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  • General purpose transactions (may operate over any keys in the database at once)
  • Strict-serializable isolation
  • Optimal latency: one wide area round-trip for all transactions under normal conditions
  • Optimal failure tolerance: latency and performance should be unaffected by any minority of replica failures
  • Scalability: there should be no bottleneck introduced
  • Should have no intrinsic limit to transaction complexity
  • Must work on commodity hardware
  • Must support live migration from Paxos

User Impact

Grammatically correct CQL Batches (including unconditional batches) on transactional tables will receive ACID properties, and grammatically correct conditional batch operations that would be rejected for operating over multiple CQL partitions will now be supported, e.g.

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