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From "Jason Brown (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10681) make index building pluggable via IndexBuildTask
Date Tue, 17 Nov 2015 22:07:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15009660#comment-15009660
] 

Jason Brown commented on CASSANDRA-10681:
-----------------------------------------

+1

> make index building pluggable via IndexBuildTask
> ------------------------------------------------
>
>                 Key: CASSANDRA-10681
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10681
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Local Write-Read Paths
>            Reporter: Pavel Yaskevich
>            Assignee: Pavel Yaskevich
>            Priority: Minor
>              Labels: sasi
>             Fix For: 3.x
>
>
> Currently index building assumes one and only way to build all of the indexes - through
SecondaryIndexBuilder - which merges all of the sstables together, collates columns etc. Such
works fine for built-in indexes but not for SASI since it's attaches to every SSTable individually.
We need a "IndexBuildTask" interface (based on CompactionInfo.Holder) to be returned from
Index on demand to give power to SI interface implementers to decide how build should work.
This might be less effective for CassandraIndex, since this effectively means that collation
will have to be done multiple times on the same data, but  nevertheless is a good compromise
for clean interface to outside world.



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