azagrebin commented on a change in pull request #10146: [FLINK-14188][runtime]
TaskExecutor derive and register with default slot resource profile
URL: https://github.com/apache/flink/pull/10146#discussion_r348339785
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File path:
flink-core/src/main/java/org/apache/flink/configuration/TaskManagerOptions.java
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@@ -136,6 +138,20 @@
" is typically proportional to the number of
physical CPU cores that the TaskManager's machine has" +
" (e.g., equal to the number of cores, or half
the number of cores).");
+ /**
+ * Fraction of TaskExecutor resources a default slot should take for
slot requests with unknown resource profiles.
+ */
+ @Documentation.CommonOption(position =
Documentation.CommonOption.POSITION_PARALLELISM_SLOTS)
+ public static final ConfigOption<Float> DEFAULT_SLOT_FRACTION =
+ key("taskmanager.default-slot-fraction")
+ .defaultValue(-1.0f)
+ .withDescription("For operator or user function
instances that do not specify their resource requirements,"
+ + " we use this fraction to decide how many
resources of the task executor each slot should take. A"
+ + " default slot should have the configured
fraction of the task executor resources on all resource"
+ + " dimensions (CPU, Memory). If the fraction
is not explicitly configured (or configured with negative"
+ + " values), it will be derived from the legacy
config option '"
+ + NUM_TASK_SLOTS.key() + "'.");
Review comment:
Maybe we could shortly but explicitly mention that it will be
`1/NUM_TASK_SLOTS`
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