What is AIX LTG size?
LTG is the maximum transfer size of a logical volume (volume group?). At 5.3 and 6.1 AIX dynamically sets LTG size (calculated at each volume group activation). (Many LVM commands place a lock into the ODM to prevent other commands working on the same time.)
How do you make VG bigger in AIX?
Creating a Volume Group
- Create a Volume Group.
- Create a Logical Volume within the VG containing a JFS2 filesystem that will be automatically mounted during boot.
- Add a disk to the VG and mirror the data across 2 disks.
- Display LP>PP mappig and LVCB.
What is physical volume in AIX?
The disk itself is called a physical volume (PV). When multiple PVs are available they can be collected into volume groups (VGs). In the figure above, we see three disks, hdisk1, hdisk2, and hdisk3. Each disk has been divided into PPs.
How do you know if a VG is scalable in AIX?
To determine the VG type, one can use the ‘lsvg’ command to compare the volume group properties with the default volume group properties in the following table. Using the ‘lsvg [vgname]’ command, we see the defaults for a small VG from the preceding table in bold.
What is LP in AIX?
Description. The lp command arranges for the files specified by the Files parameter and their associated information (called a request) to be printed by a line printer. If you do not specify a value for the Files parameter, the lp command accepts standard input.
What is scalable VG in AIX?
AIX 5L Version 5.3 has introduced a new VG type called scalable volume group (scalable VG). A scalable VG allows a maximum of 1024 PVs and 4096 LVs. The maximum number of PPs applies to the entire VG and is no longer defined on a per disk basis.
What is quorum disk in AIX?
A quorum is a vote of the number of Volume Group Descriptor Areas and Volume Group Status Areas (VGDA/VGSA) that are active. A quorum ensures data integrity of the VGDA/VGSA areas in the event of a disk failure. Each physical disk in a volume group has at least one VGDA/VGSA.
How do I see disk size in AIX?
#bootinfo -s hdiskX–> gives the size of the given disk. If you need the size of all the disks, check for the disks which are all available. It gives the sizes of all the disks.
How do you convert big VG to scalable VG in AIX?
In order to change the VG type we need to ensure that there are atleast 1 free PP per PV for large and 2 free PP’s per PV for scalable (Recommended to be 2 free PP’s per PV for either) because during changing the VG type the VGDA on the disk expands which requires an additional PP atleast.
What are different types of volume groups in AIX?
Determining volume group types in AIX
| VG type | Maximum PVs | Maximum PPs per VG |
|---|---|---|
| Normal VG | 32 | 32,512 (1016 * 32) |
| Big VG | 128 | 130,048 (1016 * 128) |
| Scalable VG | 1024 | 2,097,152 |
What is T factor in AIX?
Using the “t-factor” The downside of using the t-factor is it divides the maximum number of PVs that can be put in to a volume group. For example, a t-factor of 2 applied to a regular volume group would allow the admin to add a disk that creates 2032 PPs (2 x 1016) on each PV.
How do you increase the size of a logical volume in AIX?
run smit lvm and click on logical volumes. then click on set charasteristics of a logical volume and under that u have an option to increase the size of a logical voulme.
How do I close a logical volume in AIX?
You have to unmount the filesystem for the LV. Use “smitty lv” and select the logical volume you want to remove. Or use the command, “rmlv”..
How do I find my LUN ID in AIX?
If u have EMC PowerPath installed, powermt display dev=all will map all the hdiskXX devs (which are in fact paths to the LUNS) with the hdiskpower devices and u can also get the wwn from there. You can use cat/grep/sed/awk to get the luns u need and use sort/uniq to get rid of any duplicates.
What is Hdisk in AIX?
hdisk. Like other disk storage units in AIX, the disk arrays are assigned names using the hdisk form. The names are deleted when you delete the disk array. An hdisk is a disk that is formatted to 512 bytes per sector. These disks must be formatted to 528 bytes per sector before they can be used in disk arrays.
What is LVM in AIX?
LVM is a generalized approach to managing storage that is not specific to any operating system. All UNIX-like operating systems typically offer an LVM option; in AIX an LVM-based approach is the only way to manage storage. So understanding how AIX implements LVM is necessary for the AIX administrator.
How do I increase max PPs per VG?
The MAX PPs per VG value can be increased dynamically against an active (imported/varied on) Volume Group. The new value must be greater than the existing value. Once increased, the value cannot be decreased without removing and recreating the VG. Enter the VG name and change the following entry to the desired value…
How do I increase my logical volume size?
Extend the Logical Volume Extend the LV with the lvextend command. The lvextend command allows you to extend the size of the Logical Volume from the Volume Group. Figure 8: Use the lvextend command to extend the LV. [root@redhat-sysadmin ~]# lvextend -l +100%FREE /dev/centos/root.
What is logical volume in AIX?
In AIX 7.2 with the 7200-01 Technology Level, or later, the Logical Volume Manager (LVM) supports space reclamation for physical volumes that are capable of reclaiming space. Logical volume storage concepts.