[S4-99] Provide injectable load shedding mechanism

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6
• Assignee: Unassigned
• Reporter: Matthieu Morel
• Created: 28/Aug/12 17:09
• Updated: 25/Feb/13 15:22
• Resolved: 25/Feb/13 15:22

Description

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.

Issue Links

• Is contained by: S4-95 Performance improvements