I am currently working on a ASP.NET MVC application.Currently it is using AppFabric for storing session and cache data.But Microsoft has stopped support for AppFabric.Microsoft is using Redis for cache management and is supported by Azure. What is the difference between AppFabric and Redis in terms of speed,size of data and performance?How Redis is different than AppFabric?
According to the following post, "Mainstream Support will be provided until 4/11/2017 and Extended Support until 4/12/2022."
This means you are not without support yet. However, Microsoft does recommend that all application using AppFabric should migrate to Redis Cache. See this entry in MSDN for Cache Recommendations.
https://msdn.microsoft.com/en-us/library/azure/dn766201.aspx
How is Redis better/different than AppFabric...
First, AppFabric was actually contained a number of technologies including, Service Bus, Access Control Service, and Caching
see also: Azure AppFabric vs. Server AppFabric - today
Second, from a caching perspective, AppFabric was more closely aligned with .Net. Redis as an Open Source NoSQL database store is usable by a broad set of technologies including Python, Ruby, Java, PHP, Node, C, C#.
Third, since its keys can store data structures like strings, hashes, lists, sets, sorted sets, bitmaps, and hyperloglogs, it is generally more flexible than other caching solutions.
There is a migration guide here, if you want to see what might be involved with moving to Redis Cache.
https://msdn.microsoft.com/en-us/library/azure/dn690524.aspx