 Sriram Krishnan Program Manager Microsoft Corporation ES03

Act I Architecture

Big, reliable, expensive machine

... <add name="TableStorageSessionStateProvider“ type= "Microsoft.Samples.ServiceHosting.AspProviders.TableStorageSession StateProvider" applicationName=“Foo” />

Default.aspx (Input + Making Coffee) LB

public partial class _Default : System.Web.UI.Page { protected void Button1_Click(object sender,EventArgs e) { var order = txtOrder.Text; ProcessOrder(order); } protected void ProcessOrder(string order) { //Make some coffee!... }

Default.aspx (Input) Windows Azure Queues LB Worker.cs (Make Coffee)

public partial class _Default : System.Web.UI.Page { protected void Button1_Click(object sender,EventArgs e) { var order = txtOrder.Text; QueueStorage qStore = QueueStorage.Create(_account); MessageQueue orderQ = qStore.GetQueue("OrderQueue"); orderQ.PutMessage(new Message(order)); }

public class WorkerRole : RoleEntryPoint { public override void Start() { QueueStorage qStore = QueueStorage.Create(_account); MessageQueue orderQ = qStore.GetQueue("OrderQueue"); while (true) { Message msg = orderQ.GetMessage(); if( msg != null) ProcessOrder(msg.ContentAsString()); } protected void ProcessOrder(string order) { //Make some coffee!... }

Use Windows Azure storage for valuable data

Recap

End of Act I

Act II Updates

Code vN Data vN

Code vN Data vN Code vN +1

Code vN Data vN Data vN+1

class Employee : TableStorageEntity { public Employee(string firstName, string lastName) : base(firstName, lastName) //partition key, row key {} public string JobTitle { get; set; } }... var qResult = from emp in svc.CreateQuery (EmployeeDataServiceContext.EmployeeTable) where emp.PartitionKey == "Steve" && emp.RowKey == "Marx select emp; }

class Employee : TableStorageEntity { public Employee(string firstName, string lastName) : base(firstName, lastName) {} public string JobTitle { get; set; } public int Version { get; set; } }... var qResult = from emp in svc.CreateQuery (EmployeeDataServiceContext.EmployeeTable) where emp.PartitionKey == "Steve" && emp.RowKey == "Marx && emp.Version == 1 select emp; }

Stage Deployment Production Deployment

Future: Precise control

Recap

End of Act II

Oh Oh!

Trickiest patch ever

Act III When things go wrong…

ServiceDefinition.csdef ServiceConfiguration.cscfg

... if (RoleManager.GetConfigurationSetting("LogLevel") == "Verbose") RoleManager.WriteToLog("Information", "Some log message");

{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}

!

!

Recap

End of Act III

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