On 10/04/2012 11:00 PM, Stuart D Gathman wrote: > On 10/04/2012 11:02 AM, Mark Woodward expounded in part: >> >>> snapshot target and metadata format. It does not share code with >>> current (or historic afaik) LVM2/device-mapper and has been dead for a >>> number of years (last commits around 2008). >>> >>>> get the code. It old and not supported currently, but still works. >>>> I >>> Really? I'd be surprised if it even builds against modern kernels or >>> device-mapper. >> ddsnap was the Zumastor snapshot tool which uses a different in-kernel >> Well..... >> The LVM2 code that ships with most distros still uses the old >> interfaces and still (Ubuntu 12.04) seemst to create a COW file with SnAp > > This utility (ddsnap work alike) requires no kernel changes, and only > depends on the layout of the COW (and only on the changed block table): > > http://www.opensvc.com/init/default/doc_storage_dds This is closer to the kind of thing that Linda was originally asking about. It seems to let you extract deltas and move them around and re-apply them for replication purposes so it's similar to ddsnap in that it's distributed although as you say it's entirely in userspace and doesn't requite the ddsnap device-mapper target. Regards, Bryn. _______________________________________________ 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/
