microsoft azure throttling
TRANSCRIPT
Windows Azure Throttling
TalentSoft
Windows Azure Throttling
Julien PLEEResponsable R&D
TalentSoft
[email protected], @julplee
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AZURE THROTTLING
What is throttling?
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• Multi-Tenant• Resource Management
– Resource Governance– Resource Limits– Engine Throttling
• Affects multiples services• Sql Database Network
Topology
Windows Azure Sql Database Case
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Windows Azure Sql DatabaseUne seule base de données logique
Plusieurs réplicas
physiques
Primaire unique P
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rs c
ible
s se
con
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Réplic
a 1
Réplic
a 2
Réplic
a 3
Pare
-feu
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Soft Throttling
• Throttles the activities of a subset of Sql Databases that consume most resources
Hard Throttling
• Final Stage. • No more connections
are allowed until resources are freed up
Engine Throttling
40501: The service is currently busy. Retry the request after 10 seconds. Incident ID: <ID>. Code: <code>.
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• Worker Threads and Sessions limits• Depends on Web/Business/Premium
mode• Error code differs from Engine
Throttling (10928)
Resource Governance
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• Database Size• Transaction Duration• Transaction Lock Count• tempdb• Transaction Log Length• Memory Usage
Resource Limits
démo
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AZURE THROTTLING
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AZURE THROTTLING
How to solve problems?
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Solutions• Entity Framework 6• Enterprise Library 5.0 Integration
Pack for Windows Azure• More money: Sql Database Premium
Azure Throttling & Transient Fault Handling
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Sql Database Premium
Reservation Size
CPU Cores
Worker Threads
Active Sessions
Disk IO (IOPS)
Memory (GB)
P1 1 200 2000 150 8
P2 2 400 4000 300 16
démo
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AZURE THROTTLING
Manage throttling
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Hello Talent Case: TransactionInterceptor.cspublic void Intercept(IInvocation invocation){
...
if (Transaction.Current == null){RetryPolicy policy = new RetryPolicy<SqlDatabaseTransientErrorDetectionStrategy>(...);
var transactionOptions = ...
policy.ExecuteAction(() =>{using (var transactionScope = new TransactionScope(...)){invocation.Proceed();transactionScope.Complete();}});}
}
