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Improves the time of searching and inserting a range of keys.

Proposed plan

Phase 1: Update new keys.

• Implement insertDataRows operation in FreeList: insert batch of datarows at once.
• Implement invokeAll operation in BPlusTree: support search and insert batch of keys.
• Enable batch insertion of keys in preloader (enabled by special system property).

Phase 2: Update existing keys.

• InvokeAll operation should support batch update of existing keys.

Phase 3: Support DataStreamer.

• Add support for batch updates in DataStreamer (isolated updater).

Phase 4: Support putAll.

• Add support for batch updates in IgniteCache.putAll.

Phase 5: MVCC support.

• Add support for MVCC (TRANSACTIONAL_SNAPSHOT) cache mode.

Risks and Assumptions

// Describe project risks, such as API or binary compatibility issues, major protocol changes, etc.

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