vg smartglass

Linux disk Virtualization 1. LVM (Logical Volume Manager): The logic scroll bar administrator. LVM can combine the partions (or disks) of several entities into a large independent disk (VG) through software ), then, the large disk is divided into separate slots (LV), which can be mounted and used. 2. PV (Physical Volume): the entity scroll bar. Our actual partition needs to be adjusted by the system ID called 8e (LVM identifier ), then, the pvcreate c

0 8 37 0 active sync/dev/sdc5 1 8 38 1 active sync/dev/sdc6 2 8 39 2 active sync/dev/sdc7 5 8 40 3 active sync/dev /sdc8 4 8 41-spare/dev/sdc9 Step 4: convert RAID to physical volume (I .e. PV) [root @ compute-0 mnt] # pvscan # First scan for existing physical volumes No matching physical volumes found [root @ compute-0 mnt] # pvcreate/dev/md1 # create a physical volume Writing Physical volume data to disk "/dev/md1" physical volume "/dev/md1" successfully Cres Ated [root @ compute-0 mnt] # pvs

In the case of hard disk shortage, the usual practice is to use symbolic links or tools to resize partitions (parted), but these practices are only a temporary change of the difficult situation, and after each change in the size of the partition to restart the system, as a system administrator, restart is not allowed, So LVM is a good choice to solve this situation.Content: Basic concepts of LVM (logical Volume management program): PV (physical volume): Physical vol

1. what is LVMLVM (LogicalVolumeManager) logical volume manager. LVM combines several physical partitions or disks into a seemingly independent large disk (VG) through software, and then divides this large disk into usable partitions (LV: logical Volume). These partitions (LV) can be expanded or reduced to elastically adjust the capacity of the file system. II. PV, PE, VG, L 1. what is LVM? LVM: (Logical Vo

1. LVM: a mechanism for managing disk partitions in Linux. LVM is a logical layer built on hard disks and partitions to improve disk partition management flexibility. Introduction to DM logical devices 1.1 volume Group Voume Group): A Group composed of multiple physical volumes. It is a combination and cannot be used directly. To use the combined space, you must create a logical volume; the VG size depends on the physical volume, and multiple logical

) p Model: VMware, VMware Virtual S (scsi)Disk /dev/sdb: 2147MBSector size (logical/physical): 512B/512BPartition Table: gptDisk Flags: Number Start End Size File system Name Flags 1 4194kB 2048MB 2044MB primary lvm ######################################## #######################################Create PV [[emailprotected] zhongq]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created[

(parted) p Model: VMware, VMware Virtual S (scsi)Disk /dev/sdb: 2147MBSector size (logical/physical): 512B/512BPartition Table: gptDisk Flags: Number Start End Size File system Name Flags 1 4194kB 2048MB 2044MB primary lvm ######################################## #######################################Create PV [root@localhost zhongq]# pvcreate /de

-write. If you just copy the data, the read-only snapshot looks good, but there are several advantages to reading and writing the snapshot. First, there is no need to process the log file system-you can simply implement log recovery on the snapshot. A read-only snapshot must ensure that the file system synchronizes with the device before it starts the snapshot, and therefore requires a log replay.Seven. Common terminology for LVM1 . Physical storage media (the physical media)This refers to the

20970496-up LinuxCommand (M for help): WThe partition table has been altered!Calling IOCTL () to re-read partition table.Syncing disks.Create PV[Email protected] ~]# PvscanPv/dev/sda2 VG centos_zzsrv1 lvm2 [39.51 gib/0 Free]Total:1 [39.51 Gib]/in use:1 [39.51 GIB]/in no vg:0 [0][Email protected] ~]# PVCREATE/DEV/SDB1Physical volume "/DEV/SDB1" successfully created[Email protected] ~]# PvscanPv/dev/sda2

* = 8225280 bytessector size (logical/physical): 512 bytes/512 bytesi/o Size (miNimum/optimal): bytes/512 bytesdisk identifier:0x6751fd38 device Boot STARTN Bsp End blocks Id system/dev/sde1 1 1044 8385898+ 8e Linux Lvmdi sk/dev/mapper/vg_rac01-logvol01:12.7 GB, 12670992384 bytes255 heads, sectors/track, 1540 cylindersunits = cylinders O F 16065 * = 8225280 bytessector size (logical/physical): bytes/512 bytesi/o size (minimum/optimal): Bytes/ Bytesdisk identifier:0x00000000disk

= 4096 (log = 2) 5248992 inodes, 10486428 blocks524321 blocks (5.00%) reserved for the super userFirst data block = 0 Maximum filesystem blocks = 4294967296321 block groups32768 blocks per group, 32768 fragments per group16352 inodes per groupSuperblock backups stored on blocks: 32768,983 04, 16 3840,229 376, 294912,819 200, 884736,160 5632, 2654208,409 6000, 7962624 Writing inode tables: done Creating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: doneTh

No matching physical volumes found [root @ compute-0 mnt] # pvcreate/dev/md1 # create a physical volume Writing physic Al volume data to disk "/dev/md1" Physical volume "/dev/md1" successfully created [root @ compute-0 mnt] # pvscan # view PV/dev/md1 lvm2 [469.50 MiB] Total: 1 [469.50 MiB]/in use: 0 [0]/in no VG: 1 [469.50 MiB] [root @ compute-0 mnt] # Step 5: create a logical volume group (that is, VG) [r

Note: The operation of any disk may damage the data inside, please back up the data in advance, remember! Remember! Remember!0x00: Preface.The total space of the VG volume group is limited by the physical disk size, this tutorial has 3 physical disks are 100M, 200M, 300M, then the VG volume group total space is 600M, and the VG under all LV Cumulative total space

System Environment: 　 　1) HP-UX 11.00 　 　2) model: 9000/715/d This note contains the following content: Creating LVM, expanding the file system, narrowing down the file system, moving LVM, and deleting VG. 1. Establish LVMSuppose we have twoHard Disk: C0t3d0 and c0t4d0. To create vg02, which contains the two hard disks, you can perform the following operations:1. Generate PV Information# Pvcreate-F/dev/rdsk/c0t3d0# Pvcreate-F/dev/rdsk/c0t4d0Note: If

1. Glossary: PV (PhysicalVolume): Physical volume, which is at the bottom of LVM and can be a physical hard disk or partition. VG (VolumeGroup): Volume Group, built on PV, can contain one or more PVS. LV (LogicalVolume): logical volume, built on top of VG, is equivalent to the concept of the original partition. However, the size can be dynamically changed. 1. glossary: PV (Physical Volume): Physical Volume,

LVM disk management 1. LVM introduction... 1. basic terms of LVM... 2. install LVM... 3. create and manage LVM... 42. create PV .. 63. create VG .. 74. create LV .. 95. LV formatting and mounting... 10 I. LVM introduction LVM is short for LogicalVolumeManager (logical volume management), which is composed of HeinzMauelsh LVM disk management 1. LVM introduction... 1 II. basic terms of LVM... 2 3. install LVM... 3 4. create and manage LVM... 4 2. create

heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065*512 = 8225280 bytesSector size (logical/physical ): 512 bytes/512 bytesI/O size (minimum/optimal): 512 bytes/512 bytesDisk identifier: 0x000d0b56 Device Boot Start End Blocks Id System/dev/sda1 * 1 64 512000 83 LinuxPartition 1 does not end on cylinder boundary. /dev/sda2 64 1045 8e Linux LVM Disk/dev/sdb: 7875584 MB, 8589 bytes255 heads, 63 sectors/track, 8589934592 cylindersUnits = cylinders of 1044*16065 = 512 bytesSector size

The advantage relative to the ordinary disk is that the logical volume can be dynamically stretched online (without first unmount operation), as long as there is enough space in the VG to1: First check if the VG has enough space[Email protected] mapper]# Vgdisplay2: Online Stretching of logical volumes[Email protected] mapper]# lvextend-l +2g/dev/vg_gechong/lv_swap3: View the size of the logical volume[Emai

LVM (Logical Volume Manager) Logical volume management is a common operation in Linux Disk Management, this article mainly describes the basic principles of LVM and the operation of the expansion and reduction of LVM.LVM is essentially a software way to combine multiple physical partitions or disks into a variable-size volume group of VG, and then make a variable-size logical volume LV by using the basic unit PE in the VG.The advantages of LVM: By adj

When we use the disk with the traditional partitioning method, when the partition size is not enough, it is usually only possible to add a larger disk and recreate the partition to expand the space. However, this can only be the original disk offline, replace the new disk, the original data is written in the actual production process is not allowed. In this case, you need to use logical volume LVM to manage this type of disk partition.A logical volume is a re-"split" of hard disk space into a bl