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Posted to common-dev@hadoop.apache.org by "Anoop Sam John (Jira)" <ji...@apache.org> on 2020/05/12 19:01:00 UTC

[jira] [Created] (HADOOP-17038) Support positional read in AbfsInputStream

Anoop Sam John created HADOOP-17038:
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             Summary: Support positional read in AbfsInputStream
                 Key: HADOOP-17038
                 URL: https://issues.apache.org/jira/browse/HADOOP-17038
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Anoop Sam John
            Assignee: Anoop Sam John


Right now it will do a seek to the position , read and then seek back to the old position.  (As per the impl in the super class)
In HBase kind of workloads we rely mostly on short preads. (like 64 KB size by default).  So would be ideal to support a pure pos read API which will not even keep the data in a buffer but will only read the required data as what is asked for by the caller. (Not reading ahead more data as per the read size config)



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