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Diffstat (limited to 'doc/bugs/FAT__58___Date_resolution_for_mtime_2s--__62___implications.mdwn')
| -rw-r--r-- | doc/bugs/FAT__58___Date_resolution_for_mtime_2s--__62___implications.mdwn | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/doc/bugs/FAT__58___Date_resolution_for_mtime_2s--__62___implications.mdwn b/doc/bugs/FAT__58___Date_resolution_for_mtime_2s--__62___implications.mdwn deleted file mode 100644 index d4dcc26e3..000000000 --- a/doc/bugs/FAT__58___Date_resolution_for_mtime_2s--__62___implications.mdwn +++ /dev/null @@ -1,138 +0,0 @@ -The Date resolution of the FAT filesystem is only 2 seconds for the "last modified time." -This leads to the strange behaviour, that after umount and remount of an usb drive (direct mode) git-annex thinks that suddenly approx. 50% of -the files are modified. (after remount the "seconds" appears to be rounded to even values - the inode cache before unmount had 1 second resolution) So git-annex is not real "guilty" but it would be fine to create a "workaround" for this problem... - -Possible the best solution for this is to set even values for the seconds in the filesystem and in annex internal tables direct after the `git annex get`. -Other solution would be to treat differences up to 1s in modification time as unmodified or create an new parameter like rsync's "modify-window" for this. To do an `git annex sync` or `git annex add` is in my opinion not a good option, because one could add so Bad file content by accident... - -Here's an konsole session to show this behaviour: - - $ mount /mnt/transfer/ - $ git clone source/ /mnt/transfer/transfer-repo - - Klone nach '/mnt/transfer/transfer-repo'... - Fertig. - - $ cd /mnt/transfer/transfer-repo/ - $ git annex init "test" - - init test - Detected a filesystem without fifo support. - - Disabling ssh connection caching. - - Detected a crippled filesystem. - - Enabling direct mode. - ok - (Recording state in git...) - - $ git annex group here transfer - - group here (merging origin/git-annex into git-annex...) - (Recording state in git...) - ok - (Recording state in git...) - - $ git annex wanted here standard - - wanted here ok - (Recording state in git...) - - $ git annex get --auto - - get n01.mp3 (from origin...) - SHA256E-s1159018--5674452792970dc03e9ba47d3a8af5ad7c8da6b3ca19e8e64b9a4cf462d4a92d.mp3 - 1159018 100% 82.62MB/s 0:00:00 (xfer#1, to-check=0/1) - - sent 1159308 bytes received 31 bytes 2318678.00 bytes/sec - total size is 1159018 speedup is 1.00 - ok - - get n02.mp3 (from origin...) - SHA256E-s1622113--03998dc10c4839d5ab9aeaceaa63f0363c9d728aaaca2a2707f025c7b9e920a3.mp3 - 1622113 100% 34.45MB/s 0:00:00 (xfer#1, to-check=0/1) - - sent 1622459 bytes received 31 bytes 3244980.00 bytes/sec - total size is 1622113 speedup is 1.00 - ok - - ... - ... - - –--> All 29 files (n01.mp3 to n29.mp3) successfully got - - (Recording state in git...) - - $ git annex status - $ stat * >../stat-before-umount - $ cd / - $ umount /mnt/transfer - $ mount /mnt/transfer - $ cd /mnt/transfer/transfer-repo - $ stat * >../stat-after-remount - $ git annex status - M n05.mp3 - M n10.mp3 - M n11.mp3 - M n13.mp3 - M n16.mp3 - M n17.mp3 - M n20.mp3 - M n22.mp3 - M n23.mp3 - M n24.mp3 - M n26.mp3 - M n27.mp3 - $ diff -u ../stat-before-umount ../stat-after-remount | grep -B8 "+Modifiziert" | grep -E "Datei:|Modifi" - - Datei: „n05.mp3“ - -Modifiziert: 2014-05-03 19:42:39.000000000 +0200 - +Modifiziert: 2014-05-03 19:42:38.000000000 +0200 - - Datei: „n10.mp3“ - -Modifiziert: 2014-05-03 19:43:05.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:04.000000000 +0200 - - Datei: „n11.mp3“ - -Modifiziert: 2014-05-03 19:43:07.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:06.000000000 +0200 - - Datei: „n13.mp3“ - -Modifiziert: 2014-05-03 19:43:15.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:14.000000000 +0200 - - Datei: „n16.mp3“ - -Modifiziert: 2014-05-03 19:43:21.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:20.000000000 +0200 - - Datei: „n17.mp3“ - -Modifiziert: 2014-05-03 19:43:29.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:28.000000000 +0200 - - Datei: „n20.mp3“ - -Modifiziert: 2014-05-03 19:43:53.000000000 +0200 - +Modifiziert: 2014-05-03 19:43:52.000000000 +0200 - - Datei: „n22.mp3“ - -Modifiziert: 2014-05-03 19:44:13.000000000 +0200 - +Modifiziert: 2014-05-03 19:44:12.000000000 +0200 - - Datei: „n23.mp3“ - -Modifiziert: 2014-05-03 19:44:23.000000000 +0200 - +Modifiziert: 2014-05-03 19:44:22.000000000 +0200 - - Datei: „n24.mp3“ - -Modifiziert: 2014-05-03 19:44:31.000000000 +0200 - +Modifiziert: 2014-05-03 19:44:30.000000000 +0200 - - Datei: „n26.mp3“ - -Modifiziert: 2014-05-03 19:44:35.000000000 +0200 - +Modifiziert: 2014-05-03 19:44:34.000000000 +0200 - - Datei: „n27.mp3“ - -Modifiziert: 2014-05-03 19:44:39.000000000 +0200 - +Modifiziert: 2014-05-03 19:44:38.000000000 +0200 - - -> fixed [[done]] --[[Joey]] |