Re: boot from snapshot and take snapshot from here.
On Sat, Nov 07, 2015 at 08:04:01PM +0100, Jakob Schürz wrote: > Hi there! > > I can't find any Information for my Problem. And I try to explain, what > I want. [snip] > BUT > > When i boot from f.e. @debian-snap2, the mechanics doesn't work any longer. > > btrfs subvol snapshot @debian-snap2 @debian-snap3 > > this works. > > btrfs send -p @debian-snap2 debian-snap3 | btrfs receive /backupmountpoint > > gives me an error, that btrfs can't find a subvol with a proper ID. > > Ho to do this, if i want to boot from a former snapshot (in case of a > mistaken system-upgrade) and i want to transfer the later snapshots to > the external HD - only the differences? Basically, you can't right now. It's a known limitation, and can, I think, be fixed, but it'll need a change to the send stream format, which is a tricky migration to do (because there's currently no format identifier in it, which makes it hard to handle both formats easily). > There is nothing on the internet on this problem (I've found). But i > think this is a usecase, which I'm not alone needing it... You're not alone. It will come eventually, but only when David's in a position to deal with the issues of changing the send stream. Hugo. -- Hugo Mills | "No! My collection of rare, incurable diseases! hugo@... carfax.org.uk | Violated!" http://carfax.org.uk/ | PGP: E2AB1DE4 |Stimpson J. Cat, The Ren & Stimpy Show signature.asc Description: Digital signature
Re: boot from snapshot and take snapshot from here.
Am 2015-11-07 um 20:18 schrieb Hugo Mills: > On Sat, Nov 07, 2015 at 08:04:01PM +0100, Jakob Schürz wrote: >> Hi there! >> >> I can't find any Information for my Problem. And I try to explain, what >> I want. > [snip] >> BUT >> >> When i boot from f.e. @debian-snap2, the mechanics doesn't work any longer. >> >> btrfs subvol snapshot @debian-snap2 @debian-snap3 >> >> this works. >> >> btrfs send -p @debian-snap2 debian-snap3 | btrfs receive /backupmountpoint >> >> gives me an error, that btrfs can't find a subvol with a proper ID. >> >> Ho to do this, if i want to boot from a former snapshot (in case of a >> mistaken system-upgrade) and i want to transfer the later snapshots to >> the external HD - only the differences? > >Basically, you can't right now. It's a known limitation, and can, I > think, be fixed, but it'll need a change to the send stream format, > which is a tricky migration to do (because there's currently no format > identifier in it, which makes it hard to handle both formats easily). > >> There is nothing on the internet on this problem (I've found). But i >> think this is a usecase, which I'm not alone needing it... > >You're not alone. It will come eventually, but only when David's in > a position to deal with the issues of changing the send stream. OK! I'm always happy, when i realize, it's not my tired mind, when i can't find the solution :) Thanks for the info. So we will wait. jakob -- http://xundeenergie.at http://verkehrsloesungen.wordpress.com/ http://cogitationum.wordpress.com/ signature.asc Description: OpenPGP digital signature
boot from snapshot and take snapshot from here.
Hi there! I can't find any Information for my Problem. And I try to explain, what I want. There is a btrfs-partition on my laptop. I take snapshots every hour from the subvolume @debian. btrfs subvol snapshot @debian @debian-snap1 Then I transfer this snapshot to my external HD btrfs send @debian-snap1 | btrfs receive /backupmountpoint The next snapshot btrfs subvol snapshot @debian @debian-snap2 Transfer is btrfs send -p @debian-snap1 @debian-snap2|btrfs receive /backupmountpoint No magic here, works fine. BUT When i boot from f.e. @debian-snap2, the mechanics doesn't work any longer. btrfs subvol snapshot @debian-snap2 @debian-snap3 this works. btrfs send -p @debian-snap2 debian-snap3 | btrfs receive /backupmountpoint gives me an error, that btrfs can't find a subvol with a proper ID. Ho to do this, if i want to boot from a former snapshot (in case of a mistaken system-upgrade) and i want to transfer the later snapshots to the external HD - only the differences? There is nothing on the internet on this problem (I've found). But i think this is a usecase, which I'm not alone needing it... jakob -- http://xundeenergie.at http://verkehrsloesungen.wordpress.com/ http://cogitationum.wordpress.com/ signature.asc Description: OpenPGP digital signature
