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Posted to commits@cassandra.apache.org by "ZhaoYang (Jira)" <ji...@apache.org> on 2020/05/15 05:50:00 UTC
[jira] [Updated] (CASSANDRA-15815) SASI BounceIntersectionIterator
should perform skipTo() using biggest token value
[ https://issues.apache.org/jira/browse/CASSANDRA-15815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ZhaoYang updated CASSANDRA-15815:
---------------------------------
Fix Version/s: 4.x
> SASI BounceIntersectionIterator should perform skipTo() using biggest token value
> ---------------------------------------------------------------------------------
>
> Key: CASSANDRA-15815
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15815
> Project: Cassandra
> Issue Type: Bug
> Components: Feature/SASI
> Reporter: ZhaoYang
> Priority: Normal
> Fix For: 4.x
>
>
> In {{BounceIntersectionIterator}}, it polls the {{range iterator}} which has the smallest current token from priority queue and uses the smallest token to perform skipTo() on other range iterators where their current tokens are equal to or greater than the smallest token... In this case, "skipTo()" works similarly to "next()" and no on-disk leaves will be skipped in {{TokenTreeIterator#performSkipTo()}}.
> I think {{BounceIntersectionIterator}} should poll the range iterator with biggest current token and use it to perform skipTo() to improve performance.
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