You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2016/02/03 23:42:39 UTC

[jira] [Created] (HIVE-12995) LLAP: Synthetic file ids need collision checks

Gopal V created HIVE-12995:
------------------------------

             Summary: LLAP: Synthetic file ids need collision checks
                 Key: HIVE-12995
                 URL: https://issues.apache.org/jira/browse/HIVE-12995
             Project: Hive
          Issue Type: Bug
          Components: llap
    Affects Versions: 2.1.0
            Reporter: Gopal V


LLAP synthetic file ids do not have any way of checking whether a collision occurs other than a data-error.

Synthetic file-ids have only been used with unit tests so far - but they will be needed to add cache mechanisms to non-HDFS filesystems.

In case of Synthetic file-ids, it is recommended that we track the full-tuple (path, mtime, len) in the cache so that a cache-hit for the synthetic file-id can be compared against the parameters & only accepted if those match.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)