accumulo-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From David Medinets <>
Subject Re: Iterators returning keys out of scan range
Date Sat, 25 May 2013 13:36:35 GMT
Is there a unit test exposing this behavior? And what does "reversible
transformation" mean?

On Wed, May 1, 2013 at 8:36 PM, Adam Fuchs <> wrote:

> For all the rest of you on this thread, the big problem you'll run into
> when returning keys out of range is that the reseeking behavior will skip a
> bunch of underlying keys (i.e. don't try this at home). For example, say
> you have tablets ["A","D"], ("D","M"], and ("M","ZZZZ..."]. If you do a
> query on ["A","M"] and return "N" after seeing the underlying key "A", you
> may never see keys from the ("D","M"] tablet. A good rule of thumb is to
> return keys in the same row as the underlying keys that were used to
> generate them and use a reversible transformation of columns within each
> row.

View raw message