accumulo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Keith Turner <ke...@deenlo.com>
Subject Re: [jira] [Commented] (ACCUMULO-227) Improve in memory map counts to provide cell level uniqueness for repeated columns in mutation
Date Thu, 22 Dec 2011 22:32:47 GMT
On Thu, Dec 22, 2011 at 5:23 PM, Aaron Cordova <aaron@cordovas.org> wrote:
> And just to be clear, since there are several definitions of key flying around - in the
following case:
>
> row1,colfam1,colqual1,4 -> valueA
> row1,colfam1,colqual1,5 -> valueB
>
> These can coexist peacefully - although the versioning iterator might supress all but
k versions.
>
> in this case:
>
> row1,colfam1,colqual1,4 -> valueA
> row1,colfam1,colqual1,4 -> valueB
>
> Accumulo should throw one away arbitrarily. I think what you mentioned, a system iterator
that performs this logic, would be a good implementation.

I am opposed to making this a system iterator.  I like iterators
seeing the data in sorted form, not  "sort -u" :)

Mime
View raw message