Pause ingestion based on resource utilization
Pause and Un-pause Ingestion based on Resource Utilization
A new capability has been added to Pinot to pause and un-pause ingestion based on resource utilization. This feature is designed to help users manage their Pinot clusters more effectively by pausing ingestion when resource utilization exceeds a specified threshold. Ingestion is un-paused when resource utilization falls below the threshold.
How It Works
The periodic task ResourceUtilizationChecker runs periodically and computes the disk usage info of the Pinot server instances. The periodic task RealTimeSegmentValidationManager utilizes the disk usage info captured by the ResourceUtilizationChecker task and pauses consumption on REALTIME tables if disk utilization is above the threshold. The RealTimeSegmentValidationManager task would un-pause ingestion when disk utilization falls below the threshold. The periodic task PinotTaskManager utilizes the disk usage info and prevents minion based task generation if disk utilization is above threshold. The PinotTaskManager task would allow minion based task generation when disk utilization falls below the threshold.
Configuration
The following configurations are available to control this feature:
controller.resource.utilization.checker.frequency
300
Value is in seconds. The disk utilization is computed for all Pinot servers in this frequency. Setting the value to -1 would disable the disk usage computation.
controller.disk.utilization.path
/home/pinot/data
Disk utilization is calculated for this path.
controller.disk.utilization.threshold
0.95
Value should be between 0 and 1.
controller.enable.resource.utilization.check
false
The feature is off by default.
Metrics
The metric pinot_controller_resourceUtilizationLimitExceeded_Value would be set to 1 when disk utilization is above the threshold. The metric would be set to 0 when disk utilization is below the threshold.
FAQs
Is controller restart required after changing any of the configuration properties?
Yes, update the property to the desired value and restart the controller(s).
Does ResourceUtilizationChecker run only on the lead controller?
The periodic task ResourceUtilizationChecker runs on all controllers. The controller periodic tasks RealtimeSegmentValidationManager and PinotTaskManager runs only on the lead controller.
How to identify the Pinot servers that are low on disk capacity?
Grep for the keyword Disk utilization for server on any Pinot controller log to find the relevant servers.
References
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