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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (CASSANDRA-847) Make the reading half of compactions memory-efficient
Date Fri, 09 Apr 2010 05:29:50 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stu Hood resolved CASSANDRA-847.
--------------------------------

    Resolution: Incomplete

> Make the reading half of compactions memory-efficient
> -----------------------------------------------------
>
>                 Key: CASSANDRA-847
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-847
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Stu Hood
>            Priority: Critical
>             Fix For: 0.7
>
>         Attachments: 0001-Add-structures-that-were-important-to-the-SSTableSca.patch,
0002-Implement-most-of-the-new-SSTableScanner-interface.patch, 0003-Rename-RowIndexedReader-specific-test.patch,
0004-Improve-Scanner-tests-and-separate-SuperCF-handling-.patch, 0005-Add-Scanner-interface-and-a-Filtered-implementation-.patch,
0006-Add-support-for-compaction-of-super-CFs-and-some-tes.patch, 0007-Remove-ColumnKey-bloom-filter-maintenance.patch,
0008-Make-Scanner-extend-Iterator-again.patch, 0009-Make-CompactionIterator-a-ReducingIterator-subclass-.patch,
0010-Alternative-to-ReducingIterator-that-can-return-mult.patch, compaction-bench-847.txt,
compaction-bench-trunk.txt, compaction-bench.patch
>
>
> This issue is the next on the road to finally fixing CASSANDRA-16. To make compactions
memory efficient, we have to be able to perform the compaction process on the smallest possible
chunks that might intersect and contend one-another, meaning that we need a better abstraction
for reading from SSTables.

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