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C.3. Selection Criteria Fields
This section describes the logical and physical volume selection criteria fields you can specify.
Table C.5, “Logical Volume Fields” describes the logical volume fields and their field types.
| Logical Volume Field | Description | Field Type |
|---|---|---|
lv_uuid | Unique identifier | string |
lv_name | Name (logical volumes created for internal use are enclosed in brackets) | string |
lv_full_name | Full name of logical volume including its volume group, namely VG/LV | string |
lv_path | Full pathname for logical volume (blank for internal logical volumes) | string |
lv_dm_path | Internal device mapper pathname for logical volume (in /dev/mapper directory) | string |
lv_parent | For logical volumes that are components of another logical volume, the parent logical volume | string |
lv_layout | logical volume layout | string list |
lv_role | logical volume role | string list |
lv_initial_image_sync | Set if mirror/RAID images underwent initial resynchronization | number |
lv_image_synced | Set if mirror/RAID image is synchronized | number |
lv_merging | Set if snapshot logical volume is being merged to origin | number |
lv_converting | Set if logical volume is being converted | number |
lv_allocation_policy | logical volume allocation policy | string |
lv_allocation_locked | Set if logical volume is locked against allocation changes | number |
lv_fixed_minor | Set if logical volume has fixed minor number assigned | number |
lv_merge_failed | Set if snapshot merge failed | number |
lv_snapshot_invalid | Set if snapshot logical volume is invalid | number |
lv_skip_activation | Set if logical volume is skipped on activation | number |
lv_when_full | For thin pools, behavior when full | string |
lv_active | Active state of the logical volume | string |
lv_active_locally | Set if the logical volume is active locally | number |
lv_active_remotely | Set if the logical volume is active remotely | number |
lv_active_exclusively | Set if the logical volume is active exclusively | number |
lv_major | Persistent major number or -1 if not persistent | number |
lv_minor | Persistent minor number or -1 if not persistent | number |
lv_read_ahead | Read ahead setting in current units | size |
lv_size | Size of logical volume in current units | size |
lv_metadata_size | For thin and cache pools, the size of the logical volume that holds the metadata | size |
seg_count | Number of segments in logical volume | number |
origin | For snapshots, the origin device of this logical volume | string |
origin_size | For snapshots, the size of the origin device of this logical volume | size |
data_percent | For snapshot and thin pools and volumes, the percentage full if logical volume is active | percent |
snap_percent | For snapshots, the percentage full if logical volume is active | percent |
metadata_percent | For thin pools, the percentage of metadata full if logical volume is active | percent |
copy_percent | For RAID, mirrors and pvmove, current percentage in-sync | percent |
sync_percent | For RAID, mirrors and pvmove, current percentage in-sync | percent |
raid_mismatch_count | For RAID, number of mismatches found or repaired | number |
raid_sync_action | For RAID, the current synchronization action being performed | string |
raid_write_behind | For RAID1, the number of outstanding writes allowed to writemostly devices | number |
raid_min_recovery_rate | For RAID1, the minimum recovery I/O load in kiB/sec/disk | number |
raid_max_recovery_rate | For RAID1, the maximum recovery I/O load in kiB/sec/disk | number |
move_pv | For pvmove, source physical volume of temporary logical volume created by pvmove | string |
convert_lv | For lvconvert, name of temporary logical volume created by lvconvert | string |
mirror_log | For mirrors, the logical volume holding the synchronization log | string |
data_lv | For thin and cache pools, the logical volume holding the associated data | string |
metadata_lv | For thin and cache pools, the logical volume holding the associated metadata | string |
pool_lv | For thin volumes, the thin pool logical volume for this volume | string |
lv_tags | Tags, if any | string list |
lv_profile | Configuration profile attached to this logical volume | string |
lv_time | Creation time of the logical volume, if known | string |
lv_host | Creation host of the logical volume, if known | string |
lv_modules | Kernel device-mapper modules required for this logical volume | string list |
Table C.6, “Logical Volume Device Combined Info and Status Fields” describes the logical volume device fields that combine both logical device info and logical device status.
| Logical Volume Field | Description | Field Type |
|---|---|---|
lv_attr | Selects according to both logical volume device info as well as logical volume status. | string |
Table C.7, “Logical Volume Device Info Fields” describes the logical volume device info fields and their field types.
| Logical Volume Field | Description | Field Type |
|---|---|---|
lv_kernel_major | Currently assigned major number or -1 if logical volume is not active | number |
lv_kernel_minor | Currently assigned minor number or -1 if logical volume is not active | number |
lv_kernel_read_ahead | Currently-in-use read ahead setting in current units | size |
lv_permissions | logical volume permissions | string |
lv_suspended | Set if logical volume is suspended | number |
lv_live_table | Set if logical volume has live table present | number |
lv_inactive_table | Set if logical volume has inactive table present | number |
lv_device_open | Set if logical volume device is open | number |
Table C.8, “Logical Volume Device Status Fields” describes the logical volume device status fields and their field types.
| Logical Volume Field | Description | Field Type |
|---|---|---|
cache_total_blocks | Total cache blocks | number |
cache_used_blocks | Used cache blocks | number |
cache_dirty_blocks | Dirty cache blocks | number |
cache_read_hits | Cache read hits | number |
cache_read_misses | Cache read misses | number |
cache_write_hits | Cache write hits | number |
cache_write_misses | Cache write misses | number |
lv_health_status | logical volume health status | string |
Table C.9, “Physical Volume Label Fields” describes the physical volume label fields and their field types.
| Physical Volume Field | Description | Field Type |
|---|---|---|
pv_fmt | Type of metadata | string |
pv_uuid | Unique identifier | string |
dev_size | Size of underlying device in current units | size |
pv_name | Name | string |
pv_mda_free | Free metadata area space on this device in current units | size |
pv_mda_size | Size of smallest metadata area on this device in current units | size |
Table C.5, “Logical Volume Fields” describes the physical volume fields and their field types.
| Physical Volume Field | Description | Field Type |
|---|---|---|
pe_start | Offset to the start of data on the underlying device | number |
pv_size | Size of physical volume in current units | size |
pv_free | Total amount of unallocated space in current units | size |
pv_used | Total amount of allocated space in current units | size |
pv_attr | Various attributes | string |
pv_allocatable | Set if this device can be used for allocation | number |
pv_exported | Set if this device is exported | number |
pv_missing | Set if this device is missing in system | number |
pv_pe_count | Total number of physical extents | number |
pv_pe_alloc_count | Total number of allocated physical extents | number |
pv_tags | Tags, if any | string list |
pv_mda_count | Number of metadata areas on this device | number |
pv_mda_used_count | Number of metadata areas in use on this device | number |
pv_ba_start | Offset to the start of PV Bootloader Area on the underlying device in current units | size |
pv_ba_size | Size of PV Bootloader Area in current units | size |
Table C.11, “Volume Group Fields” describes the volume group fields and their field types.
| Volume Group Field | Description | Field Type |
|---|---|---|
vg_fmt | Type of metadata | string |
vg_uuid | Unique identifier | string |
vg_name | Name | string |
vg_attr | Various attributes | string |
vg_permissions | Volume group permissions | string |
vg_extendable | Set if volume group is extendable | number |
vg_exported | Set if volume group is exported | number |
vg_partial | Set if volume group is partial | number |
vg_allocation_policy | Volume group allocation policy | string |
vg_clustered | Set if volume group is clustered | number |
vg_size | Total size of volume group in current units | size |
vg_free | Total amount of free space in current units | size |
vg_sysid | System ID of the volume group indicating which host owns it | string |
vg_systemid | System ID of the volume group indicating which host owns it | string |
vg_extent_size | Size of physical extents in current units | size |
vg_extent_count | Total number of physical extents | number |
vg_free_count | Total number of unallocated physical extents | number |
max_lv | Maximum number of logical volumes allowed in volume group or 0 if unlimited | number |
max_pv | Maximum number of physical volumes allowed in volume group or 0 if unlimited | number |
pv_count | Number of physical volumes | number |
lv_count | Number of logical volumes | number |
snap_count | Number of snapshots | number |
vg_seqno | Revision number of internal metadata — incremented whenever it changes | number |
vg_tags | Tags, if any | string list |
vg_profile | Configuration profile attached to this volume group | string |
vg_mda_count | Number of metadata areas on this volume group | number |
vg_mda_used_count | Number of metadata areas in use on this volume group | number |
vg_mda_free | Free metadata area space for this volume group in current units | size |
vg_mda_size | Size of smallest metadata area for this volume group in current units | size |
vg_mda_copies | Target number of in use metadata areas in the volume group | number |
Table C.12, “Logical Volume Segment Fields” describes the logical volume segment fields and their field types.
| Logical Volume Segment Field | Description | Field Type |
|---|---|---|
segtype | Type of logical volume segment | string |
stripes | Number of stripes or mirror legs | number |
stripesize | For stripes, amount of data placed on one device before switching to the next | size |
stripe_size | For stripes, amount of data placed on one device before switching to the next | size |
regionsize | For mirrors, the unit of data copied when synchronizing devices | size |
region_size | For mirrors, the unit of data copied when synchronizing devices | size |
chunksize | For snapshots, the unit of data used when tracking changes | size |
chunk_size | For snapshots, the unit of data used when tracking changes | size |
thin_count | For thin pools, the number of thin volumes in this pool | number |
discards | For thin pools, how discards are handled | string |
cachemode | For cache pools, how writes are cached | string |
zero | For thin pools, if zeroing is enabled | number |
transaction_id | For thin pools, the transaction id | number |
thin_id | For thin volumes, the thin device id | number |
seg_start | Offset within the logical volume to the start of the segment in current units | size |
seg_start_pe | Offset within the logical volume to the start of the segment in physical extents. | number |
seg_size | Size of segment in current units | size |
seg_size_pe | Size of segment in physical extents | size |
seg_tags | Tags, if any | string list |
seg_pe_ranges | Ranges of physical extents of underlying devices in command line format | string |
devices | Underlying devices used with starting extent numbers | string |
seg_monitor | dmeventd monitoring status of the segment | string |
cache_policy | The cache policy (cached segments only) | string |
cache_settings | Cache settings/parameters (cached segments only) | string list |
Table C.13, “Pysical Volume Segment Fields” describes the physical volume segment fields and their field types.
| Physical Volume Segment Field | Description | Field Type |
|---|---|---|
pvseg_start | Physical extent number of start of segment | number |
pvseg_size | Number of extents in segment | number |
Table C.14, “Selection Criteria Synonyms” lists the synonyms you can use for field values. These synonyms can be used in selection criteria as well as for values just like their original values. In this table, a field value of "" indicates a blank string, which can be matched by specifying
-S 'field_name=""'.
In this table, a field indicated by 0 or 1 indicates a binary value. You can specify a
--binary option for reporting tools which causes binary fields to display 0 or 1 instead of what is indicated in this table as "some text" or "".
| Field | Field Value | Synonyms |
|---|---|---|
pv_allocatable | allocatable | 1 |
pv_allocatable | "" | 0 |
pv_exported | exported | 1 |
pv_exported | "" | 0 |
pv_missing | missing | 1 |
pv_missing | "" | 0 |
vg_extendable | extendable | 1 |
vg_extendable | "" | 0 |
vg_exported | exported | 1 |
vg_exported | "" | 0 |
vg_partial | partial | 1 |
vg_partial | "" | 0 |
vg_clustered | clustered | 1 |
vg_clustered | "" | 0 |
vg_permissions | writeable | rw, read-write |
vg_permissions | read-only | r, ro |
vg_mda_copies | unmanaged | unknown, undefined, undef, -1 |
lv_initial_image_sync | initial image sync | sync, 1 |
lv_initial_image_sync | "" | 0 |
lv_image_synced | image synced | synced, 1 |
lv_image_synce | "" | 0 |
lv_merging | merging | 1 |
lv_merging | "" | 0 |
lv_converting | converting | 1 |
lv_converting | "" | 0 |
lv_allocation_locked | allocation locked | locked, 1 |
lv_allocation_locked | "" | 0 |
lv_fixed_minor | fixed minor | fixed, 1 |
lv_fixed_minor | "" | 0 |
lv_active_locally | active locally | active, locally, 1 |
lv_active_locally | "" | 0 |
lv_active_remotely | active remotely | active, remotely, 1 |
lv_active_remotely | "" | 0 |
lv_active_exclusively | active exclusively | active, exclusively, 1 |
lv_active_exclusively | "" | 0 |
lv_merge_failed | merge failed | failed, 1 |
lv_merge_failed | "" | 0 |
lv_snapshot_invalid | snapshot invalid | invalid, 1 |
lv_snapshot_invalid | "" | 0 |
lv_suspended | suspended | 1 |
lv_suspended | "" | 0 |
lv_live_table | live table present | live table, live, 1 |
lv_live_table | "" | 0 |
lv_inactive_table | inactive table present | inactive table, inactive, 1 |
lv_inactive_table | "" | 0 |
lv_device_open | open | 1 |
lv_device_open | "" | 0 |
lv_skip_activation | skip activation | skip, 1 |
lv_skip_activation | "" | 0 |
zero | zero | 1 |
zero | "" | 0 |
lv_permissions | writeable | rw, read-write |
lv_permissions | read-only | r, ro |
lv_permissions | read-only-override | ro-override, r-override, R |
lv_when_full | error | error when full, error if no space |
lv_when_full | queue | queue when full, queue if no space |
lv_when_full | "" | undefined |
cache_policy | "" | undefined |
seg_monitor | "" | undefined |
lv_health_status | "" | undefined |
C.3.1. Specifying Time Values
When specifying time values for LVM selection, you can use either a standardized time specification format or a more free-form specification, as described in Section C.3.1.1, “Standard time selection format” and Section C.3.1.2, “Freeform time selection format”.
You can specify the way time values are displayed with the report/time format configuration option in the
/etc/lvm/lvm.conf configuration file. Information on specifying this option is provided in the lvm.conf file.
When specifying time values, you can use the comparison operator aliases
since, after, until, and before, as described in Table C.3, “Selection Criteria Comparison Operators”.
C.3.1.1. Standard time selection format
You can specify time values for LVM selection in the following format.
date time timezone
Table C.15, “Time Specification Formats” summarizes the formats you can use when specifying these time values.
| Field | Field Value | |||
|---|---|---|---|---|
| date |
| |||
| time |
| |||
| timezone (always with + or - sign) |
|
The full date/time specification is YYYY-MM-DD hh:mm:ss. Users are able to leave date/time parts from right to left. Whenever these parts are left out, a range is assumed automatically with second granularity. For example:
- "2015-07-07 9:51" means range of "2015-07-07 9:51:00" - "2015-07-07 9:51:59"
- "2015-07" means range of "2015-07-01 0:00:00" - "2015-07-31 23:59:59"
- "2015" means range of "2015-01-01 0:00:00" - "2015-12-31 23:59:59"
The following examples show the date/time specification as used in selection criteria.
lvs -S 'time since "2015-07-07 9:51"' lvs -S 'time = "2015-07"" lvs -S 'time = "2015"'
C.3.1.2. Freeform time selection format
You can specify the date/time specification in LVM selection criteria using the following entitles.
- weekday names ("Sunday" - "Saturday" or abbreviated as "Sun" - "Sat")
- labels for points in time ("noon", "midnight")
- labels for a day relative to current day ("today", "yesterday")
- points back in time with relative offset from today (N is a number)
- ( "N" "seconds"/"minutes"/"hours"/"days"/"weeks"/"years" "ago")
- ( "N" "secs"/"mins"/"hrs" ... "ago")
- ( "N" "s"/"m"/"h" ... "ago")
- time specification either in hh:mm:ss format or with AM/PM suffixes
- month names ("January" - "December" or abbreviated as "Jan" - "Dec")
The following examples the show the freeform date/time specificaiton as used in selection criteria.
lvs -S 'time since "yesterday 9AM"' lvs -S 'time since "Feb 3 years 2 months ago"' lvs -S 'time = "February 2015"' lvs -S 'time since "Jan 15 2015" && time until yesterday' lvs -S 'time since "today 6AM"'
