5 Commits

Author	SHA1	Message	Date
David Teigland	998e7b1075	writecache: add cvol suffix to attached cachevol ... When an LV is used as a writecache cachevol, give it the LV name a _cvol suffix. Remove the suffix when the cachevol is detached, restoring the original LV name.	2019-10-15 16:03:34 -05:00
David Teigland	a9eaab6beb	Use "cachevol" to refer to cache on a single LV ... and "cachepool" to refer to a cache on a cache pool object. The problem was that the --cachepool option was being used to refer to both a cache pool object, and to a standard LV used for caching. This could be somewhat confusing, and it made it less clear when each kind would be used. By separating them, it's clear when a cachepool or a cachevol should be used. Previously: - lvm would use the cache pool approach when the user passed a cache-pool LV to the --cachepool option. - lvm would use the cache vol approach when the user passed a standard LV in the --cachepool option. Now: - lvm will always use the cache pool approach when the user uses the --cachepool option. - lvm will always use the cache vol approach when the user uses the --cachevol option.	2019-02-27 08:52:34 -06:00
David Teigland	938b6b8253	writecache: prompt before using an LV to hold cache	2019-01-02 11:44:03 -06:00
Zdenek Kabelac	d4de3cfa4d	tests: updates	2018-11-08 12:22:18 +01:00
David Teigland	3ae5569570	Add dm-writecache support ... dm-writecache is used like dm-cache with a standard LV as the cache. $ lvcreate -n main -L 128M -an foo /dev/loop0 $ lvcreate -n fast -L 32M -an foo /dev/pmem0 $ lvconvert --type writecache --cachepool fast foo/main $ lvs -a foo -o+devices LV VG Attr LSize Origin Devices [fast] foo -wi------- 32.00m /dev/pmem0(0) main foo Cwi------- 128.00m [main_wcorig] main_wcorig(0) [main_wcorig] foo -wi------- 128.00m /dev/loop0(0) $ lvchange -ay foo/main $ dmsetup table foo-main_wcorig: 0 262144 linear 7:0 2048 foo-main: 0 262144 writecache p 253:4 253:3 4096 0 foo-fast: 0 65536 linear 259:0 2048 $ lvchange -an foo/main $ lvconvert --splitcache foo/main $ lvs -a foo -o+devices LV VG Attr LSize Devices fast foo -wi------- 32.00m /dev/pmem0(0) main foo -wi------- 128.00m /dev/loop0(0)	2018-11-06 14:18:41 -06:00