Changes between Version 23 and Version 24 of SftpFrontend


Ignore:
Timestamp:
2010-06-09T23:05:32Z (14 years ago)
Author:
davidsarah
Comment:

be even more precise about concurrent writes

Legend:

Unmodified
Added
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Modified

  • SftpFrontend

    v23 v24  
    2525Some applications may make assumptions that are incompatible with Tahoe. For example, 'flushing' a file does not guarantee that written data is reflected in the Tahoe filesystem, so opening the same file via another handle and attempting to read that data before the original handle is closed will not work.
    2626
    27 If a file is written via two handles concurrently, the contents visible at any point in time will be the data written via one handle or the other, not an interleaving as would be the case for a POSIX filesystem. Also, the contents read via any handle will be a snapshot at about the time of the open. These differences from the POSIX semantics are arguably improvements, but in principle they could confuse some applications.
     27If a file is written via two handles concurrently, the contents visible at any point in time will be the data written via one handle or the other (or the previous contents), not an interleaving as would be the case for a POSIX filesystem. Also, the contents read via any handle will be a snapshot at about the time of the open. These differences from the POSIX semantics are arguably improvements, but in principle they could confuse some applications.
    2828
    2929The MacFUSE version of sshfs stores "extended attributes" in files with names starting with "{{{._}}}". For example the attributes for "{{{foo.txt}}}" would be stored in a file called "{{{._foo.txt}}}". Since some Mac OS X applications may depend on these attributes (especially for their own file formats), if you need to copy or move the original file then you should copy or move the attribute file along with it. The OS X {{{cp}}} and {{{mv}}} commands will do this by default; operations using the Tahoe WUI or CLI will not (unless you are moving all files in a directory). Note that filenames beginning with "{{{.}}}" are not listed by default by {{{ls}}}.