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The forks parameter controls how many hosts are configured by Ansible in parallel. If you are using Ansible for rolling updates and have, say, 2000 systems, but have decided that you want to update only 100 machines at a time, set "serial" in Ansible to 100, and you'll only need 100 forks, too.
Keeping this in consideration, what is Ansible used for?
Ansible is an open source IT Configuration Management, Deployment & Orchestration tool. It aims to provide large productivity gains to a wide variety of automation challenges. This tool is very simple to use yet powerful enough to automate complex multi-tier IT application environments.
- Method1: Specify Localhost in your hosts directive of your playbook.
- Method2: Add an entry in your Inventory.
- Method3: Specify in the Ansible Command line. Why –limit is important here in method3.
Also question is, what is forks in Ansible CFG?
forks. This is the default number of parallel processes to spawn when communicating with remote hosts. Since Ansible 1.3, the fork number is automatically limited to the number of possible hosts at runtime, so this is really a limit of how much network and CPU load you think you can handle.
Pipelining Pipelining is the modern Ansible method of speeding up your ssh connections across the network to the managed hosts. It replaces the former Accelerated Mode. It reduces the number of ssh operations required to execute a module by executing many Ansible modules without an actual file transfer.