SkipGraph

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The document describes SkipGraph, a distributed hash table based on SkipLists. SkipGraph uses a SkipList data structure to store key-value pairs and distribute them across nodes through consistent hashing of keys to nodes. SkipGraph assigns each node a membership vector that describes which keys it stores, allowing efficient lookups of O(log n) by routing queries through nodes with overlapping membership vectors.

Technology

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9 SkipGraph
? CPU: Core i5 2.66Ghz
? : 1GbE Ethernet

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SkipGraph

1. SkipGraph

2. Web

3. ? ? ?

4. ? Hash

5. SkipGraph ? SkipGraph SkipList ?

6. SkipList ListSet O(log n) ?

7. SkipList ? Level 4 23 Level 3 23 47 Level 2 23 39 47 68 Level 1 23 39 42 47 53 68 Level 0 23 39 42 47 53 68

8. SkipList ? 53? Level 4 23 Level 3 23 47 Level 2 23 39 47 68 Level 1 23 39 42 47 53 68 Level 0 23 39 42 47 53 68

9. SkipList ? 23 23 47 23 39 47 68 23 39 42 47 53 68 23 39 42 47 53 68

10. SkipGraph SkipList ? ? ?

11. SkipGraph 23 39 42 47 53 68

12. SkipGraph membership vector ? 2 Level 0 23 39 42 47 53 68 00 10 00 11 10 01

13. SkipGraph membership vector ? 1 1 2 2 ? n log n 47 Level 2 39 53 23 42 68 39 47 53 Level 1 23 42 68 Level 0 23 39 42 47 53 68 00 10 00 11 10 01

14. SkipGraph 47 Level 2 39 53 23 42 68 39 47 53 Level 1 23 42 68 Level 0 23 39 42 47 53 68 00 10 00 11 10 01

15. SkipGraph SkipGraph SkipList SkipList 68? Level 2 39 53 39 47 53 Level 1 Level 0 23 39 42 47 53 68 00 10 00 11 10 01

16. SkipGraph 40 70 53 70 Level 2 39 53 47 52 39 47 53 Level 1 Level 0 23 39 42 47 53 68 00 10 00 11 10 01

17. 9 SkipGraph ? CPU: Core i5 2.66Ghz ? : 1GbE Ethernet

18. 600 (query/sec) ( )

狠狠撸

SkipGraph

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