Thank you! That clears up a few questions! Regards. Sergei. On 21 June 2016 at 04:27, Brassow Jonathan <jbrassow@redhat.com> wrote: > >> On Jun 11, 2016, at 7:36 PM, sergei <sergei.franco@gmail.com> wrote: >> >> Hi, >> >> I have a few simple questions regarding relatively new feature LVM cache/dm-cache. >> >> From second hand information on internet, it appears that you cannot resize cached volume. >> Please correct me if I am wrong: to resize a cached volume, one needs to lvremove the cache, resize and recreate the cache? > > This is true at the moment. You are likely to be able to simply resize online in the future. > >> In scenario where cache device fails, how safe is the data on the cached LVM? > > If you are using writethrough, quite safe. If you are using ‘writeback’, probably not (RAID for your cache in this case would probably be wise). > >> Is it possible to make snapshots of the cached device? > > easy answer is “no”. > > complicated answer includes a ‘yes’. You can cache a poolDataLV, then your thinLV and all its thinSnaps would be cached. > > brassow > > _______________________________________________ > 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/ _______________________________________________ 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/
