* btrfs send/receive in reverse possible? @ 2018-02-16 2:43 Sampson Fung 2018-02-16 9:38 ` Hugo Mills 0 siblings, 1 reply; 2+ messages in thread From: Sampson Fung @ 2018-02-16 2:43 UTC (permalink / raw) To: linux-btrfs I have snapshot A on Drive_A. I send snapshot A to an empty Drive_B. Then keep Drive_A as backup. I use Drive_B as active. I create new snapshot B on Drive_B. Can I use btrfs send/receive to send incremental differences back to Drive_A? What is the correct way of doing this? Regards, Sampson ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: btrfs send/receive in reverse possible? 2018-02-16 2:43 btrfs send/receive in reverse possible? Sampson Fung @ 2018-02-16 9:38 ` Hugo Mills 0 siblings, 0 replies; 2+ messages in thread From: Hugo Mills @ 2018-02-16 9:38 UTC (permalink / raw) To: Sampson Fung; +Cc: linux-btrfs [-- Attachment #1: Type: text/plain, Size: 802 bytes --] On Fri, Feb 16, 2018 at 10:43:54AM +0800, Sampson Fung wrote: > I have snapshot A on Drive_A. > I send snapshot A to an empty Drive_B. Then keep Drive_A as backup. > I use Drive_B as active. > I create new snapshot B on Drive_B. > > Can I use btrfs send/receive to send incremental differences back to Drive_A? > What is the correct way of doing this? You can't do it with the existing tools -- it needs a change to the send stream format. Here's a write-up of what's going on behind the scenes, and what needs to change: https://www.spinics.net/lists/linux-btrfs/msg44089.html Hugo. -- Hugo Mills | I can't foretell the future, I just work there. hugo@... carfax.org.uk | http://carfax.org.uk/ | PGP: E2AB1DE4 | The Doctor [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 2+ messages in thread
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