Summary
The LVM is an incredibly useful part of Red Hat Enterprise Linux and provides the capabilities to manage, reallocate, distribute, and assign disk space without having to stop anything in the system. Battle-tested over the years, it is a key component for system administrators, as well as facilitating the incorporation of other extended capabilities in our systems (a flexible way to provide storage to be shared via iSCSI).
Practicing LVM on test machines is extremely important, so we can be sure that the command we will run on a production system will not mean the service being stopped or data being lost.
In this chapter, we have seen the most basic, yet important, tasks that can be done with LVM. We have learned how the different layers of LVM work: physical volumes, volume groups, and logical volumes. Also, we've seen how they interact with each other and how they can be managed. We have practiced creating, extending, and removing logical volumes, volume groups...
