ASP.NET Core 2 High Performance - Second Edition: Learn the secrets of developing high performance web applications using C# and ASP.NET Core 2 on Windows, Mac, and Linux by James Singleton

Author:James Singleton [Singleton, James]
Language: eng
Format: azw3
Publisher: Packt Publishing
Published: 2017-10-11T04:00:00+00:00

Network diagnostics tools

As we discovered earlier, practically all I/O operations in a virtualized or cloud-hosting infrastructure are now network operations. Disks and databases are rarely local, as this would prevent scaling out horizontally. There are various command-line tools that can help you discover where the API, DB, or any other server you're using is located, and how much latency is present on the connection.

While all of these commands can be run from your workstation, they are most useful when run from a server via a Secure Shell (SSH) or Remote Desktop Protocol (RDP) connection. This way, you can check where your databases, APIs, and storage servers are, in relation to your web servers. Unfortunately, it is common for hosting providers to geographically separate your servers, and put them in different data centers.

For example, if using AWS, then you would want to configure your servers to be in at least the same region, and preferably in the same Availability Zone (AZ), which usually means the same data center. You can replicate (cluster) your DB or file server across AZs (or even across regions) so that your web servers are always talking to a server on their local network. This also adds redundancy, so in addition to increasing performance, it will make your application more resilient to hardware faults or power supply failures.

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