On 09/16/2010 01:21 PM, JD wrote: > > > On 09/16/2010 09:42 AM, Sameer Naik wrote: >> Thanks i will try it out. >> >> On Thu, Sep 16, 2010 at 9:59 PM, JD<jd1...@gmail.com> wrote: >>> >>> On 09/16/2010 03:00 AM, Sameer Naik wrote: >>>> Please find attached. >>>> P.S. I have added the fflush () call before the fsync () call. >>>> >>>> Regards >>>> ~Sameer >>> Well, as I already communicated with Pierre, the man page for fsync >>> says: >>> >>> Calling fsync() does not necessarily ensure that the entry in >>> the >>> directory containing the file has also reached disk. For >>> that, an >>> explicit fsync() on a file descriptor for the directory is also >>> needed. >>> >>> So, when creating a new file, it is not sufficient to flush and >>> fsync the >>> file descriptor. >>> You also need to have opened the containing directory and fsync'ed the >>> directory >>> file descriptor immediately after creating the file. flushing and >>> sync'ing >>> the file >>> comes later when you are done with writing to it. >>> >>> Cheers, >>> >>> JD >>> > > Remember that a directory can only be opened by > DIR *opendir(const char *name); > DIR *fdopendir(int fd); > > Problem is, how can you fsync a dir if you cannot open it > with the open(2) system call? > fsync(2) needs a file descriptor. > DIR * is not a file descriptor. > > And yet, the man page for fsync says: > > Calling fsync() does not necessarily ensure that the > entry in the > directory containing the file has also reached disk. For > that an > explicit fsync() on a file descriptor for the directory is also > needed. > > Maybe someone can clear this up a bit? > > It seems this issue was also discussed in this blog:
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