From owner-freebsd-fs@FreeBSD.ORG Wed Oct 12 19:56:03 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DFD3D1065670 for ; Wed, 12 Oct 2011 19:56:03 +0000 (UTC) (envelope-from thomas.e.zander@googlemail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id 737CA8FC13 for ; Wed, 12 Oct 2011 19:56:03 +0000 (UTC) Received: by eyd10 with SMTP id 10so1458855eyd.13 for ; Wed, 12 Oct 2011 12:56:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=GVau/7W6jAmoe8KkOdqenRl1ki4NeWKysuvnscRhRMs=; b=YN72HGO+P0r4E/jbd1bYPjm87XAjTABLP9DJuPxawQ0G3YPsbbFnqh8XLmePAGwN1Y DPMuwICzuCS4rwCX1j8hBakBvbHJ7D7uQOPOsMe/Eu8CMXA4GTjbEBvBKTCfpDMMdwPJ SVcKsYg2sBABGjiK3XStY4Nu3Ktd6w+L2zFas= MIME-Version: 1.0 Received: by 10.14.17.226 with SMTP id j74mr49104eej.69.1318447697309; Wed, 12 Oct 2011 12:28:17 -0700 (PDT) Received: by 10.14.37.69 with HTTP; Wed, 12 Oct 2011 12:28:17 -0700 (PDT) In-Reply-To: <20111012165126.GA26562@icarus.home.lan> References: <20111012165126.GA26562@icarus.home.lan> Date: Wed, 12 Oct 2011 21:28:17 +0200 Message-ID: From: Thomas Zander To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: Re: ZFS/compression/performance X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Oct 2011 19:56:04 -0000 On Wed, Oct 12, 2011 at 18:51, Jeremy Chadwick wrote: > That might be the case on OpenSolaris but the performance hit on > FreeBSD RELENG_8 is very high -- enough that enabling compression (using > the defaults) causes stalls when I/O occurs (easily noticeable across > SSH; characters are delayed/stalled (not buffered)), etc.. Has this improved considerably in RELENG_9? I couldn't try 9 yet. Riggs