Logical Volume Management Fields: Difference between revisions
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Revision as of 04:33, 23 May 2017
Internal
Logical Volume Fields
--------------------- lv_all - All fields in this section. lv_uuid - Unique identifier. lv_name - Name. LVs created for internal use are enclosed in brackets. lv_full_name - Full name of LV including its VG, namely VG/LV. lv_path - Full pathname for LV. Blank for internal LVs. lv_dm_path - Internal device-mapper pathname for LV (in /dev/mapper directory). lv_parent - For LVs that are components of another LV, the parent LV.
Logical Volume Device Info and Status Combined Fields ----------------------------------------------------- lv_all - All fields in this section. lv_attr - Various attributes - see man page.
Logical Volume Fields --------------------- lv_all - All fields in this section. lv_layout - LV layout. lv_role - LV role. lv_initial_image_sync - Set if mirror/RAID images underwent initial resynchronization. lv_image_synced - Set if mirror/RAID image is synchronized. lv_merging - Set if snapshot LV is being merged to origin. lv_converting - Set if LV is being converted. lv_allocation_policy - LV allocation policy. lv_allocation_locked - Set if LV is locked against allocation changes. lv_fixed_minor - Set if LV has fixed minor number assigned. lv_merge_failed - Set if snapshot merge failed. lv_snapshot_invalid - Set if snapshot LV is invalid. lv_skip_activation - Set if LV is skipped on activation. lv_when_full - For thin pools, behavior when full. lv_active - Active state of the LV. lv_active_locally - Set if the LV is active locally. lv_active_remotely - Set if the LV is active remotely. lv_active_exclusively - Set if the LV is active exclusively. lv_major - Persistent major number or -1 if not persistent. lv_minor - Persistent minor number or -1 if not persistent. lv_read_ahead - Read ahead setting in current units. lv_size - Size of LV in current units. lv_metadata_size - For thin and cache pools, the size of the LV that holds the metadata. seg_count - Number of segments in LV. origin - For snapshots and thins, the origin device of this LV. origin_uuid - For snapshots and thins, the UUID of origin device of this LV. origin_size - For snapshots, the size of the origin device of this LV. lv_ancestors - LV ancestors ignoring any stored history of the ancestry chain. lv_full_ancestors - LV ancestors including stored history of the ancestry chain. lv_descendants - LV descendants ignoring any stored history of the ancestry chain. lv_full_descendants - LV descendants including stored history of the ancestry chain.
Logical Volume Device Status Fields ----------------------------------- lv_all - All fields in this section. data_percent - For snapshot, cache and thin pools and volumes, the percentage full if LV is active. snap_percent - For snapshots, the percentage full if LV is active. metadata_percent - For cache and thin pools, the percentage of metadata full if LV is active. copy_percent - For Cache, RAID, mirrors and pvmove, current percentage in-sync. sync_percent - For Cache, RAID, mirrors and pvmove, current percentage in-sync.
Logical Volume Fields --------------------- lv_all - All fields in this section. raid_mismatch_count - For RAID, number of mismatches found or repaired. raid_sync_action - For RAID, the current synchronization action being performed. raid_write_behind - For RAID1, the number of outstanding writes allowed to writemostly devices. raid_min_recovery_rate - For RAID1, the minimum recovery I/O load in kiB/sec/disk. raid_max_recovery_rate - For RAID1, the maximum recovery I/O load in kiB/sec/disk. move_pv - For pvmove, Source PV of temporary LV created by pvmove. move_pv_uuid - For pvmove, the UUID of Source PV of temporary LV created by pvmove. convert_lv - For lvconvert, Name of temporary LV created by lvconvert. convert_lv_uuid - For lvconvert, UUID of temporary LV created by lvconvert. mirror_log - For mirrors, the LV holding the synchronisation log. mirror_log_uuid - For mirrors, the UUID of the LV holding the synchronisation log. data_lv - For thin and cache pools, the LV holding the associated data. data_lv_uuid - For thin and cache pools, the UUID of the LV holding the associated data. metadata_lv - For thin and cache pools, the LV holding the associated metadata. metadata_lv_uuid - For thin and cache pools, the UUID of the LV holding the associated metadata. pool_lv - For thin volumes, the thin pool LV for this volume. pool_lv_uuid - For thin volumes, the UUID of the thin pool LV for this volume. lv_tags - Tags, if any. lv_profile - Configuration profile attached to this LV. lv_lockargs - Lock args of the LV used by lvmlockd. lv_time - Creation time of the LV, if known lv_time_removed - Removal time of the LV, if known lv_host - Creation host of the LV, if known. lv_modules - Kernel device-mapper modules required for this LV. lv_historical - Set if the LV is historical.
Logical Volume Device Info Fields --------------------------------- lv_all - All fields in this section. lv_kernel_major - Currently assigned major number or -1 if LV is not active. lv_kernel_minor - Currently assigned minor number or -1 if LV is not active. lv_kernel_read_ahead - Currently-in-use read ahead setting in current units. lv_permissions - LV permissions. lv_suspended - Set if LV is suspended. lv_live_table - Set if LV has live table present. lv_inactive_table - Set if LV has inactive table present. lv_device_open - Set if LV device is open.
Logical Volume Device Status Fields ----------------------------------- lv_all - All fields in this section. cache_total_blocks - Total cache blocks. cache_used_blocks - Used cache blocks. cache_dirty_blocks - Dirty cache blocks. cache_read_hits - Cache read hits. cache_read_misses - Cache read misses. cache_write_hits - Cache write hits. cache_write_misses - Cache write misses. kernel_cache_settings - Cache settings/parameters as set in kernel, including default values (cached segments only). kernel_cache_policy - Cache policy used in kernel. lv_health_status - LV health status. kernel_discards - For thin pools, how discards are handled in kernel. lv_check_needed - For thin pools and cache volumes, whether metadata check is needed.
Physical Volume Label Fields ---------------------------- pv_all - All fields in this section. pv_fmt - Type of metadata. pv_uuid - Unique identifier. dev_size - Size of underlying device in current units. pv_name - Name. pv_major - Device major number. pv_minor - Device minor number. pv_mda_free - Free metadata area space on this device in current units. pv_mda_size - Size of smallest metadata area on this device in current units. pv_ext_vsn - PV header extension version.
Physical Volume Fields ---------------------- pv_all - All fields in this section. pe_start - Offset to the start of data on the underlying device. pv_size - Size of PV in current units. pv_free - Total amount of unallocated space in current units. pv_used - Total amount of allocated space in current units. pv_attr - Various attributes - see man page. pv_allocatable - Set if this device can be used for allocation. pv_exported - Set if this device is exported. pv_missing - Set if this device is missing in system. pv_pe_count - Total number of Physical Extents. pv_pe_alloc_count - Total number of allocated Physical Extents. pv_tags - Tags, if any. pv_mda_count - Number of metadata areas on this device. pv_mda_used_count - Number of metadata areas in use on this device. pv_ba_start - Offset to the start of PV Bootloader Area on the underlying device in current units. pv_ba_size - Size of PV Bootloader Area in current units. pv_in_use - Set if PV is used. pv_duplicate - Set if PV is an unchosen duplicate.
Volume Group Fields ------------------- vg_all - All fields in this section. vg_fmt - Type of metadata. vg_uuid - Unique identifier. vg_name - Name. vg_attr - Various attributes - see man page. vg_permissions - VG permissions. vg_extendable - Set if VG is extendable. vg_exported - Set if VG is exported. vg_partial - Set if VG is partial. vg_allocation_policy - VG allocation policy. vg_clustered - Set if VG is clustered. vg_size - Total size of VG in current units. vg_free - Total amount of free space in current units. vg_sysid - System ID of the VG indicating which host owns it. vg_systemid - System ID of the VG indicating which host owns it. vg_lock_type - Lock type of the VG used by lvmlockd. vg_lock_args - Lock args of the VG used by lvmlockd. vg_extent_size - Size of Physical Extents in current units. vg_extent_count - Total number of Physical Extents. vg_free_count - Total number of unallocated Physical Extents. max_lv - Maximum number of LVs allowed in VG or 0 if unlimited. max_pv - Maximum number of PVs allowed in VG or 0 if unlimited. pv_count - Number of PVs in VG. vg_missing_pv_count - Number of PVs in VG which are missing. lv_count - Number of LVs. snap_count - Number of snapshots. vg_seqno - Revision number of internal metadata. Incremented whenever it changes. vg_tags - Tags, if any. vg_profile - Configuration profile attached to this VG. vg_mda_count - Number of metadata areas on this VG. vg_mda_used_count - Number of metadata areas in use on this VG. vg_mda_free - Free metadata area space for this VG in current units. vg_mda_size - Size of smallest metadata area for this VG in current units. vg_mda_copies - Target number of in use metadata areas in the VG.
Logical Volume Segment Fields ----------------------------- seg_all - All fields in this section. segtype - Type of LV segment. stripes - Number of stripes or mirror legs. stripe_size - For stripes, amount of data placed on one device before switching to the next. region_size - For mirrors, the unit of data copied when synchronising devices. chunk_size - For snapshots, the unit of data used when tracking changes. thin_count - For thin pools, the number of thin volumes in this pool. discards - For thin pools, how discards are handled. cache_mode - For cache pools, how writes are cached. zero - For thin pools and volumes, if zeroing is enabled. transaction_id - For thin pools, the transaction id and creation transaction id for thins. thin_id - For thin volume, the thin device id. seg_start - Offset within the LV to the start of the segment in current units. seg_start_pe - Offset within the LV to the start of the segment in physical extents. seg_size - Size of segment in current units. seg_size_pe - Size of segment in physical extents. seg_tags - Tags, if any. seg_pe_ranges - Ranges of Physical Extents of underlying devices in command line format (deprecated, use seg_le_ranges for common format). seg_le_ranges - Ranges of Logical Extents of underlying devices in command line format. seg_metadata_le_ranges - Ranges of Logical Extents of underlying metadata devices in command line format. devices - Underlying devices used with starting extent numbers. metadata_devices - Underlying metadata devices used with starting extent numbers. seg_monitor - Dmeventd monitoring status of the segment. cache_policy - The cache policy (cached segments only). cache_settings - Cache settings/parameters (cached segments only).
Physical Volume Segment Fields ------------------------------ pvseg_all - All fields in this section. pvseg_start - Physical Extent number of start of segment. pvseg_size - Number of extents in segment.
Special Fields -------------- selected - Set if item passes selection criteria. help - Show help. ? - Show help.