
Monitoring Disk Resources
Disk Monitor Reference
| Logical Volume Summary | ||
| The logical volume summary tells you how accessible the data is in all logical | ||
| volumes in an active volume group. Sometimes the physical connection may be | ||
| working, but the application cannot read or write data on the disk. The disk monitor | ||
| determines I/O activity by querying LVM, and marks a logical volume as DOWN if | ||
| a portion of its data is unavailable. | ||
|
|
|
|
NOTE | The disk monitor cannot determine data accessibility to logical volumes in an | ||
| inactive volume group. | ||
| The values in Table | ||
| |||
| compare in logical operations. For example, you may create a request that alerts you | ||
| when the condition is greater than or equal to INACTIVE_DOWN. | ||
Table | Interpreting Logical Volume Summary | ||
|
|
| |
Resource Name | /vg/vgName/lv_summary | ||
|
|
|
|
Condition |
| Value | Interpretation |
|
|
|
|
UP |
| 1 | All logical volumes are accessible, all data is accessible. |
|
|
|
|
INACTIVE |
| 2 | The volume group is inactive. This could be because: |
|
|
| • The volume group is active in exclusive mode on another node |
|
|
| in an MC/ServiceGuard cluster. (This is not valid for clusters |
|
|
| running MC/LockManager, because it can support a volume |
|
|
| group being active on more than one node.) Note that |
|
|
| MC/ServiceGuard does allow a volume group to be active in |
|
|
| |
|
|
| • The volume group was made inactive usingvgchange |
|
|
| for maintenance or other reasons. |
|
|
| • There was not a quorum of active physical volumes at system |
|
|
| boot, i.e. not enough disks in the volume group were working. |
|
|
|
|
INACTIVE_DOWN |
| 3 | The last time the inactive volume was activated, it was DOWN; at |
|
|
| least one logical volume in the volume was inaccessible |
|
|
|
|
DOWN |
| 4 | At least one logical volume in the volume group reports a status of |
|
|
| either INACTIVE or DOWN. Note that an inactive logical volume |
|
|
| in an active volume group is rare, but possible. See “Logical |
|
|
| Volume Status” on page 38. |
|
|
|
|
Chapter 2 | 37 |