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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2835) Track explicit lengths of WALs for more accurate reporting
Date Fri, 23 May 2014 02:10:01 GMT
Josh Elser created ACCUMULO-2835:
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             Summary: Track explicit lengths of WALs for more accurate reporting
                 Key: ACCUMULO-2835
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2835
             Project: Accumulo
          Issue Type: Improvement
          Components: replication
            Reporter: Josh Elser
            Assignee: Josh Elser
            Priority: Minor


Presently, during the normal ingest path, the length of each WAL isn't explicitly tracked.
In practice, it isn't necessary because we can read until the end of the file (EOFException)
and track progress only from the beginning. 

This makes the bookkeeping easier, but it's then hard to assert intra-file progress for replication.
The only accurate metric that can be made is the number of files needing replication, while
the size actual amount of data that needs to be sent over the wire is unknown without reading
the file to get the length in number of records.



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