From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailgw-01.dd24.net ([193.46.215.41]:51736 "EHLO mailgw-01.dd24.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753052AbbKXVRS (ORCPT ); Tue, 24 Nov 2015 16:17:18 -0500 Message-ID: <1448399833.21291.84.camel@scientia.net> Subject: Re: btrfs send reproducibly fails for a specific subvolume after sending 15 GiB, scrub reports no errors From: Christoph Anton Mitterer To: Austin S Hemmelgarn , Duncan <1i5t5.duncan@cox.net>, Nils Steinger , linux-btrfs Date: Tue, 24 Nov 2015 22:17:13 +0100 In-Reply-To: <5654CF58.8080207@gmail.com> References: <56530608.50906@gmail.com> <20151123211012.GA12286@ny.voidptr.de> <56545C1B.1080507@gmail.com> <1448390914.21291.42.camel@scientia.net> <5654CC1B.4030209@gmail.com> <1448398257.21291.63.camel@scientia.net> <5654CF58.8080207@gmail.com> Content-Type: multipart/signed; micalg="sha-512"; protocol="application/x-pkcs7-signature"; boundary="=-/qO19zqXx39ssGgerBSv" Mime-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: --=-/qO19zqXx39ssGgerBSv Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2015-11-24 at 15:58 -0500, Austin S Hemmelgarn wrote: > I had tried using send/receive once with -p, but had numerous issues. =C2=A0 > The incrementals I've been doing have used -c instead, and I hadn't had= =C2=A0 > any issues with data loss with that.=C2=A0=C2=A0The issue outlined here w= as only a=C2=A0 > small part of why I stopped using it for backups.=C2=A0=C2=A0The main rea= son was=C2=A0 > to provide better consistency between my local copies and what I upload= =C2=A0 > to S3/Dropbox, meaning I only have to test one back up image per=C2=A0 > filesystem backed-up, instead of two. Okay maybe I just don't understand how to use send/receive correctly... What I have is about the following (simplified): master-fs: 5 | +--data (subvol, my precious data) | +--snapshots =C2=A0 =C2=A0| =C2=A0 =C2=A0+--2015-11-01 (suvol, ro-snapshot of /data) So 2015-11-01 is basically the first snapshot ever made. Now I want to have it on: backup-fs +--2015-11-01 (suvol, ro-snapshot of /data) So far I did btrfs send /master-fs/snapshots/2015-11-01 | btrfs receive /backup-fs/2015-= 11-01 Then time goes by and=C2=A0I get new content in the data subvol, so what I'd like to have then is a new snapshot on the master-fs: 5 | +--data (subvol, more of my precious data) | +--snapshots =C2=A0 =C2=A0| =C2=A0 =C2=A0+--2015-11-01 (suvol, ro-snapshot of /data) =C2=A0 =C2=A0+--2015-11-20 (suvol, ro-snapshot of /data) And this should go incrementally on backup-fs: backup-fs +--2015-11-01 (suvol, ro-snapshot of /data) +--2015-11-20 (suvol, ro-snapshot of /data) So far I used something like: btrfs send -p=C2=A02015-11-01 /master-fs/snapshots/2015-11-20 | btrfs recei= ve /backup-fs/2015-11-20 And obviously I want it to share all the ref-links and stuf... So in other words, what's the difference between -p and -c? :D Thx, Chris. --=-/qO19zqXx39ssGgerBSv Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCEZIw ggW/MIIDp6ADAgECAgMCOakwDQYJKoZIhvcNAQENBQAwVDEUMBIGA1UEChMLQ0FjZXJ0IEluYy4x HjAcBgNVBAsTFWh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzEcMBoGA1UEAxMTQ0FjZXJ0IENsYXNzIDMg Um9vdDAeFw0xNDA2MTIxNjM2MThaFw0xNjA2MTExNjM2MThaMHwxITAfBgNVBAMTGENocmlzdG9w aCBBbnRvbiBNaXR0ZXJlcjEkMCIGCSqGSIb3DQEJARYVY2FsZXN0eW9Ac2NpZW50aWEubmV0MTEw LwYJKoZIhvcNAQkBFiJtYWlsQGNocmlzdG9waC5hbnRvbi5taXR0ZXJlci5uYW1lMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4phP/j9vT9dZT+k3ffHxvRWMOuzBnu5O3Fl4y2+WL7pL rfLiEhWzGXhHvjSqpt4vCNSdqy43453nnu8+hMb+uEtqSIL1AHU5eLhuDNVN9S4bt9E7nA2WKYBU LCUi/xCD/GL7ToyJNwhrhzcCZ7pXSc3xVqFoC4f6weU9ExhoEZQNRpTM0BFCOi4fRxvKFNnUYgjK 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