| Measurement |
Description |
Measurement
Unit |
Interpretation |
| State |
The current state of this volume group |
Percent |
If this measure reports the value 100, it indicates that this volume group is active/complete. Such a state implies that all physical volumes within the group are currently active. On the other hand, if this measure reports the value 0, it indicates that this volume group is active/partial. This state implies that some physical volumes in the group are currently inactive. |
| Maxlvs |
The maximum number of logical volumes allowed in this volume group |
Number |
A logical volume presents the user with a contiguous address space of pages (0 .. N-1 pages in a volume with N pages) on secondary storage. Page I/O, mounting, and dismounting volumes is performed by applications on logical volumes. A logical volume is mapped to one or more physical volumes. All user I/O occurs through a logical volume. |
| Current_lvs |
The number of logical volumes currently in this volume group |
Number |
The detailed diagnosis of this measure lists the logical volumes within the group, the current state of the volume, and the number of logical partitions, physical partitions, and physical volumes attached to this volume group. |
| Open_lvs |
The number of logical volumes within this volume group that are currently open |
Number |
|
| Total_pvs |
The total number of physical volumes within this volume group |
Number |
To know which physical volumes are within this group, use the detailed diagnosis of this measure. The detailed diagnosis will list the physical volumes in the group, the state of each volume, the number of physical partitions within every volume, and the number of free partitions per volume. |
| Statle_pvs |
The total number of stale physical volumes within this volume group |
Number |
A physical volume is stale if its contents reflect a version of the logical volume that is earlier than the current version. Typically, if a user mounts a logical volume while one of two physical volumes backing it is unavailable, but immediately dismounts it, the unavailable physical volume is declared as stale. |
| Active_pvs |
The number of physical volumes that are currently active in this volume group |
Number |
|
| MaxPPS_VG |
The maximum number of physical partitions allowed for this volume group |
Number |
|
| MaxPPs_pv |
The maximum number of physical partitions per physical volume allowed for this volume group |
Number |
|
| ppSize |
Indicates the size of each physical partition supported by each physical volume in this volume group |
MB |
When you add a physical volume to a volume group, the physical volume is partitioned into contiguous, equal-sized units of space called physical partitions. A physical partition is the smallest unit of storage space allocation and is a contiguous space on a physical volume. Physical volumes inherit the volume group’s physical partitions size.
|
| Total_pps |
The total number of physical partitions within thid volume group |
Number |
|
| Free_pps |
The number of physical partitions in this volume group that are not allocated to logical volumes |
Number |
|
| Used_pps |
The number of physical partitions in this volume group that are currently allocated to logical volumes |
Number |
|
| Stale_pps |
The number of stale physical partitions currently available in the logical volumes supported by this volume group |
Number |
A STALE physical partition is a physical partition that contains data you cannot use. Physical partitions marked as STALE must be updated to contain the same information as valid physical partitions. This process, called resynchronization, can be done at vary-on time, or can be started anytime the system is running. Until the STALE partitions have been rewritten with valid data, they are not used to satisfy read requests, nor are they written to on write requests. |
| Max_pvs |
The maximum number of physical volumes allowed in this volume group |
Number |
|