[BFTree] Add RangeIndex cluster migration#1731

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Commits on May 26, 2026

Add RangeIndex cluster migration with sketch protection

Tiago Napoli
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Rename MigrationReceiveSession.cs to RangeIndexMigrationReceiveSession.cs

Tiago Napoli
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Address PR review feedback for RangeIndex migration

Tiago Napoli
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Fix COPY option comment and restore key logging in RangeIndex migration

Tiago Napoli
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Expand COPY option comment with crash recovery requirements

Tiago Napoli
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Add using System.Text and simplify log messages in MigrateOperation

Tiago Napoli
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Refactor TransmitKeysAsync to use single HashSet<byte[]> skip set

Tiago Napoli
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Refactor migration key discovery to use PinnedSpanByte and callback

Tiago Napoli
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Update DeleteRangeIndex doc comment to reflect COPY not yet supported

Tiago Napoli
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Rename keyPsb to key in VectorManager.Migration.cs

Tiago Napoli
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Switch test classes to TestBase and minor comment cleanup

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Align Migration.cs with current main APIs and update migration docs

Tiago Napoli
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Add TRYAGAIN response for RI commands during migration and fix build errors

Tiago Napoli
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Lazy-init RangeIndex migration receive state and add documentation

Tiago Napoli
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Clean up TRYAGAIN parameter threading and fix double dispose

Tiago Napoli
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Remove unnecessary comment about source key deletion

Tiago Napoli
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Add cancellation token support to RangeIndex migration

Tiago Napoli
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Include key name in snapshot failure log message

Tiago Napoli
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Simplify TransmitRangeIndexAsync error handling

Tiago Napoli
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Improve TransmitRangeIndexAsync log messages: add key and fix prefixes

Tiago Napoli
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Add CancellationToken parameter to TransmitRangeIndexAsync

Tiago Napoli
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Add CancellationToken parameter to MigrateRangeIndexKeysAsync

Tiago Napoli
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Add method name and key to all log messages in MigrateSession.RangeIndex.cs

Tiago Napoli
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Fix unsafe use of FromPinnedSpan on unpinned byte array

Tiago Napoli
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Simplify DeleteRangeIndex call: remove temp variable

Tiago Napoli
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Fix SnapshotForMigration to take PinnedSpanByte and pin key in caller

Tiago Napoli
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Fix unpinned FromPinnedSpan in PublishMigratedIndex

Tiago Napoli
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Refactor migration temp directory: create once in constructor

Tiago Napoli
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Fix migration reads to use Read_RangeIndex to suppress CTT

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Eliminate TOCTOU: read authoritative stub in SnapshotForMigration

Tiago Napoli
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Remove TRYAGAIN changes from bftree-migration branch

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Add RI migration fault injection tests and observability logging

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Refactor migration observability into metric structs

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Make metric struct fields public and use space-separated log format

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Extract metric structs into Server/Migration/RangeIndex/ folder

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Initialize RangeIndexMigrationReceiveState in ClusterSession constructor

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Remove redundant isReceiving field, derive from currentDeserializer != null

Tiago Napoli
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Add thread-safety documentation to Reset() addressing review comment

Tiago Napoli
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Use WaitForSnapshot pattern in SnapshotForMigration instead of spin-wait

Tiago Napoli
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