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quick-facts.md

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Azure Quick Facts

Last updated - 2016-10-11

Cloud Services

  • Role startup tasks cannot directly execute a Powershell script – use console application or a batch file that starts the PowerShell script.
  • Setting RoleEnvironmentChangingEventArgs.Cancel to true will take the respective instance offline and bring it back again after the configuration changes have been applied.

SQL

  • SQL Server service tier cannot be changed when Geo-Replication is enabled.
  • Restore window for Basic tier is 7 days.
  • Restore window for Standard tier is 14 days.
  • Restore window for Premium tier is 35 days.

Redis Cache

  • Port should not be specified in the connection string.
  • Sharding/clustering is only available with the Premium plans.

Azure Storage

  • Get Queue Metadata is used to retrieve the approximate size of the queue.
  • Shared Access Signature without Stored Access Policy can only be revoked by changing the account key.
  • Page Blobs are optimized for random I/O operations.
  • Block Blobs are optimized for sequential I/O operations.
  • Zone redundant storage does not support page blobs.

Virtual Machines

  • Sysprep with Generalzie option is used to prepare a VM to be captured as an image.
  • Waagent with Deprovision option is used to prepare a Linux to be captured as an image.
  • Only VMs in the same cloud service can be part of an availability set.

Access Control Lists

  • When an endpoint is first created, all traffic is permitted for that endpoint.
  • When one or more Permit rules are added, traffic is implicitly denied for all IP ranged not included in the Permit rules.
  • When one or more Deny rules are added, traffic is implicitly allowed for all IP ranged now included in the Deny rules.
  • No implicit rules are applied when both Permit and Deny rules are used.

Cloud Storage

  • CloudQueue.FetchAttributes must be used before ApproximateMessageCount property can be read.
  • ApproximateMessageCount provides the approximate number of messages in the queue.

Web Apps

  • When swapping, App Settings can be configured to be swapped or to stick.
  • When swapping, Configuration settings can be configured to be swapped or to stick.
  • When swapping, diagnostic settings are always swapped.
  • When swapping, endpoints are not swapped.
  • When swapping, Webjob content is swapped.
  • When swapping, Webjob schedulers are not swapped.