13,420
edits
Changes
no edit summary
= Preparing for Purpose of Lab 5= == What is LVM? == Monitoring and ensuring adequate space for a Linux file-system is considered to be a critical task for any system administrator. An application called '''LVM''' is a very useful tool for Linux system administrators to easily manage file systems - even when the computer system is running! '''LVM''' ('''Logical Volume Management''') is used to manage hard disk drives / partitions for Linux and Unix systems. LVM provides more flexibility than just partitioning hard disks. '''Volume Groups''' are areas used to define '''Physical Volumes''' (i.e. hard disks, disk partitions, or other forms of storage devices). '''Logical Volumes''' are then used to relate directories (mount points) to a specific physical volume or for a "range" or "span" of physical volumes. LVM allows more flexibility and growth potential for Linux systems (for example, having Logical volumes span multiple hard disks). CentOS uses LVM by default upon installation. Other Linux distributions may provide the capacity to install LVM, == Any Simple Comparisons for LVM !?! == '''Certainly...''' [[Image:lab1_signoff.png|thumb|right|200px|Students should be prepared with a'''ll required commands (system information) displayed in a terminal (or multiple terminals) prior to calling the instructor for signoff'''.]] Think of adding space like building a cake: * A cake needs to rest on a platter.* In our case the platter is known as the volume group. In this way we can support different volumes groups for different purposes (eg. accounting dept, IT, management, etc) just like different platters would hold different types of cakes for the party!* Just one thing: We can grow our space between other partitions in various volume groups (or platters).