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Posted to dev@flume.apache.org by "Brock Noland (JIRA)" <ji...@apache.org> on 2013/04/04 18:05:15 UTC

[jira] [Updated] (FLUME-1968) FileChannel new format while being backwards compatible

     [ https://issues.apache.org/jira/browse/FLUME-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brock Noland updated FLUME-1968:
--------------------------------

    Summary: FileChannel new format while being backwards compatible  (was: FileChannel new format)
    
> FileChannel new format while being backwards compatible
> -------------------------------------------------------
>
>                 Key: FLUME-1968
>                 URL: https://issues.apache.org/jira/browse/FLUME-1968
>             Project: Flume
>          Issue Type: Bug
>          Components: Channel, File Channel
>            Reporter: Brock Noland
>
> There are a couple issues with the current format:
> 1) We have to track the offset at checkpoint time and write the offset to a special location so we can seek to that offset during replay. In FLUME-1516 we are tracking two offsets.
> 2) We have no way to detect partial writes FLUME-1967
> 3) We can only checksum the body of the event, not the entire record FLUME-1485 and therefore cannot detect corruption outside an event body.

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