微软云计算讲解.ppt
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* Slide Objectives: Show Microsoft’ continuous Private to Public Cloud Offering, but this presentation will focus on Microsoft’s relational database PaaS offering. Transition: Microsoft provides a continuous solution from private cloud to the public cloud. No matter where you are on your technology roadmap we have a solution to fit your needs. We are a trusted advisor and platform in the traditional enterprise and ISV space with new IaaS offerings that making it easier to bring this same level of trust and ease of use to the public cloud. However, Windows Azure SQL Database extends SQL Server capabilities to the cloud by offering SQL Server as a relational database service. Speaking Points: Announced New IaaS offering in June SQL Database provides SQL Server as a relational service. Notes: * * Slide ObjectiveExplains the multiple replica mechanism for HA Speaker Notes SQL Azure is a high availability database Always three transaction consistent replicas of the database One primary replica; two slave replicas Failure of a replica will result in another replica being spun up immediately by the fabric Failure of the primary replica means a slave replica will become the primary and a new slave will spin up Minimal down time Typically just a few dropped connections Easy to code for the failover scenario- if you are ding god connection management and error handling will be fine Clustered index required on all tables to allow replication Notes Useful article from SQL Azure team /en-us/magazine/ee321567.aspx * * Slide ObjectiveExplain the architecture of SQL Azure in a diagrammatic form Speaker Notes Access is via a load balancer- load balancer is a sticky (stateful) load balancer Gateway nodes appear to TDS client as a SQL Server, but, merely forward requests through to the underlying SQL servers that actually store the data Requests are routed to a primary replica- more on replicas shortly Shared infrastructure at SQL database and below Each user database is rep
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