A summary of day 2 of the LEAP conference in Redmond, Seattle
Pharma in the Cloud
With Eugenio Pace
Windows Azure Primitives:
- Code host
- WCF
- ASP.Net
- Worker
- Similar to a windows service in an on-premises application
- Persistence
- Table
- Blob
- Queue
- Events can be published to the queue, and Workers can handle these events
- SQL Data Services
- Supports most of the functionality of the regular SQL Servers
- Funtionality has been significantly extended since the PDC08 demo
- Application Services
- ACS (access control)
- ServiceBus
- Workflow
Cloud vs. on premises and build vs. buy
Building a multi-enterprise collaboration application in the cloud for “BigPharma”
- Requirements:
- De-centralized management
- Fine grained access control
- Leveraging existing Identity and AuthZ infrastructure
- Using Active Directory (local users/groups used in demo)
- Support Single Sign On
Demo: http://pharmacloudcatalog.com/catalog/Provisioning
- Identity & Access Control
- Using claims-based identity
- Both for the web service and for the web site
- Using MS Geneva Framework
- Identity providers for ASP.Net exists which support this framework
- Custom Security Token Service (STS)
- Mapping tokens to permissions can be done in the web interface of .Net Services Access Control Service
- ServiceBus
- Enables communication from the server to the client without requiring an inbound connection to the client (all connection from client/server are outbound – to the service bus)
Download & study sample for Azure (note: a different samle than the one demonstrated in this session) http://www.codeplex.com/azureissuetracker
Microsoft Dynamics CRM
With Girish Raja
Dynamics CRM 4.0 demo
- The Outlook CRM add-in client
- Appears as a separate folder in Outlook
- Data available offline
- Flexibility
- Accessing by browser, Otulook or mobile
- Hosting as software or as service
- Extensibility Toolset – customization tools for
- System Administrators
- Developers
- Business Analysts
- Configurable entity model
- Create entities (similar to database tables) from the Customization screen in Dynamics CRM Online
- The asmx web service endpoints are automatically updated with the custom entities
- Configurable role based access with high granularity
- Workflow editor
- Uses Windows Workflow internally
- Activities can be created in the web interface
.NET Service Bus
With Clemens Vasters
- Demo application where a website in the cloud communicates with an application running on premises (on Clemens’ laptop) through the .NET Service Bus
- No need to configure firewalls
- Security kept intact
- Why .NET Service Bus?
- Enable bi-directional connectivity
- Not depended on the kind of device or the location of the device
- Without having to open inbound firewall/NAT ports
- Provide federated naming and discovery
- The first version of the service bus (will be released with Azure in November 2009), will use Windows Workflow from .NET 3.5, with an DSL on the top for supporting migration to .NET 4.0
- NetTcpBinding is the preferred one for optimal performance
- Service Bus Naming
- Hierarchical structure, similar to DNS
- Updates takes effect immediately
- Naming scheme: scheme://solution.servicebus.windows.net/name/…
- What’s wrong with DNS?
- High latency for updates
- Names hosts, not services
- Service Registry
- A registry for service endpoints
- Services can be categorized (eg. printers can be organized into a separate category)
- Service Bus Messaging
- Based on WCF
- Not supported:
- Atomic transaction flow
- Protocol level transport authentication
More information about Service Bus on MSDN: http://msdn.microsoft.com/en-us/library/dd582728.aspx
SQL Data Services – Under The Hood
With Gopal Kakivaya
Motivation
- Database as a service
- Pay-as-you-go model
- Guaraneed SLA
- Familiar relational programming model
- Leverage existing skills and tools
- This is new compared to the PDC08 version
- Full control of the logical database administration
- The physical aspects of the database administration is handled by the service provider
Concepts
- Database Provisioning Model
- Account
- Each account as one or more servers
- Server
- Database
- Connection Model
- Clients connect directly to a database
- Security Model
- Uses regular SQL security model
- Future: AD Federation, etc
Architecture
- Components
- Master node
- Data Nodes
- SQL Server
- Replication Agent
- Local Partition Map
- Fabric
- Reconfiguration Agent
- PM Location Resolution
- Failure detector
- Ring Topology
One partition is set as partition, and one or more secondary partitions are located on other data nodes.
- Partitioning
- Provides better fault tolerance
- Failed partions can be rebuilt faster
- Eg. if the database is divided into 10 partitions, it’s much faster to rebuild the failed partition than the entire database
- Fault tolerance
- Security built into the software
- Signed data, eg. will detect if the network card has corrupted the data
- Can be used on cheap hardware
- If anything fails (eg. a disk), the faulted hardware will automatically be shut down
- This is made possible by the use of replica sets
- Replication
- Reads are completed at the primary
- Writes are replicated to all nodes
- The primary partition will wait for acknowledges from the secondaries
- All writes, both to the primary and to the secondaries are part of the transaction
- The replication factor may be configured, based on the customer’s demand
- “Replication factor of 4” means that there are 1 primary and 3 secondaries
- Reconfiguration
- As machines die, new machines must take their place
- Types of reconfiguration
- Primary failover
- Removing a failed secondary
- Might be temporary, eg. because of an update made to the machine.
- The secondary will not be replaced immediately, since it might be temporarly down
- Adding recovered replica
- Building a new secondary
Etiketter: Azure, LEAP
