From owner-freebsd-stable@freebsd.org Tue Nov 24 15:26:10 2015 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7FB44A3612C for ; Tue, 24 Nov 2015 15:26:10 +0000 (UTC) (envelope-from albert@acervin.com) Received: from mail-wm0-x233.google.com (mail-wm0-x233.google.com [IPv6:2a00:1450:400c:c09::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1BA171923 for ; Tue, 24 Nov 2015 15:26:09 +0000 (UTC) (envelope-from albert@acervin.com) Received: by wmec201 with SMTP id c201so31588948wme.1 for ; Tue, 24 Nov 2015 07:26:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acervin-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=WyvGac9gy5va/3TfGjg/6Kb8tPaU4uqAvj52Jllon5g=; b=wKDPxjjTn4J4JQLMRgl9YifsBGkCw0Jy3Jo9yXFN14TofDsoI0CetCkJZcDXQ2O7xU 7naxtlCrGmCCoLzZGm+M/jnFvBu2n5joZfNGK+rwGTuX85sJvm43kEU3j4+MdRgyKZ98 KfxxuN3M/Npz4clHbqIvNsIk6z/LOBp2CZXzGEs2qp1jDKVp3Lt53pxvEs4Qysf1fOpG 3QBXn6Wp211b1yRCddp+t0B/fNxZvIFr8QvsKcHA1z2D5nw3WiaYY9Cte0ULejbyoBg1 gNgzj9hG3rJXl5XMWOGRa1+7rcW9FBRcQ3WjMmAnvztPiHQO0NsOjU/OD2DVDGTxLC42 nXrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=WyvGac9gy5va/3TfGjg/6Kb8tPaU4uqAvj52Jllon5g=; b=g6jQkWIRgd4ua1pnMTNFN5f0rBExwZs7i+RqG5idyrVNs+yW8Jy+2+HgzEJTNNcCre zBxhwyjVB4jngw5OmH6nJOnTHHrPhoI0k+l9y8gKojGj65z+a774SOua6CKG3/gL+MLQ 0ArlydeDzOGuy7md7CmJKIRQH42UElEIEvCMTuYIioBQWLKbd8zimr9We2suihltuv6j /HMX0YNge8jAmIkTRwS/EYMlq5GoVto3vNUq+j4hWZ1ym3rH9KFO8MFUSvl2lLVW7fzL O8w6RyGlyx8t1YfxKhVbtIj9dwfnKY5eUGRC0hFVRfW2VNWgH5f2eOhBEnD1mrCxfER0 svqA== X-Gm-Message-State: ALoCoQlaqMP3EJTja1lwMrVlB27cH8ph3dNowDljlKDe6ckAzvktB+9HYWIBZMhENL4It+6DGsbc MIME-Version: 1.0 X-Received: by 10.28.210.74 with SMTP id j71mr24789087wmg.96.1448378768089; Tue, 24 Nov 2015 07:26:08 -0800 (PST) Received: by 10.28.195.195 with HTTP; Tue, 24 Nov 2015 07:26:08 -0800 (PST) X-Originating-IP: [80.239.191.4] In-Reply-To: References: Date: Tue, 24 Nov 2015 16:26:08 +0100 Message-ID: Subject: Re: ZFS - poor performance with "large" directories From: Albert Cervin To: Adam Vande More Cc: "freebsd-stable@freebsd.org" Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Nov 2015 15:26:10 -0000 Thanks! "I should hope not. ext4 vs zfs comparison isn't fair for either." I do realize that comparing ext4 and ZFS is not really giving anything but it tells us one thing, ext4 would work whereas ZFS would not for our use case, which was unexpected, at least to me. vfs.zfs.txg.timeout is already verified to be 5 (the default). I have also turned off atime and vfs.zfs.arc_meta_limit is 1287906304. "Do you have any memory pressures on your server ? Have a look at this thread" The server has 4 cores and 8Gb of memory and there is no memory pressure on the server. Thanks, will look at the thread! The setup is _really_ simple with just a single pool and no datasets. Any more ideas? Cheers, Albert