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Re: Cygwin Rsync/SSH performance issue
- From: Christopher Faylor <cgf-use-the-mailinglist-please at cygwin dot com>
- To: cygwin-developers at cygwin dot com
- Date: Tue, 16 Feb 2010 11:08:31 -0500
- Subject: Re: Cygwin Rsync/SSH performance issue
- References: <A0A2412A6029457CA01C946BC04A46D8@Nemo>
- Reply-to: cygwin-developers at cygwin dot com
On Tue, Feb 16, 2010 at 04:45:38PM +0100, Jan Alphenaar wrote:
>I did some more testing on this and figured out that rsync/ssh is only
>taking the full cpu if the bandwidth allocated to the session exceeds the
>true bandwidth available on the link.
>For example, if the uplink is 128KB/s and I pass in the --bwlimit=24
>parameter the cpu is around 0%. Even --bw-limit=126 does not take 100% cpu,
>but --bwlimit=132 does.
>Would this be because of packet loss on the link and packets have to be
>retransmitted ? I will do a quick test tonight with rsync/ssh between two
>linux boxes, see what that gives me.
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