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RAMCloud was designed and optimized for scale (hundreds or thousands of servers). All of RAMCloud's (admittedly simpler) operations work at scale, and performance is not impacted. Scaling in RAMCloud is transparent: clients do not need to be aware of the size of the system. In some ways, RAMCloud gets better as it gets larger: for example, crash recovery from a failed server gets faster as the cluster size increases.
Durability
Redis' durability model is relatively weak:
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