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Posted to commits@cassandra.apache.org by "Alexey Zotov (Jira)" <ji...@apache.org> on 2021/04/25 08:20:00 UTC

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

     [ https://issues.apache.org/jira/browse/CASSANDRA-16360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Zotov reassigned CASSANDRA-16360:
----------------------------------------

    Assignee: Alexey Zotov

> 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
>            Assignee: Alexey Zotov
>            Priority: Normal
>              Labels: protocolv5
>             Fix For: 4.0.x
>
>
> 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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