1. COS304

2. Agenda

3.  Cloud Storage System  Scalable  Durable  Highly Available  Pay for what you use

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

7. demo

9. Block 1 Block 5 Block 3 Block 2 Block 4 Block 3 Block 2 Local file Cloud blob Block 1

11. 0 5120 0 0 0 3072 1024 3072 20484096

13. demo Goals By default – authentication required Public containers – everyone has read access SAS – share url with subset without sharing your key!

15. A ID=1 BB ID=2 Base blob = alphabets.txt #1 snapshot=2011-04- 10T19:26:24.8690267Z A ID=1 BB ID=2

16. A ID=1 BB ID=2 Base blob = alphabets.txt CCC ID=3 #2 snapshot=2011-05- 10T19:26:24.8690267 Z A ID=1 BB ID=2 CCC ID=3 #1 snapshot=2011-04- 10T19:26:24.8690267 Z A ID=1 BB ID=2 A ID=1 BB ID=2 Base blob = alphabets.txt

17. A ID=1 BB ID=2 Base blob = alphabets.txt CCC ID=3 #3 snapshot=2011-05- 10T19:28:24.8690267Z BB ID=2 CCC ID=3 A ID=1 A #2 snapshot=2011-05- 10T19:26:24.8690267 Z A ID=1 BB ID=2 CCC ID=3 #1 snapshot=2011-04- 10T19:26:24.8690267 Z A ID=1 BB ID=2

23. demo

31. Agenda

32. Single Queue/Table Partition Up to 500 transactions (entities or messages) per second Single Blob Partition Throughput up to 60 MB/s Storage Account SLA – 99.9% Availability Capacity – Up to 100 TBs Transactions – Up to 5000 entities per second Bandwidth – Up to 3 gigabits per second

33.  Distribute traffic to multiple partitions  Use multiple storage accounts  When limit is hit, app may see frequent ‘503 server busy’; applications should implement exponential back-off

34. Storage Partitioning – How to Scale? Understanding partitioning is key to understanding scale Different for each data type (blobs, entities, queues) Every data object has a partition key A partition can be served by a single server System load balances partitions based on traffic Partition key is unit of scale Load balancing can take a few minutes to kick in Can take a couple of seconds for partition to be available on a different server System load balances Our system load balances to meet your traffic needs Single partition limits have been reached Use exponential back-off on “Server Busy” Server Busy

35. Distributed File System VIP - Partition - Server Load Legend

36. Partition Keys In Each Abstraction Every blob and its snapshots are in a single partition Blobs – Container name + Blob name

37. Partition Keys In Each Abstraction Entities with same PartitionKey value are served from same partition Entities – TableName + PartitionKey

38. Partition Keys In Each Abstraction All messages for a single queue belong to the same partition Messages – Queue Name

44. www.microsoft.com/teched Sessions On-Demand & CommunityMicrosoft Certification & Training Resources Resources for IT ProfessionalsResources for Developers www.microsoft.com/learning http://microsoft.com/technet http://microsoft.com/msdn http://northamerica.msteched.com Connect. Share. Discuss.

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