Github user keith-turner commented on the issue:
https://github.com/apache/accumulo/pull/168
One option to consider instead of modifying RFile is to make it a decorator
like [BloomFilterLayer][1]. BloomFilterLayer stores its information in RFile
metadata. I'm think will be problems with this approach, but I would not know
what they are w/o actually trying it.
Are you considering making this a generic histogram functionality, where
the user can configure a function that emits counts for a given Key Value?
[1]:
https://github.com/apache/accumulo/blob/e900e67425d950bd4c0c5288a6270d7b362ac458/core/src/main/java/org/apache/accumulo/core/file/BloomFilterLayer.java
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