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https://issues.apache.org/jira/browse/CASSANDRA-12921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15674682#comment-15674682
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Jonathan Ellis commented on CASSANDRA-12921:
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IMO we should be optimizing for SSD now, not HDD.
> Parallel opening of sstables slows down startup
> -----------------------------------------------
>
> Key: CASSANDRA-12921
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12921
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Branimir Lambov
> Priority: Minor
>
> [{{SSTableReader.openAll}}|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java#L545],
> used by initial startup, spawns multiple threads to open sstables.
> This is a bad idea as the longest step in the opening process is the loading
> of bloom filters and when this is done in parallel the drives have to do a
> lot of unnecessary seeking.
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