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Posted to commits@cassandra.apache.org by "David Capwell (Jira)" <ji...@apache.org> on 2019/11/01 17:26:00 UTC

[jira] [Updated] (CASSANDRA-15396) RAR does not override skip or skipBytes so will do a lot of disk io when n is large

     [ https://issues.apache.org/jira/browse/CASSANDRA-15396?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Capwell updated CASSANDRA-15396:
--------------------------------------
    Change Category: Performance
         Complexity: Low Hanging Fruit
             Status: Open  (was: Triage Needed)

> RAR does not override skip or skipBytes so will do a lot of disk io when n is large
> -----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-15396
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15396
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Local/SSTable
>            Reporter: David Capwell
>            Assignee: David Capwell
>            Priority: Normal
>
> RandomAccessReader does not override skip or skipBytes which becomes a problem when the size of n (the bytes to skip) is larger than a single buffer; in these cases we can rely on seek to avoid the extra disk io.



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