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https://issues.apache.org/jira/browse/ACCUMULO-149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175576#comment-13175576
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Keith Turner commented on ACCUMULO-149:
---------------------------------------

I would propose putting MemKeyConversionIterator below the source switching 
iterator and changing its behavior. Remove the consume behavior and make it 
have a seek that handles MemKeys.  The SourceSwitching iterator will reseek 
using a MemKey.  To put it below the SourceSwitchingIterator make 
MemoryDataSource return it.
                
> Remove MyMapFile dependency in Isolation Image
> ----------------------------------------------
>
>                 Key: ACCUMULO-149
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-149
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>            Reporter: John Vines
>            Assignee: John Vines
>              Labels: cleanup
>             Fix For: 1.5.0
>
>
> MyMapFile and MySequenceFile are my mortal enemies and I wish for nothing 
> more than to purge them from our codebase. The biggest standing issue keeping 
> us from removing them entirely and using the compatible MapFile and 
> SequenceFile is the isolation image we use to ensure Scanner consistency. It 
> writes a temp MyMapFile to scan against until all scanners for that timeframe 
> are complete. Because of the extra information stored in the file, an RFile 
> is not quite compatible. So we need to come up with a method to use RFile to 
> get done what we need to get done.

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