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From William Slacum <>
Subject Re: Is the Column Family especially useful for iterators?
Date Fri, 11 Jul 2014 02:41:46 GMT
Like most things in big table, it really depends on your use case. The
column family can potentially control the location of a given key/value
pair on disk.

I wouldn't say it's necessarily more useful than any other part of the key
tuple. We have some built-ins that make searching for or suppressing column
families easier. They matter more when in a locality group, as there are
potential performance gains there.

On Thu, Jul 10, 2014 at 10:01 PM, David Medinets <>

> In a recent conversation, someone mentioned that the Column Family is
> especially useful in custom iterators. Unfortunately I was not able to
> follow up to get details. Can anyone share a use case showing how
> information in a Column Family is better inside an iterator than
> information in another part of the Accumulo key?

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