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From Billie Rinaldi <billie.rina...@gmail.com>
Subject Re: Accumulo database type: columnar?
Date Tue, 24 Mar 2015 19:39:53 GMT
Yes.  Accumulo's default behavior is sparse row-oriented.  If a different
locality group were set up for every column, then it would be
column-oriented.  For other locality group configurations it might be
considered a hybrid of row-oriented and column-oriented.

On Tue, Mar 24, 2015 at 12:23 PM, Hider, Sandy <Sandy.Hider@jhuapl.edu>
wrote:

> According to Wikipedia:  http://en.wikipedia.org/wiki/Apache_Accumulo
> Accumulo is a column-oriented database.   Wikipedia defines column-oriented
> this way " A column-oriented database serializes all of the values of a
> column together, then the values of the next column, and so on."
>
> I understand it is possible to store some column related data together
> with locality groups but wouldn't the default behavior be key/value store
> type database instead of column-oriented?
>
> Thanks,
>
> Sandy
>
>
>
>
>

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