vg smartglass

LVM. The most common hard-to-decide problem that Linux users encounter when installing the Linux operating system is how to correctly evaluate the size of each partition to allocate suitable hard disk space. When a partition space is exhausted, the solution is usually to use a symbolic link or a tool to adjust the partition size (such as PatitionMagic), but this is only a temporary solution, the problem is not fundamentally solved. With the appearance of the logical disk volume management funct

LVM The full name of LVM is logical volume manager. The reason for becoming a volume is that it can stretch or shorten the file system like a volume. LVM combines several physical partitions or disks into a large independent disk (VG) through software, and then partitions the disk, it is divided into usable partitions (LV) and can be mounted and used. PV physical volume We need to adjust the system identifier (System ID) to 8E (LVM identifier) for ou

lvm:logical Volume Manager, logical Volume Manager. It is a mechanism for disk partition management in the LIUNX environment. Shields the underlying disk layout and facilitates dynamic disk capacity adjustment. It can also be created on raid, adding redundancy. However,/boot is used to store the bootstrap file and cannot be applied LVM. Its working mechanism is to combine the underlying physical volumes (PV, which can be multiple disks or multiple physical partitions) into a single volume group

Installing the HA SoftwareFirst, install the softwareThe most stable version is 5.4.0, priority installation stable version 5.4Install depends on package base.data, cluster man pack installation failure reason is missing Base.data packageInstall all cluster. Packages that begin with, you can not install the Cluster.man packageSecond, hit the HA patchExecute the instructions before patching: Inutoc generate the. toc file, and then Smitty Update_all upgrade Cluster to 5.4.1.0 versionConsiderations

LVM: Logical volumn manager logical volume Management What is used? LVM converts a storage device into a PV, organizes one or more PVS into one or more volume groups, and then creates a LV on the volume group. After creating the LV and formatting it, you can mount and use it. The benefits of using LVM to manage hard disks are that you can adjust the partition size without shutting down and expand the disk easily. A single partition can be located on multiple hard disks. The size of each partit

logical volume of the way. The most important feature of LVM is the ability to dynamically manage disks. Because the size of the logical volume can be dynamically adjusted, and no existing data is lost. If we add a new hard disk, it will not change the existing upper-level logical volumes. As a dynamic disk management mechanism, logical volume technology greatly improves the flexibility of disk Management. Basic Logical Volume Management concepts: PV (physical Volume)-Physical volumeThe physica

partition (1-4) p Partition number (1-4): 1 First cylinder (1-63, default 1 ): using default value 1 Last cylinder or + size or + sizeM or + sizeK (1-63, default 63): Using default value 63 Command (m for help ): w The partition table has been altered! Calling ioctl () to re-read partition table. Syncing disks. [root @ o564gtser1 ~] # Pvcreate/dev/sdd1 Physical volume "/dev/sdd1" successfully created [root @ o564gtser1 ~] # Pvs pv vg Fmt Attr PSize P

LVM: logicalvolumemanager (logical volume management). LVM shields the underlying disk layout and facilitates dynamic adjustment of disk capacity. 1. steps for creating a logical volume: 1) use the fdisk tool to convert the disk to a linux partition 2) use the pvcreate command to convert the linux partition to a physical volume (PV); 3) use the vgcreate command to process the created physical volume LVM: logical volumemanager (logical volume management); LVM shields the underlying disk layout an

Mount another hard disk in centos Try to mount another hard disk in centos. One of the partitions is in LVM2 format and cannot be mounted directly. The method is recorded as follows for future use. 1. First, use vgscan to scan lvm. The result is as follows: [Root @ localhost ~] # VgscanReading all physical volumes. This may take a while...WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes preced

size of the original file system, we only need to adjust the/home size to use a larger partition, and then we can return to the business. Of course, lvm can also take snapshots of itself, which enables us to back up some unmovable targets. Second, basic components of LVM Physical Media ----- The Physical Media, which indicates that it is only a hard disk or a partition, such as/dev/hda,/dev/sda,/dev/sda4, and so on. Physical Volume ----- Physical Volume (PV) a pv is only a Physical medium wit

without losing existing data. If we add a new hard disk, it will not change the existing upper-layer logical volume. As a dynamic disk management mechanism, logical volume technology greatly improves the flexibility of disk management. Basic logical volume management concepts: PV (Physical Volume)-Physical VolumeThe physical volume is at the bottom of the logical volume management. It can be an actual physical hard disk.Partition, or the wholeThe physical hard disk can also beRaid device.

, and its physical volume (PV) are used ). One or more physical volumes can be used to create a volume Group (VG ). Then, you can create logical volumes (LV) based on the volume group ). As long as there is space available in the volume group, you can create logical volumes as you like. The file system is created on a logical volume and can be mounted and accessed in the operating system. LVM test description This article describes how to create and m