Red Hat Bugzilla – Bug 1255503
'--cachepolicy' is documented in both lvconvert and lvchange yet either doesn't work or does but isn't supposed to
Last modified: 2015-11-19 07:47:36 EST
Description of problem: This is a continuation from bug 1255171#c3. # This works, but apparently isn't supposed to. lvchange(8) --cachepolicy policy, --cachesettings key=value Only applicable to cached LVs; see also lvmcache(7). Sets the cache policy and its associated tunable settings. In most use-cases, default values should be adequate. # This is supposed to work but doesn't? lvconvert(8) --cachepolicy policy Only applicable to cached LVs; see also lvmcache(7). Sets the cache policy. mq is the basic policy name. sqm is more advanced version available in newer kernels. ** Both lvcreate(8) and lvconvert(8) have this "sqm" typo that needs to be fixed. ** [root@host-109 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert display_cache cache_sanity -wi-a----- 4.00g [root@host-109 ~]# lvcreate -L 12M -n pool_meta cache_sanity /dev/sda1 Logical volume "pool_meta" created. [root@host-109 ~]# lvcreate -L 4G -n pool cache_sanity /dev/sda1 Logical volume "pool" created. # Can't use --cachepolicy here [root@host-109 ~]# lvconvert --yes --cachepolicy smq --type cache-pool --cachemode writethrough -c 64 --poolmetadata cache_sanity/pool_meta cache_sanity/pool lvconvert: unrecognized option '--cachepolicy' Error during parsing of command line. [root@host-109 ~]# lvconvert --yes --type cache-pool --cachemode writethrough -c 64 --poolmetadata cache_sanity/pool_meta cache_sanity/pool WARNING: Converting logical volume cache_sanity/pool and cache_sanity/pool_meta to pool's data and metadata volumes. THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.) Converted cache_sanity/pool to cache pool. [root@host-109 ~]# lvs -a -o +devices LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices display_cache cache_sanity -wi-a----- 4.00g /dev/sdd1(0) [lvol0_pmspare] cache_sanity ewi------- 12.00m /dev/sdc1(0) pool cache_sanity Cwi---C--- 4.00g pool_cdata(0) [pool_cdata] cache_sanity Cwi------- 4.00g /dev/sda1(3) [pool_cmeta] cache_sanity ewi------- 12.00m /dev/sda1(0) # Can't use --cachepolicy here [root@host-109 ~]# lvconvert --yes --cachepolicy smq --type cache --cachepool cache_sanity/pool cache_sanity/display_cache lvconvert: unrecognized option '--cachepolicy' Error during parsing of command line. [root@host-109 ~]# lvconvert --yes --type cache --cachepool cache_sanity/pool cache_sanity/display_cache Logical volume cache_sanity/display_cache is now cached. [root@host-109 ~]# lvs -a -o +devices LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices display_cache cache_sanity Cwi-a-C--- 4.00g [pool] [display_cache_corig] 0.00 4.39 100.00 display_cache_corig(0) [display_cache_corig] cache_sanity owi-aoC--- 4.00g /dev/sdd1(0) [lvol0_pmspare] cache_sanity ewi------- 12.00m /dev/sdc1(0) [pool] cache_sanity Cwi---C--- 4.00g 0.00 4.39 100.00 pool_cdata(0) [pool_cdata] cache_sanity Cwi-ao---- 4.00g /dev/sda1(3) [pool_cmeta] cache_sanity ewi-ao---- 12.00m /dev/sda1(0) # Can't use --cachepolicy here [root@host-109 ~]# lvconvert --yes --cachepolicy smq cache_sanity/display_cache lvconvert: unrecognized option '--cachepolicy' Version-Release number of selected component (if applicable): 3.10.0-306.el7.x86_64 lvm2-2.02.128-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 lvm2-libs-2.02.128-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 lvm2-cluster-2.02.128-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 device-mapper-1.02.105-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 device-mapper-libs-1.02.105-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 device-mapper-event-1.02.105-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 device-mapper-event-libs-1.02.105-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 device-mapper-persistent-data-0.5.5-1.el7 BUILT: Thu Aug 13 09:58:10 CDT 2015 cmirror-2.02.128-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015 sanlock-3.2.4-1.el7 BUILT: Fri Jun 19 12:48:49 CDT 2015 sanlock-lib-3.2.4-1.el7 BUILT: Fri Jun 19 12:48:49 CDT 2015 lvm2-lockd-2.02.128-1.el7 BUILT: Tue Aug 18 03:45:17 CDT 2015
Missing part of cache enhancement for lvconvert - upstreamed via this commit: https://www.redhat.com/archives/lvm-devel/2015-August/msg00165.html
Checked that --cachepolicy does now work with both lvchange and lvconvert. Marking this bug verified in the latest rpms. However two bug regarding --cachepolicy still currently exist in 7.2 (bug 1269677 and bug 1269679). 3.10.0-319.el7.x86_64 lvm2-2.02.130-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 lvm2-libs-2.02.130-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 lvm2-cluster-2.02.130-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 device-mapper-1.02.107-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 device-mapper-libs-1.02.107-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 device-mapper-event-1.02.107-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 device-mapper-event-libs-1.02.107-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 device-mapper-persistent-data-0.5.5-1.el7 BUILT: Thu Aug 13 09:58:10 CDT 2015 cmirror-2.02.130-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015 sanlock-3.2.4-1.el7 BUILT: Fri Jun 19 12:48:49 CDT 2015 sanlock-lib-3.2.4-1.el7 BUILT: Fri Jun 19 12:48:49 CDT 2015 lvm2-lockd-2.02.130-2.el7 BUILT: Tue Sep 15 07:15:40 CDT 2015
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-2147.html