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From "Kim van der Riet (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-6043) [linearstore] Add a configuration option to overwrite files returned to the EFP
Date Mon, 25 Aug 2014 20:14:58 GMT
Kim van der Riet created QPID-6043:
--------------------------------------

             Summary: [linearstore] Add a configuration option to overwrite files returned
to the EFP
                 Key: QPID-6043
                 URL: https://issues.apache.org/jira/browse/QPID-6043
             Project: Qpid
          Issue Type: Improvement
          Components: C++ Broker
            Reporter: Kim van der Riet
            Assignee: Kim van der Riet


The linearstore returns used files to the Empty File Pool when they are no longer in use in
a journal. Under normal use, the header of the file is reset (partly overwritten so that it
cannot again be used with any journal), and a new header written when the file is once again
used in a journal. However, the data within the journal remains. The header structure, particularly
the use of serial numbers in the file and record headers, and the use of record checksums
guarantee that old data can never be recovered as part of a newer journal.

However, as an added security feature, an option which will completely erase the data content
of the file would be useful. This comes with a performance penalty, which will have to be
quantified when a solution is proposed.

The proposed linearstore option is:
{noformat}--overwrite-before-return [true|yes|1]{noformat}



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