one answer... www.bakbone.com On Wed, Oct 8, 2008 at 6:20 PM, Oliver Fromme <[EMAIL PROTECTED]>wrote:
> Dag-Erling Smørgrav wrote: > > "Zaphod Beeblebrox" <[EMAIL PROTECTED]> writes: > > > "Dag-Erling Smørgrav" <[EMAIL PROTECTED]> writes: > > > > What really annoys me with this thread is that nobody has provided > > > > any information at all that would allow someone to understand what > > > > needs to be done and estimate how hard it would be. > > > Well... I hinted that a hammer port would be sufficient (although they > > > need to finish their replication design) and I hinted that the hammer > > > approach may be graftable to ZFS. Both reasonably large effort-wise > > > (but probably within the scope of a single developer with sufficient > > > time). > > > > No... you're so far off the mark it's not even funny, especially when > > it's been repeatedly pointed out to you. This is not a file system, > > it's a backup system. It's not designed to survive a disk crash or an > > accidental file deletion, it's designed to survive a direct missile > > strike on your colo center. > > > > To quote Wikipedia, "CDP is a service that captures changes to data to a > > separate storage location" - emphasis on "separate". > > FWIW, the HAMMER file system _does_ support replication to > remote targets (thus "separate"). Unfortunately they call > this feature "mirroring", which is misleading at best. > It's really rather a replication mechanism, much like the > binlog of MySQL. It can be used for various purposes, > including live mirroring, delayed mirroring, archiving, > backup and point-in-time recovery. > > Well, of course, all of that doesn't help us at all because > HAMMER doesn't exist on FreeBSD. > > However, ZFS does exist on FreeBSD, and I think it wouldn't > be impossible to add similar features to ZFS. > > Another possibility would be to extend gjournal by adding > time stamps to journal transactions and a possibility to > feed the journal to a pipe, socket or whatever. And of > course a client-side implementation that does something > useful with the journal stream. This might even be a good > SoC project. > > Best regards > Oliver > > -- > Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. > Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: > secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- > chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart > > FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd > > "File names are infinite in length, where infinity is set to 255 > characters." > -- Peter Collinson, "The Unix File System" > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
