From owner-freebsd-questions@FreeBSD.ORG Thu Feb 9 12:30:34 2006 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 81F7C16A423 for ; Thu, 9 Feb 2006 12:30:34 +0000 (GMT) (envelope-from mark.jacobs@custserv.com) Received: from TMPMX2.timeinc.com (tmpmx2.timeinc.com [64.236.226.18]) by mx1.FreeBSD.org (Postfix) with ESMTP id 249B843DB7 for ; Thu, 9 Feb 2006 12:29:37 +0000 (GMT) (envelope-from mark.jacobs@custserv.com) X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 Content-Class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Thu, 9 Feb 2006 07:29:21 -0500 Message-ID: <7867115D33789747BE4994F8700BB58604084688@tmpmailmb02.enterprise.corpad.timeinc.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: showdown transfering files with scp thread-index: AcYs8VesWQfUK7rLSaiRwZFzhSbVLgAguVUg From: To: X-OriginalArrivalTime: 09 Feb 2006 12:29:21.0351 (UTC) FILETIME=[74133570:01C62D74] Cc: questions@freebsd.org Subject: RE: showdown transfering files with scp X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Feb 2006 12:30:34 -0000 This is a home network. Cable modem to OpenBSD firewall. Firewall to router/hub. Three PC's attached to hub. The transfer was between two of the PC's. Mark Jacobs -----Original Message----- From: Bill Schmitt (SW) [mailto:software@schmittnet.com]=20 Sent: Wednesday, February 08, 2006 3:52 PM To: Jacobs, Mark - Data Center Operations Cc: questions@freebsd.org Subject: Re: showdown transfering files with scp mark.jacobs@custserv.com wrote: >I was using scp to copy several large (300-800mb) each files between two >Freebsd machines. Both are on the same hub, 100MB Ethernet connection. >The source box is FreeBSD 5.4 stable at a late October build date. The >target is running 6.0 stable at a current build date. > >=20 > >The first three files showed a transfer rate of about 3mb/sec and >transfer took about a 5-7 minutes for each file. After the third one >however the transfer rate dropped to 100-200 KB/sec. There was nothing >else going on in the internal network at the time. > >=20 > >Any ideas on what happened? > >=20 > >Mark Jacobs > >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > > > > =20 > I can't be sure if it's the issue, but at one point some individuals on=20 the network where I worked installed hubs of their own (the=20 non-intelligent variety of connection) and it didn't just slow them=20 down, it dragged down the entire network segment. Since hubs are not=20 intelligent, there are an awful lot of collisions and putting a hub=20 downstream from the routers means that all bets are off on performance.=20 Hope that helps.