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Redundant Azure Servers RRS feed

  • Question

  • My business model depends totally on the Azure service being up and running with no problems. Does Microsoft/Azure offer a way to have a second Azure service running in another part of the country, and the ability for us to switch to that service if the primary service fails?   Basically redundant servers with auto switch-over?
    Monday, March 28, 2016 11:46 AM

Answers

  • There are multiple layer of redundancy you may configure/acquire in Azure. For instance:

    • Service - You can configure Availability Set such that you can have multiple instance of VMs/applications responding to incoming requests.
    • Storage - You will have by default 3 local redundant copies (LRS) and can optionally set the storage replication type to Geo-Redundant which gives you 3 local and 3 geo-remote, total 6 copies of your data for redundancy.

    You may find this article a starting point to better understand the availability and scalability of Azure.

    • SQL Database - This is the SQL Database service offered by Azure with fault-tolerance automatically built in.
    • SQL Server - You can configure SQL AlwaysOn availability group

    The redundancy is set within a region which has multiple geo-remote Azure datacenter facilities. If you want to have redundancy between regions for instance, US and Europe, you will need to deploy multiple services and manage the application states yourself, to the best of my knowledge.

    The Azure SLAs are available at http://aka.ms/SLAs for your review.

    There are considerable and cost-effective capabilities in redundancy, availability, auditability, scalability, etc. built in Azure. For those VMs deployed to Azure, you have a rather productive way of backup and restore by employing Azure Recovery Services, which may be a more productive DR option.

    HTH.

    Monday, March 28, 2016 2:21 PM