More memory consumed in cluster mode, one suggestion.

[yvette903]

As we kown, in cluster mode, all keys are inserted into the radix tree. In a test case we insterted one million keys in one slot and every key consists of 256 randomized characters, a node in cluster mode would consumed 300MB more memory than in normal mode. Have you considered using key’s memory address instead of the key itself in radix tree？It will save much ram.