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From Keith Turner <ke...@deenlo.com>
Subject Re: Assignment Overview Doc
Date Thu, 13 Aug 2015 13:37:08 GMT
i noticed the document uses <server>:<port>  to identify tablet servers in
some places.   Something more specific is used in the code
: <server>:<port>:<zk session id>.   This last dimension allows the master
to distinguish between two different instances of a tserver running at the
same host and port at different times.

On Wed, Aug 12, 2015 at 12:39 PM, Josh Elser <josh.elser@gmail.com> wrote:

> I had some HBase friends ask me for a design document on how Tablet
> assignment in Accumulo works. Their assignment logic continues to be a pain
> point and there's been a lot of confusion about wanting to use FATE for
> assignments (even moreso when I would tell people: no, that's unnecessary).
>
> Since we didn't have a good reference document (I'm guessing because it
> was designed prior to the initial import of code), I took the time to write
> one up based on my understanding of the code and some pointers from Eric.
>
> Think this deserves a place in our documentation somewhere? Seems like
> it's a good reference sheet to have lying around, but I'm not sure where
> best it'd be stored.
>
> Huge thanks to Eric for his pointers and editing.
>
> http://people.apache.org/~elserj/AccumuloTabletAssignment.pdf
>
> - Josh
>

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