first started using it in Cloudera but it's
> actually much simpler and cleaner.
> A Parcel is basically just a tarball that you unpack to
> /opt/<stack>/<version> and then link /opt/<stack>/current to the currently
> active version so you can easily keep lots of them adjacently.
> It also simplifies deploying a stack since there is no variation of what is
> installed and what is missing, it's always the same directory tree and
> linking is very simple (much simpler than the latest HDP 2.2 attempt where
> /usr/hdp/current doesn't actually map straight to the version dir meaning you
> can't just use /usr/hdp/current/... as the prefix for all commands like you
> should be able to - as I used to do on Cloudera).
> Having a static prefix that is relinked like /opt/<stack>/current would make
> commands portable across different versions of the stack, a major win
> compared to the current HDP 2.2 implementation where you need to explicitly
> specify a prefix containing the exact version eg. /usr/hdp/2.2.0.0-2041/ -
> which is not portable at all (this might actually just be because the
> symlinks under current/ are named differently to what they link to though).
> Regards,
> Hari Sekhon
> (ex-Cloudera)
> http://www.linkedin.com/in/harisekhon
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