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https://issues.apache.org/jira/browse/ACCUMULO-227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174478#comment-13174478
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John Vines commented on ACCUMULO-227:
-------------------------------------
A timestamp does provide uniqueness, but I have found that when users start
intentionally mucking with timestamps problems arise. It's best to let Accumulo
handle timestamps. Which does lead to potential problems with duplicate columns
for those who are just aggregating.
While clients can aggregate on their end, the is no convenient mechanism to run
a table's configured aggregator against a mutation.
> Improve in memory map counts to provide cell level uniqueness for repeated
> columns in mutation
> -----------------------------------------------------------------------------------------------
>
> Key: ACCUMULO-227
> URL: https://issues.apache.org/jira/browse/ACCUMULO-227
> Project: Accumulo
> Issue Type: Improvement
> Components: tserver
> Reporter: John Vines
> Assignee: John Vines
> Fix For: 1.5.0
>
>
> Currently for isolation we only isolate mutations. This doesn't allow
> mutations with identical cells within it. We should increase the mutation
> counts to account for each individual cell instead of each mutation.
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