What feature does Azure Availability Sets provide?
Answers
Availability set is a great feature Azure provides for Business continuity. So when two or more servers are in a single availability set, even if one or more of servers becomes unavailable due to any reason, rest of servers in an Availability set will provide the service.
For example: Consider I have hosted my site in two web servers say Web1 and Web2 which are in availability set. If Web1 becomes unavailable due to any reason for some time, Web2 will provide the service.
Also, Microsoft offers 99.99% uptime for the servers in Availability set.
So, what actually happens at the backend…
In MS datacentres, our servers are hosted on Physical racks. Due to any reason (Power loss, maintenance, heavy load) that particular rack becomes unavailable. Right at that point MS Security centre automatically move those servers to any available healthy nodes in a same cluster. This might takes 15 minutes max. During this time, if I don't have my server in Availability set my site will be down for 15 minutes. So to have continuous business, MS recommends to have servers in Availability set.
Hope this clears.
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It provides the feature of continuity.
- In this application, the availability set offers high accessibility and business continuity.
- If there are numerous resources in an accessible set, the others will step in to provide the service if one fails. It is aware of how the user's application is set up to offer availability and redundancy.
- Let's say server A and server B are part of the same availability set. When the user launches a website utilising these two servers, Server B will immediately function as a backup in the event that Server A fails.
- It provides high access and application resilience by effectively dispersing over accessible zones or fault domains. This allows for automatic application scaling as resource demand changes. expansive projects
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