Imagine a request comes to Nginx, then we process the request in PHP .... suddenly while execution of PHP is running, we don't have more resources in the server , so we need to process that PHP code on other…
I have a stateless application(asp.net mvc 4.7.2),Which runs on multiple instance.(azure). My application uses form authentication (cookie based). When I login in some cases I get response back from diffrent instance and system shows as not logged in, on refresh…
I am reading about distributed systems and getting confused with what is really means? I understand on high level, it means that set of different machines that work together to achieve a single goal. But this definition seems too broad…
Let's say I want to use a built-in solution such as Redis or Memcached to cache database rows (as an example), to avoid recurrent costly trips to the database. For the sake of the argument, let's assume I have a…
This question sounds very much like: this one, but I believe it is not. Whilst that question is very specific, I believe it doesn't provide enough to cover the doubts I have. I am trying to set up a Redis…
Suppose we have two servers serving requests through a load balancer. Is it necessary to have web server in both of our servers to process the requests. Can load balancer itself act as a web server. Suppose we are using…
I know memcache use consistency hashing to do shading. But, do memcache do replication as disk storage? I assume it will not. Since, losing one of the caching server just means the cache miss of that shard. It's not a…