Re: [Bug-tar] stat() on btrfs reports the st_blocks with delay (data loss in archivers)

[Joerg Schilling]

Andreas Dilger <address@hidden> wrote:

> I think in addition to fixing btrfs (because it needs to work with existing
> tar/rsync/etc. tools) it makes sense to *also* fix the heuristics of tar
> to handle this situation more robustly.  One option is if st_blocks == 0 then
> tar should also check if st_mtime is less than 60s in the past, and if yes
> then it should call fsync() on the file to flush any unwritten data to disk,
> or assume the file is not sparse and read the whole file, so that it doesn't
> incorrectly assume that the file is sparse and skip archiving the file data.

A broken filesystem is a broken filesystem.

If you try to change gtar to work around a specific problem, it may fail in 
other situations.

Jörg

-- 
 EMail:address@hidden                    (home) Jörg Schilling D-13353 Berlin
       address@hidden (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.org/private/ 
http://sourceforge.net/projects/schilytools/files/'