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Posted to commits@cassandra.apache.org by "Avi Kivity (Jira)" <ji...@apache.org> on 2020/12/17 10:20:00 UTC

[jira] [Created] (CASSANDRA-16360) CRC32 is inefficient on x86

Avi Kivity created CASSANDRA-16360:
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             Summary: CRC32 is inefficient on x86
                 Key: CASSANDRA-16360
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16360
             Project: Cassandra
          Issue Type: Improvement
          Components: Messaging/Client
            Reporter: Avi Kivity


The client/server protocol specifies CRC24 and CRC32 as the checksum algorithm (cql_protocol_V5_framing.asc). Those however are expensive to compute; this affects both the client and the server.

 

A better checksum algorithm is CRC32C, which has hardware support on x86 (as well as other modern architectures).



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