Tag: Availability Zones

ArchitectureInfrastructure

Azure Availability Zones

One of the largest gaps that Azure has had when compared to the competition has been the lack of high-availability options.  The most glaring has been the lack of Availability Zones, which have been available in all the main providers such as AWS, Google and even Oracle.

Basically, Availability Zones allow cloud admins to deploy cloud resources to separate datacenters within a region.  This ensures that applications will remain online even if one of the provider’s datacenters go down.

Microsoft has announced a public preview of their Availability Zones to help protect you from datacenter-level failures. These Availability Zones are located inside an Azure region, and each one has its own independent power source, network, and cooling. These zones are separate datacenters which are located “10’s of miles”, from each other.  Microsoft has super-fast network connections between the zones, and have stated that they maintain very strict rules on the network latency between these datacenters. Read More

Infrastructure

Azure Regions and Availability Zones

For a long time, since the beginning of Microsoft Azure, the most granular control you could have for choosing what servers / hardware to host a workload on has been the Azure Region. Each Azure Region is made up of at least 2 or 3 datacenters, but you didn’t have control over which data center was used or how replication was really controlled amongst the datacenters in a particular region. However, now Microsoft Azure has the ability to use Availability Zones to increase the resiliency and high availability of services hosted in a single Azure Region. These Availability Zones now offer a more granular control over hosting workloads in Azure beyond just choosing the less granular Azure Region to host in. Read More