1. Samza
  2. SAMZA-2

Fine-grain control over stream consumption


    • Type: Bug Bug
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.6.0
    • Fix Version/s: 0.7.0
    • Component/s: container
    • Labels:


      Currently, samza exposes configuration in the form of "streams.%s.consumer.max.bytes.per.sec" for throttling the # of bytes the Task will read from a stream. This is a feature request for programmatic fine-grain control over stream consumption. The use-case is a samza task that will be consuming multiple streams where some streams may be from live systems that have stricter SLA requirements and must always be prioritized over other streams that may be from batch systems. The above configuration is not the ideal way to express this type of stream prioritization because configuring the "batch" streams with a low consumption rate will decrease the overall throughput of the system when there is no data in the "live" streams. Furthermore, we'll want to throttle each "batch" stream based on external signals that can change over time. Because of the dynamic nature of these external signals, we would like to have a programmatic interface that can dynamically change the prioritization as the signal changes.

      Review board:

      1. SAMZA-2.0.patch
        23 kB
        Chris Riccomini
      2. SAMZA-2.1.patch
        28 kB
        Chris Riccomini
      3. SAMZA-2.2.patch
        99 kB
        Chris Riccomini
      4. SAMZA-2.3.patch
        92 kB
        Chris Riccomini
      5. SAMZA-2.4.patch
        97 kB
        Chris Riccomini
      6. SAMZA-2.5.patch
        120 kB
        Chris Riccomini
      7. DESIGN-SAMZA-2-0.pdf
        177 kB
        Chris Riccomini
        22 kB
        Chris Riccomini

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            • Assignee:
              Chris Riccomini
              Chris Riccomini
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