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https://issues.apache.org/jira/browse/CASSANDRA-332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740137#action_12740137
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Jonathan Ellis commented on CASSANDRA-332:
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1. if you don't have both the beginning and end of a the block in the index it
doesn't work, since you have a question mark at one side or the other. getting
rid of count isn't about space savings, it's about simplifying the code --
there was a _lot_ of lines to updating and passing count around as you probably
noticed.
2. ok, will fix
> Clean up SSTableSliceIterator to not echo data around DataOutput/Inputs
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-332
> URL: https://issues.apache.org/jira/browse/CASSANDRA-332
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Fix For: 0.4
>
> Attachments:
> 0001-CASSANDRA-332-add-test-for-multi-block-reversal.txt,
> 0002-don-t-serialize-unused-column-count-into-column-index.txt,
> 0003-always-write-indexes-for-at-least-first-and-last-colum.txt,
> 0004-move-comparator-out-of-IndexInfo.txt,
> 0005-avoid-copying-variables-to-ColumnGroupReader-that-it-c.txt,
> 0006-final-cleanup-of-SSTableSliceIterator-now-with-less-u.txt
>
>
> use CFSerializer.deserializeEmpty and then read the columns as necessary,
> similar to what was done for SSTableNamesIterator
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