Support hard links in directories (Trac #63) #92
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boxbackup-bot
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bbackupd
defect
Incomplete Migration
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Incomplete Migration
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Trac update at 20100331T07:44:42:
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Trac update at 20100331T07:45:44: chris changed description from:
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Trac update at 20100331T07:46:52:
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Trac update at 20150102T22:21:55: chris commented:
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Commit 7970266 (on the s3_support branch, see #9) contains partial support for hard links. At least, the backup is no longer corrupted. But they are still backed up multiple times, wasting space on the backup server/client account, and will be duplicated instead of hardlinked together on restore. The solution still requires snapshot support, since this allows multiple directory entries to reference the same data object on the store. |
Ben Bennett reported the following warning message:
Jun 21 22:23:42 ayup bbackupd[24222]: WARNING: Found conflicting parent ID for file ID 1579976 (/home/fiji/public_html/pictures/49/014 - Nursery.jpg): expected 34689 but found 69964 (same directory used in two different locations?)
The warning is correct, the file is in two locations...
Chris Wilson said:
Stefan Müller Wildi said:
'''This bug can cause data corruption in your backups! Do not ignore it! The warning is a warning for a reason! '''
Migrated from https://www.boxbackup.org/ticket/63
{ "status": "assigned", "changetime": "2015-01-02T22:21:55", "description": "Ben Bennett reported the following warning message:\n\nJun 21 22:23:42 ayup bbackupd[24222]: WARNING: Found conflicting parent ID for file ID 1579976 (/home/fiji/public_html/pictures/49/014 - Nursery.jpg): expected 34689 but found 69964 (same directory used in two different locations?)\n\nThe warning is correct, the file is in two locations...\n\n{{{\n# ls -li '/home/fiji/public_html/pictures/49/013 - Nursery.jpg' '/home/fiji/public_html/family/3/013 - Nursery.jpg'\n1579975 -rw-r--r-- 2 fiji fiji 131622 2002-12-18 07:37 /home/fiji/public_html/family/3/013 - Nursery.jpg\n1579975 -rw-r--r-- 2 fiji fiji 131622 2002-12-18 07:37 /home/fiji/public_html/pictures/49/013 - Nursery.jpg\n}}}\n\nChris Wilson said:\n\n> I agree that hard links should be supported, and that this is a \n> bug. Please could you get an account in the bug tracker and file\n> a bug?\n\n> The reasons for this warning are:\n\n> 1. Almost nobody uses hard links on their data files, so nobody \n> has reported this problem before.\n \n> 2. Including the same files in two backup locations (not two \n> directories) is an error. Backing up the same file data twice \n> would be a waste of bandwidth.\n\n> 3. There was a bug on Windows where file IDs were being \n> duplicated all the time, which was only spotted because I added \n> this warning.\n \n> 4. Box Backup uses file IDs to track renaming of files. If you \n> use hard links then this will not work correctly and will cause \n> your files to be renamed between the two directories all the \n> time. This is the real bug.\n\nStefan M\u00fcller Wildi said:\n\n> I suggest introducing options to either suppress such warning \n> messages altogether (maybe by type if that is possible?) or to \n> reduce the number of warnings of identical type to 1 (like \n> \"showing only one of ##\"). Something similar must already be \n> implemented for I also read:\n\n> \"c314-stefan bbackupd[1574]: WARNING: Suppressing duplicate \n> notification about read-error\"\n\n'''This bug can cause data corruption in your backups! Do not ignore it! The warning is a warning for a reason! '''", "reporter": "bbennett", "cc": "sm8ps-boxbackup1@yahoo.com", "resolution": "", "_ts": "1420237315253075", "component": "bbackupd", "summary": "Support hard links in directories", "priority": "normal", "keywords": "backup duplicate rename hardlink corruption", "version": "0.11rc2", "time": "2010-01-11T04:34:03", "milestone": "", "owner": "chris", "type": "defect" }The text was updated successfully, but these errors were encountered: