Slowdown when copying large files (PR#8617)

Jim Watt jimw at pe-nelson.com
Tue Jul 28 01:27:38 GMT 1998


--On Tuesday, July 28, 1998, 3:48 AM +1000 "Jeremy Allison" 
  <jallison at cthulhu.engr.sgi.com> wrote: 


} >peloy at ven.ra.rockwell.com wrote:
} > 
} > Andrew, but if it is Windows 98 the one that is screwing things up,
} > wouldn't this slowdown be seen when the server is something else, like
} > Windows 95/NT, etc.?
} > 

} Apparently not - according to one of JohnT's technical
} contacts at MS - doing a fsync on a file in NT isn't the
} same as a UNIX fsync, but only *schedules the write to
} be done* !

So it's more like the way NFS treats syncs.  Eventually... :-)

} I will add this option before 1.9.18p9 ships - the only
} question is - should it be on or off by default ?

Sounds to me like there are two issues.  One, to make the
behavior consistent with NT's, perhaps only flush the stream.
But then, what if somebody _really_ wanted a sync done when
SMB says to do one?  Is that two options?

Jim
--
Jim Watt                                 jimw at PE-Nelson.COM
Perkin-Elmer Corporation                 Voice (desk): +1 408 577 2228
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