Rsync between HPUX11.11 and Redhat7.3

jw schultz jw at
Wed Feb 26 08:02:18 EST 2003

On Tue, Feb 25, 2003 at 04:57:48PM +0200, Stanton Scott wrote:
> Hi,
> The number of files we are trying to mirror is
> approximately: 100 000 and growing.

That isn't very many.  Your root filesystem probably has
more.  File count is not the problem.

> The version of RSYNC are as follows: 
> - On HPUX   : 2.5.6 (client)
> - On Redhat : 2.5.4 (server)

Upgrade.  Lots of fixes between 2.5.4 and 2.5.6.  Correction
to above: Data volume could be pushing you over the edge
in 2.5.4.

> The kernel version of the Redhat server is:  2.4.18-3
> The amount of physical memory on the Redhat server is: 512m

Should be plenty of memory, especially with only 100,000
files.  And the worst of the swap storms were fixed in

> The rsync server and client do not appear to be under much
> of a load when performing this rsync operation.
> I have tried using rsync without using compression, but
> unfortunaly this did not correct the problem.
> I am incorrect in saying that rsync freezes, I have
> identified it does not actualy freeze it just slows down
> incredibly ( +- 5kb per second transfer speed), it just
> appeared to freeze.
> With a smaler amount of files rsync works perfectly between
> my HP and Linux box.
> Im not sure why rsync slows down to such a degree, do you
> think playing with the socket options could have a
> possitive affect ?


The most likely culprit is the fact that you are down-rev.
Get up to 2.5.6 and if the problem persists we'll revisit

If the problem persists you should characterize file sizes
and identify the largest file size.

	J.W. Schultz            Pegasystems Technologies
	email address:		jw at

		Remember Cernan and Schmitt

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