Re: [rdiff-backup-users] [PATCH] Sparse file support
On 03/01/2011 20:27, Eric Wheeler wrote: On Sun, Jan 02, 2011 at 08:11:00PM -0800, Eric Wheeler wrote: Feedback and comments are appreciated! Original Message- From: Matthew Miller How will this interact with existing backups? rdiff-backup re-writes changed destination files, so if a source file changes, rdiff-backup will write the whole file after calculating a reverse-diff for the increment tree. Existing backup trees will become sparse over time, as files change. -Eric So I guess it is forward-compatible, but not backward-compatible? Existing repositories can be read fine with rdiff-backup patched for sparse file support, but repositories created with sparse file support cannot be read by unpatched rdiff-backup. That's okay, but it might make most of us feel that we would rather not use this patch unless we specifically need it, until it is part of mainstream rdiff-backup. Sadly, development of rdiff-backup has gone silent for a while now. I think these patches are great (as were Daniel Miller's a while ago, which provided a --verify-full option) but no one from the development side seems to be updating the code at the moment. (I would love to be proved wrong.) - Dominic ___ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki
Re: [rdiff-backup-users] [PATCH] Sparse file support
I would also love you to be proved wrong, but some weeks ago i asked the head developer if he is still active in the project and did not even get an answer. Dominic Raferd domi...@timedicer.co.uk schrieb: On 03/01/2011 20:27, Eric Wheeler wrote: On Sun, Jan 02, 2011 at 08:11:00PM -0800, Eric Wheeler wrote: Feedback and comments are appreciated! Original Message- From: Matthew Miller How will this interact with existing backups? rdiff-backup re-writes changed destination files, so if a source file changes, rdiff-backup will write the whole file after calculating a reverse-diff for the increment tree. Existing backup trees will become sparse over time, as files change. -Eric So I guess it is forward-compatible, but not backward-compatible? Existing repositories can be read fine with rdiff-backup patched for sparse file support, but repositories created with sparse file support cannot be read by unpatched rdiff-backup. That's okay, but it might make most of us feel that we would rather not use this patch unless we specifically need it, until it is part of mainstream rdiff-backup. Sadly, development of rdiff-backup has gone silent for a while now. I think these patches are great (as were Daniel Miller's a while ago, which provided a --verify-full option) but no one from the development side seems to be updating the code at the moment. (I would love to be proved wrong.) - Dominic ___ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki -- D. Kriesel / dkriesel.com ___ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki
Re: [rdiff-backup-users] [PATCH] Sparse file support
Am 04.01.2011 16:33, schrieb Dominic Raferd: So I guess it is forward-compatible, but not backward-compatible? Existing repositories can be read fine with rdiff-backup patched for sparse file support, but repositories created with sparse file support cannot be read by unpatched rdiff-backup. Looking at the patch, it only changes the way blocks of zeroes are written to disk - they are written as holes in the files instead. As sparse file are completely transparent to user-space so there should be no compatability issues whatsoever! Jakob ___ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki
