8. Data centers

9. Account Container Blobs Table Entities Queue Messages https://.blob.core.windows.net/ https://.table.core.windows.net/ https://.queue.core.windows.net/

13. Design Goals

14. Storage Stamp LB Storage Location Service Storage Location Service Access blob storage via the URL: http://.blob.core.windows.net/ Data access Partition Layer Front-EndsFront-Ends DFS Layer Intra-stamp replication Storage Stamp LB Partition Layer Front-EndsFront-Ends DFS Layer Intra-stamp replication Inter-stamp (Geo) replication

15. Index Partition Layer

18. Index

19. Partition Layer

24. Europe West North Europe Geo-replication South Central US North Central US Geo-replication East Asia South East Asia Geo-replication West US East US Geo-replication

25. West US Azure DNS http://account.blob.core.windows.net/ DNS lookup Data access HostnameIP Address account.blob.core.windows.netWest US Failover Update DNS East US Geo-replication

30. Windows Azure Storage

37. 1.0 true true 7

39. GET,PUT * 180

49. XL VM Uploading 512, 256MB Blobs (Total upload size = 128GB) C=1, P=1 => Averaged ~ 13. 2 MB/s C=1, P=30 => Averaged ~ 50.72 MB/s C=30, P=1 => Averaged ~ 96.64 MB/s Single TCP connection is bound by TCP rate control & RTT P=30 vs. C=30: Test completed almost twice as fast! Single Blob is bound by the limits of a single partition Accessing multiple blobs concurrently scales

50. XL VM Downloading 50, 256MB Blobs (Total download size = 12.5GB) C=1, P=1 => Averaged ~ 96 MB/s C=30, P=1 => Averaged ~ 130 MB/s