cgroups

[Trevor]

cgroups (Control Groups)
- a linux kernel feature
- allows resouces like CPU time, memory, and network bandwidth, to be allocated
     to groups of processes
- help manage resource utilization
- prevents any single process, or user, from monopolizing system resources 
    (i.e. CPU time, memory, network bandwidth, etc.)

There are two kinds of cgroups:
1) transient
2) persistent

A transient cgroup refers to a temporary control group that is automatically 
deleted when a process or seriice, associated with the cgroup, finishes executing.
What this simply means is that the cgroup does NOT persist after the process
or service is stopped.

A persisitent cgroup, on the other hand, remains configured even after a system
reboot.  This type of cgroup can be created in a couple of ways, but is typically
done so using the systemd-run command - to manage resource (CPU time,
memory, network bandwidth, etc.) usage of a temporary process or service.

Some key points about transient cgroups:

• Creation:
  Usually created dynamically using the systemd tools like systemd-run when 
  starting a process or service.

• Lifetime:
  Exists only for the duration of the associated process or service, and is automatically
  removed upom termination of the process or service.
• Use cases:
  Useful for managing resource usage of temporary tasks or applications that only need resource control during their active runtime.

Contrasting Transient cgroups with persistent cgroups:

• Persistent cgroups: 
  These cgroups are configured in systemd unit files and remain after a
  system reboot, allowing for long-term resource management of services.

cgroups are a powerful resource management tool in the Linux ecosystem!!!