Re: [linux-lvm] lvm-vdo, snapshots and cache
Zdenek Kabelac <[email protected]>
| Newsgroups | dev.linux.lists.linux-lvm |
|---|---|
| Message-ID | <[email protected]> |
Dne 15. 11. 22 v 18:42 Gionatan Danti napsal(a): > Dear all, > as previous vdo utils are gone in RHEL9, VDO volumes must be created via > lvm-vdo and associated lvm commands. > > What is not clear to me is how to combine lvm-vdo with lvmthin (for fast CoW > snapshots) and/or lvmcache (for SSD caching of an HDD pool). For example, with > the old /dev/mapper/vdo style volumes (ie: the one created via vdo create) one > can do something as physical_dev -> vdo -> lvmthin -> lvmcache. > > How to do the same with lvm-vdo? Hi You could try 'vg' on top of another 'vg' - however I'd not recommend to use it this way (and it's unssuported (&unsupportable) by lvm2 in general) We aim to support multiple VDO LV within a single VDOPOOL - will hopefully happen relatively soon (so it should work like with thin pools) IMHO I'd not recommend to combine 2 provisioning technologies - it's already hard to resolve 'out-of-space' troubles with just one technology... We will see if the 'VDO thick snapshot' will also go with multiple VDO LV support - likely not - but will be added later on. Caching should be already support - on VDO LV as well as on VDOPOOL LV (both work somewhat differently). Regards Zdenek _______________________________________________ linux-lvm mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/