Branimir Lambov created CASSANDRA-12921:
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Summary: 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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