I am trying out the lvmcache functionality. So far, everything looks great. I have two questions: 1) The man page of lvmcache states "With the --cachemode option, the cache mode can be set when creating a cache LV, or changed on an existing cache LV." However, I can't figure out the right command to change the cache mode on an existing LV. # lvs -a -o +devices (see https://paste.fedoraproject.org/514698/83019352/raw/) # lvs -o cache_mode vg_raid10/lv_var CacheMode writethrough # lvconvert --verbose --cachemode writeback vg_raid10/lv_var (no output) # lvs -o cache_mode vg_raid10/lv_var CacheMode writethrough # lvconvert --verbose --type cache \ --cachepool vg_raid10/lv_cache_pool_var \ --cachemode writeback vg_raid10/lv_var Executing: /usr/sbin/modprobe dm-cache-mq Executing: /usr/sbin/modprobe dm-cache-smq Cache is not supported with cache segment type of the original logical volume vg_raid10/lv_var. 2) Does lvm manage TRIM on the cache device? Normally I set up SSD volumes with a weekly fstrim, but that only works for mounted filesystems. Thanks! Raman _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
