X-Spam-Check-By: sourceware.org
Message-ID: <00df01c66ad3$e8c9a290$b3db87d4@multiplay.co.uk>
From: "Steven Hartland" <killing AT multiplay DOT co DOT uk>
To: <cygwin AT cygwin DOT com>
References: <01cc01c66968$50acb950$b5db87d4 AT multiplay DOT co DOT uk> <e2okqi$sf9$1 AT sea DOT gmane DOT org> <20060427081642 DOT GA11497 AT calimero DOT vinschen DOT de> <44508D05 DOT 307 AT baltech DOT de> <20060427165032 DOT GA28583 AT calimero DOT vinschen DOT de> <003701c66a2a$2f30b610$b3db87d4 AT multiplay DOT co DOT uk> <20060427184610 DOT GA8203 AT trixie DOT casa DOT cgf DOT cx> <004901c66a2c$ab0d03e0$b3db87d4 AT multiplay DOT co DOT uk> <20060427190910 DOT GB8203 AT trixie DOT casa DOT cgf DOT cx> <007901c66a2f$03c81810$b3db87d4 AT multiplay DOT co DOT uk> <20060428082456 DOT GJ28583 AT calimero DOT vinschen DOT de>
Subject: Re: rsync over ssh hang issue understood
Date: Fri, 28 Apr 2006 15:56:15 +0100
MIME-Version: 1.0
Content-Type: text/plain; 	format=flowed; 	charset="iso-8859-1"; 	reply-type=original
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook Express 6.00.2900.2869
X-Spam-Processed: multiplay.co.uk, Fri, 28 Apr 2006 15:56:27 +0100 	(not processed: message from valid local sender)
X-MDRemoteIP: 212.135.219.179
X-Return-Path: killing AT multiplay DOT co DOT uk
X-MDaemon-Deliver-To: cygwin AT cygwin DOT com
X-MDAV-Processed: multiplay.co.uk, Fri, 28 Apr 2006 15:56:29 +0100
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Corinna Vinschen wrote:
> It works fine for me with the latest snapshot.  I tried Peter's
> example with 1000 files and rsync over ssh works like a charm for me.
> Sigh. 
> 
> This is really a tricky problem.  What I could do to circumvent this
> at least for connections over ssh is to upload an OpenSSH test version
> which uses socketpairs instead of pipes for the local connection to
> the applications.  This avoids using pipes which are the culprit here,
> apparently.    I would mark it as experimental version, but actually
> the only difference would be that it would be a few per cent slower
> than the version using pipes.  And that it probably doesn't hang.
> 
> Is there interest in such a version?

Good news this does fix the issue. I've just successfully done
an rsync of ~1G ( 1700 files ) with no problem at all.

Also note that due to the existing performance issues in ssh ( I've
still not had chance to dig more about that sorry ) there is NO
noticable slowdown when comparing this version to the baseline
version of openssh.

All in all this version is a massive improvement which is fantastic
news!!!

Many thanks Corinna.

    Steve


================================================
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. 

In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137
or return the E.mail to postmaster AT multiplay DOT co DOT uk.


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/