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Posted to commits@cassandra.apache.org by "Jordan West (JIRA)" <ji...@apache.org> on 2019/08/05 16:41:00 UTC
[jira] [Updated] (CASSANDRA-15259) Selecting Index by Lowest Mean
Column Count Selects Random Index
[ https://issues.apache.org/jira/browse/CASSANDRA-15259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jordan West updated CASSANDRA-15259:
------------------------------------
Description:
{{CassandraIndex}} uses [{{ColumnFamilyStore#getMeanColumns}}|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/index/internal/CassandraIndex.java#L273], average columns per partition, which always returns the same answer for index CFs because they contain no regular columns and clustering columns aren't included in the count in Cassandra 3.0+.
was:
{{CassandraIndex}} uses {{[ColumnFamilyStore#getMeanColumns|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/index/internal/CassandraIndex.java#L273], average columns per partition, which always returns the same answer for index CFs because they contain no regular columns and clustering columns aren't included in the count in Cassandra 3.0+.}}
> Selecting Index by Lowest Mean Column Count Selects Random Index
> ----------------------------------------------------------------
>
> Key: CASSANDRA-15259
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15259
> Project: Cassandra
> Issue Type: Bug
> Components: Feature/2i Index
> Reporter: Jordan West
> Assignee: Jordan West
> Priority: Normal
>
> {{CassandraIndex}} uses [{{ColumnFamilyStore#getMeanColumns}}|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/index/internal/CassandraIndex.java#L273], average columns per partition, which always returns the same answer for index CFs because they contain no regular columns and clustering columns aren't included in the count in Cassandra 3.0+.
>
>
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