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https://issues.apache.org/jira/browse/CASSANDRA-821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851620#action_12851620
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Jonathan Ellis commented on CASSANDRA-821:
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With CASSANDRA-917 in, what I'd like to see in 821 is a layer (part of
QueryFilter? a separate class?) that provides an Iterator<Row>, from a bunch
of sstables and memtables, the way QF provides ColumnIterators. (You would get
each Row from a key + ColumnFamily, and each CF from a group of
ColumnIterators.)
> get_range_slice performance
> ---------------------------
>
> Key: CASSANDRA-821
> URL: https://issues.apache.org/jira/browse/CASSANDRA-821
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 0.6
> Reporter: Brandon Williams
> Assignee: Johan Oskarsson
> Priority: Minor
> Fix For: 0.7
>
> Attachments: CASSANDRA-821.patch, CASSANDRA-821.patch,
> CASSANDRA-821.patch
>
>
> get_range_slice performance isn't that great. CASSANDRA-799 helped in the
> case when the memtable isn't flushed, but overall the operations per second
> and latency is still pretty bad. On a quad core node with a trivial amount
> of data I see around 130-150 ops per second with stress.py set to slice 100
> keys at a time, and latency is 300-500ms.
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