Karol Brejna created GEARPUMP-149:
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Summary: Binding tasks to workers
Key: GEARPUMP-149
URL: https://issues.apache.org/jira/browse/GEARPUMP-149
Project: Apache Gearpump
Issue Type: Improvement
Reporter: Karol Brejna
Priority: Minor
Let's assume that we have a cluster with some "specialized" nodes (for
example a worker on IoT device that is responsible for controlling some
actuators, dedicated workers to achieve data locality, some hardware
specific - mem/cpu - tasks, etc.).
There should be a way to "hint" Gearpump to prefer some nodes (workers) over
others for certain tasks (executors).
We already have "localities" feature. Developer can add a configuration (when
submitting the application) to bind a task with a worker:
{code}
gearpump {
streaming {
localities {
app1: { //This is the application name to be submitted
workerId: [ //The worker id where to launch Task0_0 and Task0_1
TaskId(0,0), TaskId(0,1)
]
}
}
}
}
{code}
The problem is: users have no idea what each Task's task ID is (especially if
there are lots of nodes in a DAG).
We could introduce more flexible "binding" mechanism, for example labeling
tasks and workers or using some other "awareness" algorithm.
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