How many tcp connections should i have

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If there is a limit on the number of ports one machine can have and a socket can only bind to an unused port number, how do servers experiencing extremely high amounts more than the max port number of requests handle this? Is it just done by making the system distributed, i.

You misunderstand port numbers: a server listens only on one port and can have large numbers of open sockets from clients connecting to that one port. On the TCP level the tuple source ip, source port, destination ip, destination port must be unique for each simultaneous connection. That means a single client cannot open more than simultaneous connections to a single server. But a server can theoretically serve simultaneous connections per client.

So in practice the server is only limited by how much CPU power, memory etc. When offering network services, 1. IP So although practically a client will not use a port already in use for a connection to open a connection to a different destination IP address, port number depletion is going to be the least of your problems for nearly any application - be it on the server or client side.

The problem is a very real one with NAT gateways routers serving clients with a high number of open outbound connections e. In this case the NAT gateway is unable to create any additional associations, thus effectively cutting clients off the internet. There are multiple ways to share load across multiple servers; DNS round robin is one; there are others.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Operating systems provide different facilities for manipulating their TCP connections. Table shows some of the primary interfaces provided by the sockets API. The sockets API was first developed for the Unix operating system, but variants are now available for almost every operating system and language.

In Figure , we showed how a web browser could download the power-tools. The pseudocode in Figure sketches how we might use the sockets API to highlight the steps the client and server could perform to implement this HTTP transaction. We begin with the web server waiting for a connection Figure , S4.

Establishing a connection can take a while, depending on how far away the server is, the load on the server, and the congestion of the Internet. Once the server gets the entire request message, it processes the request, performs the requested action Figure , S7 , and writes the data back to the client. The client reads it Figure , C6 and processes the response data Figure , C7. In this case, the client and server are notified of the communication breakdown.

Richard Stevens Addison Wesley. If yes, you may accept useful reply as answer, if not, welcome to feedback. Best Regards, Sunny. There are two actions that can prevent this: 1. Increasing the number of available ephemeral ports. By default, Windows only allocates ephemeral ports in the range through Hope this will help you. Comment Show 0.