From owner-freebsd-performance@FreeBSD.ORG Mon Jul 19 12:35:03 2010 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B86A11065687 for ; Mon, 19 Jul 2010 12:35:03 +0000 (UTC) (envelope-from chris.compagnon@free.fr) Received: from smtpfb1-g21.free.fr (smtpfb1-g21.free.fr [212.27.42.9]) by mx1.freebsd.org (Postfix) with ESMTP id 03F038FC13 for ; Mon, 19 Jul 2010 12:35:01 +0000 (UTC) Received: from smtp5-g21.free.fr (smtp5-g21.free.fr [212.27.42.5]) by smtpfb1-g21.free.fr (Postfix) with ESMTP id 748272D126 for ; Mon, 19 Jul 2010 14:15:43 +0200 (CEST) Received: from spooler8-g27.priv.proxad.net (unknown [172.20.243.233]) by smtp5-g21.free.fr (Postfix) with ESMTP id CB3F0D48132 for ; Mon, 19 Jul 2010 14:15:36 +0200 (CEST) Date: Mon, 19 Jul 2010 14:15:35 +0200 (CEST) From: chris.compagnon@free.fr To: freebsd-performance@freebsd.org Message-ID: <174253078.4054151279541735578.JavaMail.root@spooler8-g27.priv.proxad.net> In-Reply-To: <1378275745.4053601279541488405.JavaMail.root@spooler8-g27.priv.proxad.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [unknown,171.18.2.109] X-Mailer: Zimbra 5.0 (ZimbraWebClient - FF3.0 (Win)/5.0.15_GA_2815.UBUNTU8_64) X-Authenticated-User: chris.compagnon@free.fr Subject: FreeBSD 8.0 + ZFS : erratic network performances X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jul 2010 12:35:03 -0000 Hello ! I have installed a fresh freeBSD 8.0 (with kernel building, etc.) and activated ZFS. There are 3 SATA disks for 1 raidz1 pool (through Promise TX4 contoler card). and 1 IDE disk for cache. (I remove the cache disk for testing --> Persitant problem) With 1 GB or RAM and default parameters : During transfering data to the ZFS server (through samba or FTP), the data are temporaly stored on cache disk, so transfered on pool. when the data pass from cache to pool, all transfers halt : 12 seconds : transfer 2/3 second : halt 12 seconds : transfer. ... How obtain continuous transfers ? Thanks. Chris.