[Bug 10322] Slow Performance over Network rsync

samba-bugs at samba.org samba-bugs at samba.org
Mon Dec 23 11:46:31 MST 2013


Wayne Davison <wayned at samba.org> changed:

           What    |Removed                     |Added
             Status|NEW                         |ASSIGNED

--- Comment #4 from Wayne Davison <wayned at samba.org> 2013-12-23 18:46:31 UTC ---
If 3.0.8 is that much faster, I'd imagine that it is due to how long ago it was
complied because there isn't that much different between 3.0.8 and 3.0.9 (just
a few bug fixes).

I was doing some copying under windows recently, and I saw some weird things: I
ran one local-disk to 2nd-local-disk copy and was only getting about 2MB/sec. 
I started another, and it too was getting the exact same speed *without*
affecting the first copy.  I added 2 more with exactly the same results.  Then,
something really interesting happened:  2 of the copies were still going when I
started up a disk utility tool to look at the partitioning, and both of the
already-running rsyncs started pounding the disks, with their throughput going
up by an order of magnitude or so (each).  This makes me think that there is
some kind of a per-process limit that is being imposed, and the disk utility
somehow turned it off.

Perhaps 3.0.8 was compiled with an older cygwin that does not obey this
per-process limit?

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