>>>>> "Joe" == Joe Thornber <thornber@redhat.com> writes: Joe> On Sun, Feb 07, 2016 at 10:43:30AM -0800, Nikolaus Rath wrote: >> Is that the wrong expectation? But even then, shouldn't I at least see >> some improvement? Joe> Firstly, if you have the latest software, I suggest you switch to Joe> the smq cache policy which is generally out performing the old mq Joe> policy substantially. Is there a tool to help measure lvmcache performance metrics and display how well the cache is working? Joe> Secondly, I think you may need to reset your expectations a bit. Joe> dm-cache is a slow moving cache. It monitors IO, detectings Joe> hotspots on the disk and then 'promotes' those regions to the Joe> SSD. You may find that the reads that occur during a boot, occur Joe> only infrequently once the system is booted. I'm personally using it for caching VMs and NFS data dirs. Seems to be working well... but I wonder. _______________________________________________ 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/
