In practical projects, Linux system servers often encounter situations where disk space is insufficient, necessitating disk expansion. There are two scenarios for disk expansion: one is to mount a new disk block to the server and then perform logical partitioning on the newly mounted disk block; the other is to expand existing disk partitions, meaning … Read more
For a server backend (database) operations personnel, adding a volume group directory and online expansion of directories in the Linux operating system is a common operation. In large operations teams, the division of labor is quite detailed, and it may not be necessary for database operations personnel to perform directory expansion operations; this may be … Read more
1.LVM Principles To understand the principles of LVM, we must first grasp four basic concepts of logical volumes. ① PE (Physical Extend) – Physical Extend ② PV (Physical Volume) – Physical Volume ③ VG (Volume Group) – Volume Group ④ LV (Logical Volume) – Logical Volume PV (Physical Volume) A physical volume is the basic … Read more
padluo Reading time required: 4 minutes Quick read only takes 2 minutes Related Concepts Let’s first look at several concepts of LVM (Logical Volume Manager): In LVM (Logical Volume Manager), the relationships between various components can be summarized as follows: Physical Volume (PV): This is an actual disk partition or an entire disk that, after … Read more
The previous article discussed how to create new logical volumes. When the space of a logical volume is insufficient, it needs to be expanded. There are two scenarios: one is that the remaining space is sufficient to support the required expansion size; the other is that there is not enough remaining space to meet the … Read more