kvserver: [dnm] add TestFlowControlSendQueueRangeSplitMerge test (picked) #136495
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…geController This is used to set the highest index up to which all send-queues in pull mode must be force-flushed. Informs cockroachdb#135601 Epic: CRDB-37515 Release note: None
- ReplicatedEvalResult.DoTimelyApplicationToAllReplicas is added and set in splitTriggerHelper, MergeTrigger, Migrate, Subsume. - The previous setting to true is gated on cluster version V25_1_AddRangeForceFlushKey. - This causes ReplicaState.ForceFlushIndex to be set, and RangeForceFlushKey (a replicated range-id local key) to be written when applying the corresponding batch to the state machine. The index is set to the index of the entry being applied, and is monotonically increasing. - replica_rac2.Processor and rac2.RangeController have existing ForceFlushIndexChangedLocked methods that are called whenever the Replica sees a change in the force-flush-index. Fixes cockroachdb#135601 Epic: CRDB-37515 Release note: None
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kvoli
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Add a new rac2 flow control integration test, `TestFlowControlSendQueueRangeSplitMerge`. This test takes the following steps: ```sql -- We will exhaust the tokens across all streams while admission is blocked on -- n3, using a single 4 MiB (deduction, the write itself is small) write. Then, -- we will write a 1 MiB put to the range, split it, write a 1 MiB put to the -- RHS range, merge the ranges, and write a 1 MiB put to the merged range. We -- expect that at each stage where a send queue develops n1->s3, the send queue -- will be flushed by the range merge and range split range operations. ``` Part of: cockroachdb#132614 Release note: None
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#136258 ontop of #136330