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From "Matthieu Morel (JIRA)" <j...@apache.org>
Subject [jira] [Created] (S4-99) Provide injectable load shedding mechanism
Date Tue, 28 Aug 2012 17:10:07 GMT
Matthieu Morel created S4-99:
--------------------------------

             Summary: Provide injectable load shedding mechanism
                 Key: S4-99
                 URL: https://issues.apache.org/jira/browse/S4-99
             Project: Apache S4
          Issue Type: Improvement
            Reporter: Matthieu Morel


The main queues in S4 are the NIO buffer and the Stream event queue. The stream event queue
is a good place for implementing various load shedding strategies, because metadata is available
from the EventMessage class.

Currently, the default mechanism is avoid load shedding by using a blocking write operation
on the stream queue. We already experiment alternatives (see S4-62), but the best way would
be a pluggable mechanism.

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