From owner-freebsd-fs@FreeBSD.ORG Thu Feb 24 20:02:08 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 9DFFF1065670 for ; Thu, 24 Feb 2011 20:02:08 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 2EE6B8FC1B for ; Thu, 24 Feb 2011 20:02:07 +0000 (UTC) Received: by fxm19 with SMTP id 19so1050524fxm.13 for ; Thu, 24 Feb 2011 12:02:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=gxT/EaJTk+wtz7gUX7zCEqv3hoSepyUCRb5P+Zf87tE=; b=fq5JuZdAM04zJ22jZw96dEOE3XSHLagxeIthX3huOp3FASHn4zp8bGhJAtCmgoutn9 0Hk0+AnKzQv02fLbCU/Nbl2wCyx7KkAQ8QbmXvzabI7w8UZFrCQ3yxsM+kyX17aP08gX a7PHQHUkPqMii7r0+QCtNAAKZ65BVlm5em8ek= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=l0hRob9KzWzcGtiI5GnAsdfPM9T6ErrJsSYqzyvMcsJuaemIdY2rSwQOc9bnIpZXR9 8lHUE9S+OIKr1TRUXfrCb5qmaC8If3OnBPVrKXqEvhgTew1RE5N/QjM9oEfjgbMtX3oD kL+0TGVoUHcg67ZB+SyPQzXBtWyAyb9A3kiVY= MIME-Version: 1.0 Received: by 10.223.114.209 with SMTP id f17mr1542679faq.136.1298577627130; Thu, 24 Feb 2011 12:00:27 -0800 (PST) Received: by 10.223.94.67 with HTTP; Thu, 24 Feb 2011 12:00:27 -0800 (PST) In-Reply-To: References: Date: Thu, 24 Feb 2011 14:00:27 -0600 Message-ID: From: Adam Vande More To: Piotr Kucharski Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-fs@freebsd.org Subject: Re: very slow zfs scrub 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: Thu, 24 Feb 2011 20:02:08 -0000 On Thu, Feb 24, 2011 at 1:28 PM, Piotr Kucharski wrote: > > Wow! What does scrub do that it slows ggate drive almost to halt? > > What can I do to fix it? > I think network latency is going to have huge impact on performance here. Have you tried any ggate or nic tuning? Would HAST be an option for you? I think it has more performance thought put into it. -- Adam Vande More