Github user joshelser commented on the pull request:
https://github.com/apache/accumulo/pull/50#issuecomment-155168971
> For iterators that can be run at major compaction, how can we exercise
delete keys?
Very good question! The completely mocked-out IteratorEnvironment is a sign
that I haven't thought past the scan case. I'm not even sure if the
ColumnFiltering iterator with SortedMapIterator is even a 100% valid in-memory
reproduction of how it works in a TabletServer.
I had left input entirely up to the user, so I'm not sure of a simple way
to test deletions without potentially messing up some expected table structure.
There are some tricky edge cases at compaction that I haven't yet considered
how to encapsulate. Combiners on non-full compactions are another good example.
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