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Diffstat (limited to 'doc/bugs/Windows_file_timestamp_timezone_madness/comment_2_a6a3871747306913b69abcd73d13305e._comment')
| -rw-r--r-- | doc/bugs/Windows_file_timestamp_timezone_madness/comment_2_a6a3871747306913b69abcd73d13305e._comment | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/doc/bugs/Windows_file_timestamp_timezone_madness/comment_2_a6a3871747306913b69abcd73d13305e._comment b/doc/bugs/Windows_file_timestamp_timezone_madness/comment_2_a6a3871747306913b69abcd73d13305e._comment deleted file mode 100644 index c213aa0a9..000000000 --- a/doc/bugs/Windows_file_timestamp_timezone_madness/comment_2_a6a3871747306913b69abcd73d13305e._comment +++ /dev/null @@ -1,26 +0,0 @@ -[[!comment format=mdwn - username="http://joeyh.name/" - ip="108.236.230.124" - subject="comment 2" - date="2014-06-11T19:51:15Z" - content=""" -Note that multiple time zone changes complicate this. I think that means that the delta can't be simply applied when comparing inode caches. Instead, probably it needs to be applied when generating inode caches. - -A scenario: - -1. Time zone is at +1h when the inode sential is written. -2. Time zone changes to +2h -3. File F is added (with a current timestamp of T) -4. Time zone changes to +5h - -I am a little confused by which way windows moves the timestamps when the time zone changes. Let's assume I might get the sign wrong. - -Let F's timestamp after step 4, F4 = T+-3h. - -Let the delta after step 4, D4 = +-4h -And, let the delta after step 2, D2 = +-1h - -If step 3 writes the current timestamp to the inode cache, then the cache still has T in it after step 4. F4+D4 /= T (T +-3h +-4h /= T). So comparison doesn't work. - -If instead the current delta is applied when generating inode caches (both for storing on disk, and for immediate comparison), then the inode cache will have T+D2 in it. Then after step 4, generating a new inode cache for F will yield F4+D4. So, does F4+D4 == T+D2? T +-3h +-4h == T +-1h YES! -"""]] |