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Re: Performance of 1.7
- From: Christopher Faylor <cgf-use-the-mailinglist-please at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Thu, 8 May 2008 11:23:11 -0400
- Subject: Re: Performance of 1.7
- References: <BAY109-DAV11D7F6C6D8ECC0C913C027CFD00@phx.gbl>
- Reply-to: cygwin at cygwin dot com
On Wed, May 07, 2008 at 10:56:19PM -0600, Rob Bosch wrote:
>I've been testing cygwin 1.7 on Server 2008 with rsync. First, the install
>went flawlessly. I'm just using a standard path of E:\cygwin...no fstab
>Compiling rsync worked without a hitch. The rsync version is 3.02 with the
>preallocate patch applied. The patch takes advantage of the posix_fallocate
>There have been two major improvements I've seen with the 1.7 build on
>- The long file name errors that used to always be a problem are no longer
>there which is great news.
>- The overall I/O performance is much higher. I don't have hard statistics
>but have been watching throughput on the SAN connected to the server. With
>old cygwin and Server 2003 I was lucky to get sustained throughput of
>40M-50M. Now I'm seeing throughput of 100M-120M all the time with bursts
>much higher. It is possible the performance gain is helped by Server 2008
>as I have not attempted to run the old cygwin on 2008 for a true comparison.
>I think a lot of it is also in the cygwin version since I'm sending the
>email to that list. :)
>Sorry I don't have any more hard data as we continue testing 1.7. Thought
>I'd at least let you know some of the nice things I'm seeing.
If you're using pipes in any capacity I would expect that you'd see some
improvement in throughput since I rewrote the I/O handling there to remove
the old head-standing which was necessary for Windows 9x.
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