In ASP.Net 4.0 which is the best way of storing the cache object when we go with webfarm ,
1) Windows Server AppFabric
2) Separate State Machine / SQL Server
3) Thrid party caching mechanisms / Others ?.
I would say sticking with MS technologies would be the best since you're already using ASP.NET. AppFabric was designed just for this case. Otherwise Memcached is a good alternative.