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From "Paulo Motta (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-11412) Many sstablescanners opened during repair
Date Wed, 13 Apr 2016 00:17:25 GMT


Paulo Motta commented on CASSANDRA-11412:

Thanks for the explanation [~krummas]. I agree this will not be a big win right now and we
can do this improvement in the future if the need arises.

Test and code looks good, marking as ready to commit.

> Many sstablescanners opened during repair
> -----------------------------------------
>                 Key: CASSANDRA-11412
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>             Fix For: 3.0.x, 3.x
> Since CASSANDRA-5220 we open [one sstablescanner per range per sstable|].
If compaction gets behind and you are running vnodes with 256 tokens and RF3, this could become
a problem (ie, {{768 * number of sstables}} scanners)
> We could probably refactor this similar to the way we handle scanners with LCS - only
open the scanner once we need it

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