What do you use environment variables for?
A running program can access the values of environment variables for configuration purposes. Shell scripts and batch files use environment variables to communicate data and preferences to child processes. They can also be used to store temporary values for reference later in a shell script.
How do you create an environment variable?
To create or modify environment variables on Windows:
- Right-click the Computer icon and choose Properties, or in Windows Control Panel, choose System.
- Choose Advanced system settings.
- On the Advanced tab, click Environment Variables.
- Click New to create a new environment variable.
Which is an example of an environment variable?
An environment variable is a dynamically named value that can affect a running process’s behavior on your computer. Environment variables are defined system wide. For instance, in your website code, you can use these variables. You can include them in a shell script that you build to insert any information into your database.
What does it mean to have scalability in an application?
Scalability refers to the capacity of a network, system or process to adapt to sudden changes. Applications must be able to handle large increases in simultaneous users, data volume and other workloads.
Is there a one size fits all approach to scalability?
Performance and workload are inextricably linked. There is no one-size-fits-all approach to improving scalability; what works best for a small website will not necessarily work for an MMORPG. Developers must consider the specific needs of their applications and their users.
What does it mean when two environment variables are orthogonal?
‘Orthogonal’ means independent of each other. That implies that no information is duplicated or repeated in two variables, like a server name, and then a connection string that contains the server name. Orthogonal means that environment variables are on different axes of the multidimensional configuration space.