From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 128181 invoked by alias); 26 Oct 2015 10:08:00 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 128169 invoked by uid 89); 26 Oct 2015 10:08:00 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-4.1 required=5.0 tests=AWL,BAYES_50,KAM_LAZY_DOMAIN_SECURITY autolearn=no version=3.3.2 X-HELO: calimero.vinschen.de Received: from aquarius.hirmke.de (HELO calimero.vinschen.de) (217.91.18.234) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 26 Oct 2015 10:07:58 +0000 Received: by calimero.vinschen.de (Postfix, from userid 500) id 14EAFA80613; Mon, 26 Oct 2015 11:07:56 +0100 (CET) Date: Mon, 26 Oct 2015 11:13:00 -0000 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.3.0-0.4 Message-ID: <20151026100756.GC31990@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="V88s5gaDVPzZ0KCq" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-SW-Source: 2015-10/txt/msg00448.txt.bz2 --V88s5gaDVPzZ0KCq Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-length: 1671 On Oct 23 14:01, Achim Gratz wrote: > Corinna Vinschen cygwin.com> writes: > > There's, as usual, a downside: AuthZ leans a bit to the slow side. >=20 > It's not too bad, as long as your network connection is fast (and fast me= ans > short roundtrip time for an AD query). If I take each page fault as > reported by time as a proxy for an AD access, then it needs about three > times more roundtrips to the AD. >=20 > On a server with almost perfect connectivity to the AD that increases the > wall-time of listing a very large directory with directories/files from m= any > users (about a quarter of all users in the AD, and not all from the local > domain) from 8 to 10 minutes. The CPU time as well as the network traffic > is neglible in both cases. >=20 > On my local laptop things look a bit different, a small ~5% subset of the > test above goes from 20s to 200s and a different larger ~10% subset from = 50s > to 500s. Erm, really? I tested this locally with a directory with hundreds of files, each of which belonged to another user or group, and that resulted in a 25% slowdown. Not 1000%. Oh boy. > While that hurts, the more usual case with many files from the > same user doesn't feel any slower at the moment. The access through VPN > will be interesting, though... Did you try this in the meantime? Given the above result, I'm wondering if we can afford using AuthZ at all. OTOH I don't see any other way to get the correct POSIX permissions from a non-Cygwin ACL :( Corinna --=20 Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat --V88s5gaDVPzZ0KCq Content-Type: application/pgp-signature Content-length: 819 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWLft7AAoJEPU2Bp2uRE+gzmkP/iH3Odh+aAKSqPuE7gotm+zX Gowr0LbD6DHYxonGPGex+4NUu+z6LiscTm8eVMNJA9G+Myn4I2Vwza9i5uIb78yN 0fy1GAblD6PvhsnM8pnk8MezTpxcCdkaIkbxxYI4p/g7MMP3oCz/XTL91T+YY0rm BDr86Vfm5CJOUm/lgD+MmQm842FI/GzQ7evT6vc2poF3B6U8EbYajJCKpoUkxNxs qLhTK/Xq9PbWsS3wdOTwjIysv6wAm11LZFQaeBMRioTswh/wrfvNvK/nbdGJLcgf i8U+bULXTDCIJj7490eLWPdsDkte2ITRil7gbme3epGWlDzmTOreAbiCipjoYewl ZMAbe2dyQmGzLjIM9hODoBtjcNiOahQJBTlfh70CAl8QHxU7EjKQoMLoEzhWZq/X OdDkKlabYyxWeHRtI6Pk+ivvPzqhycsOzBObYqndS4HCLxiVqH4/7rSbkEWzLZ6c DcMNWZywYqWx6DgfBdobhbudy1RbYBVzmt8tU5rBkdEZICiAB/4//XQEElO5hWVJ /AzqP2PLCKK1D9mis9qKNbzdS2lIcTSpF8tUek82mOHp5OT/bH9v7DpZf918Uxbm 5qsm0MMWPZ6wvrDyIL6uC63Qaz0aqoB8pgJzXaazke828XURCGD1dnIWg5LYRQng XuGaCEGSnqYAuCcFbW00 =8+oO -----END PGP SIGNATURE----- --V88s5gaDVPzZ0KCq--