From owner-freebsd-fs@freebsd.org Wed Dec 21 07:33:19 2016 Return-Path: Delivered-To: freebsd-fs@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 2242BC8AE3A; Wed, 21 Dec 2016 07:33:19 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wm0-x242.google.com (mail-wm0-x242.google.com [IPv6:2a00:1450:400c:c09::242]) (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 9E954188B; Wed, 21 Dec 2016 07:33:18 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wm0-x242.google.com with SMTP id g23so28835578wme.1; Tue, 20 Dec 2016 23:33:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=K2uFvCdQLAozHJBveM83HGVGsknGw/9aVU0V5mFw4Fg=; b=kg6f1U9YjVjVrXgOj9Zv9bxkct1bzGmkBjEp2y4K52lml9Bkoluvxjzf78IgfWC6Dn n/syUqlFOcO1ltwfct+kWde2QU1kAPb9pIeOyxoWnTHTsV4IGxGErNtiAGIabuMdhnPy rKH6oHfi5/OAN2EP2x5Qzh2I7ikuOPTQygf42XH867WgIBcOeaa1CM5QR6qwnZkQgGXF iALJzgKA0c+ohm3hABHgcQj+G938WX2Nc5VDV/iUx28URS4A9bzWlNY2v7IJ1xvEdUsJ kOR6s3r2iNKFJG1chh/G0EbSLcotmp9DfVr1y3qjwhwf4GBBoTcUCfwnpYehRytReTRJ IZTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=K2uFvCdQLAozHJBveM83HGVGsknGw/9aVU0V5mFw4Fg=; b=YnMq9NYWUGYHHx4BfvQzjtU121u5X/v709/WKlaBtAUZ/rNMeAgGS8zIpj4/6bLsvM t927Rl/FHh6G0oKWMnNfnFwmefOCS415eKa0K7ZSgkE5ik679EIvXvx9U0ZmI+l1pcWH pxJOIZJO7sGsY1B+4qsqfWgM3PAe1l188/Qgp86qUjeS+onMsOlFnTTwY122jQSKXKOc YPJngAu04lwQ8PZIZy/yySCHHSb0Yt2glWinQ+WAcHQTQphIH0GRmgH7pWkir/b1empT kDw6cJG3Z1H1tUmAwBLZovx826p4dOfOakt8efJuNZzqPAQucyBqJIm5daDd79a5GVOY e4IQ== X-Gm-Message-State: AIkVDXLooLk8t7w73XzJbtpmnjaOe5TQP/oFR+D62yPQT4lCL99gi1TKBkejTHlsqwzELg== X-Received: by 10.28.169.74 with SMTP id s71mr5408777wme.1.1482305596948; Tue, 20 Dec 2016 23:33:16 -0800 (PST) Received: from ben.home (LFbn-1-7159-4.w90-116.abo.wanadoo.fr. [90.116.90.4]) by smtp.gmail.com with ESMTPSA id x188sm25622937wmx.4.2016.12.20.23.33.16 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 20 Dec 2016 23:33:16 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Subject: Re: NFS server hang with backing store on ZFS and quota nearly exhausted From: Ben RUBSON In-Reply-To: <22618.8208.273426.702678@hergotha.csail.mit.edu> Date: Wed, 21 Dec 2016 08:33:17 +0100 Cc: freebsd-stable@freebsd.org Content-Transfer-Encoding: 7bit Message-Id: References: <22618.8208.273426.702678@hergotha.csail.mit.edu> To: freebsd-fs X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Dec 2016 07:33:19 -0000 > On 21 Dec 2016, at 07:24, Garrett Wollman wrote: > > I don't know the ZFS code well enough to understand what running out > of quota has to do with this situation (you'd think it would just > return immediately with [EDQUOT]) but perhaps it matters that the > clients are not well-behaved and that the filesystem is often almost > at quota but not quite there yet. Hi Garrett, ZFS is slow when your are playing around the quota limit, due to how quota are implemented. See this thread : https://lists.freebsd.org/pipermail/freebsd-fs/2016-September/023874.html Ben