Kalpit Shah created SPARK-1972:
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Summary: Add support for tracking custom metrics in TaskMetrics
Key: SPARK-1972
URL: https://issues.apache.org/jira/browse/SPARK-1972
Project: Spark
Issue Type: Improvement
Affects Versions: 0.9.1
Reporter: Kalpit Shah
Various RDDs may want to track custom metrics for improved monitoring and
performance tuning. For e.g.:
1. A Task involving a JdbcRDD may want to track some metric related to JDBC
execution.
2. A Task involving a user-defined RDD may want to track some metric specific
to user's application.
We currently use TaskMetrics for tracking task-related metrics, which provides
no way of tracking custom task-related metrics. It is not good to introduce a
new field in TaskMetric everytime we want to track a custom metric. That
approach would be cumbersome and ugly. Besides, some of these custom metrics
may only make sense for a specific RDD-subclass. Therefore, we need TaskMetrics
to provide a generic way to allow RDD-subclasses to track custom metrics when
computing partitions.
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