C.4. Selection Criteria Display Examples
C.4. Selection Criteria Display Examples This section provides a series of examples showing how to use selection criteria for LVM display commands. The examples in this section use a system configured with LVM volumes that yield the following output when selection criteria are not used. The following command displays all logical volumes with "lvol[13]" in their name, using a regular expression to specify this. The following command displays all logical volumes greater than 500m in size. The following command displays all logical volumes that include thin as a logical volume role, indicating that the logical volume is used in constructing a thin pool. This example uses braces ({}) to indicate a subset in the display. The following command displays all usable top-level logical volumes, which are the logical volumes with a role of "public". If you do not specify braces ({}) in a string list to indicate a subset, it is assumed by default; specifying lv_role=public is equivalent to specifying lv_role={public} . The following command displays all logical volumes with a thin layout. The following command displays all logical volumes with a layout field that matches "sparse,thin" exactly. Note that it is not necessary to specify the string list members for the match to be positive. The following command displays the logical volume names of the logical volumes that are thin, sparse logical volumes. Note that the list of fields used for selection criteria do not need to be the same as the list of fields to display.
lvs -a -o+layout,role LV VG Attr LSize Pool Origin Data% Meta% Layout Role root f1 -wi-ao---- 9.01g linear public swap f1 -wi-ao---- 512.00m linear public [lvol0_pmspare] vg ewi------- 4.00m linear private, pool,spare lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol2 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public, origin, thinorigin lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public, snapshot, thinsnapshot pool vg twi-aotz-- 100.00m 0.00 1.07 thin,pool private [pool_tdata] vg Twi-ao---- 100.00m linear private, thin,pool, data [pool_tmeta] vg ewi-ao---- 4.00m linear private, thin,pool, metadata lvs -a -o+layout,role -S 'lv_name=~lvol[13]' LV VG Attr LSize Pool Origin Data% Layout Role lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public,snapshot,thinsnapshot lvs -a -o+layout,role -S 'lv_size>500m' LV VG Attr LSize Pool Origin Data% Layout Role root f1 -wi-ao---- 9.01g linear public swap f1 -wi-ao---- 512.00m linear public lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol2 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public,origin,thinorigin lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public,snapshot, thinsnapshot lvs -a -o+layout,role -S 'lv_role={thin}' LV VG Attr LSize Layout Role [pool_tdata] vg Twi-ao---- 100.00m linear private,thin,pool,data [pool_tmeta] vg ewi-ao---- 4.00m linear private,thin,pool,metadata lvs -a -o+layout,role -S 'lv_role=public' LV VG Attr LSize Pool Origin Data% Layout Role root f1 -wi-ao---- 9.01g linear public swap f1 -wi-ao---- 512.00m linear public lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol2 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public,origin,thinorigin lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public,snapshot,thinsnapshot lvs -a -o+layout,role -S 'lv_layout={thin}' LV VG Attr LSize Pool Origin Data% Meta% Layout Role lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol2 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public,origin, thinorigin lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public,snapshot, thinsnapshot pool vg twi-aotz-- 100.00m 0.00 1.07 thin,pool private lvs -a -o+layout,role -S 'lv_layout=[sparse,thin]' LV VG Attr LSize Pool Origin Data% Layout Role lvol1 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public lvol2 vg Vwi-a-tz-- 1.00g pool 0.00 thin,sparse public,origin,thinorigin lvol3 vg Vwi---tz-k 1.00g pool lvol2 thin,sparse public,snapshot,thinsnapshot lvs -a -o lv_name -S 'lv_layout=[sparse,thin]' LV lvol1 lvol2 lvol3