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https://issues.apache.org/jira/browse/FLINK-10431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16663662#comment-16663662
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ASF GitHub Bot commented on FLINK-10431:
----------------------------------------
StefanRRichter commented on a change in pull request #6898: [FLINK-10431]
Extraction of scheduling-related code from SlotPool into preliminary Scheduler
URL: https://github.com/apache/flink/pull/6898#discussion_r228147167
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/jobmaster/slotpool/SlotPoolGateway.java
##########
@@ -145,17 +149,61 @@
* <p>If the returned future must not be completed right away (a.k.a.
the slot request
* can be queued), allowQueuedScheduling must be set to true.
*
+ * @deprecated this method will be removed once the handling of slot
sharing is completely extracted from the slot
+ * pool into a dedicated {@link Scheduler} component. The call is then
replaced by calls to
+ * {@link #getAvailableSlotsInformation()}, {@link
#allocateAvailableSlot(SlotRequestId, AllocationID)}, and
+ * {@link #requestNewAllocatedSlot(SlotRequestId, ResourceProfile,
Time)}.
+ *
* @param slotRequestId identifying the requested slot
* @param scheduledUnit for which to allocate slot
* @param slotProfile profile that specifies the requirements for the
requested slot
* @param allowQueuedScheduling true if the slot request can be queued
(e.g. the returned future must not be completed)
* @param timeout for the operation
* @return Future which is completed with the allocated {@link
LogicalSlot}
*/
+ @Deprecated
CompletableFuture<LogicalSlot> allocateSlot(
SlotRequestId slotRequestId,
ScheduledUnit scheduledUnit,
SlotProfile slotProfile,
boolean allowQueuedScheduling,
@RpcTimeout Time timeout);
+
+ /**
+ * Returns a list of {@link SlotInfo} objects about all slots that are
currently available in the slot
+ * pool.
+ *
+ * @return a list of {@link SlotInfo} objects about all slots that are
currently available in the slot pool.
+ */
+ @Nonnull
+ List<SlotInfo> getAvailableSlotsInformation();
+
+ /**
+ * Allocates the available slot with the given allocation id under the
given request id. This method returns
+ * {@code null} if no slot with the given allocation id is available.
+ *
+ * @param slotRequestId identifying the requested slot
+ * @param allocationID the allocation id of the requested available slot
+ * @return the previously available slot with the given allocation id
or {@code null} if no such slot existed.
+ */
+ @Nullable
+ AllocatedSlot allocateAvailableSlot(
Review comment:
In general, I like the idea, but I wonder how this is easily possible? For
this methods, I agree but the interface also has `requestNewAllocatedSlot`
which also exposes `AllocatedSlot` and typically is followed by attempts to
assign payload.
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> Extract scheduling-related code from SlotPool
> ---------------------------------------------
>
> Key: FLINK-10431
> URL: https://issues.apache.org/jira/browse/FLINK-10431
> Project: Flink
> Issue Type: Sub-task
> Components: Distributed Coordination
> Affects Versions: 1.7.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Labels: pull-request-available
>
> The other half of the current scheduling logic is the management of slot
> sharing and is located in the SlotPool. We need to extract this logic into
> our new Scheduler component from the previous step. This leaves us with a
> simpler SlotPool that mainly cares about obtaining, holding, and releasing
> slots in interaction with a ResourceManager. The new Scheduler can now
> identify slot sharing groups and interacts with the SlotPool.
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