From owner-freebsd-fs@FreeBSD.ORG Tue Oct 16 12:56:27 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EE354572 for ; Tue, 16 Oct 2012 12:56:27 +0000 (UTC) (envelope-from feld@feld.me) Received: from feld.me (unknown [IPv6:2607:f4e0:100:300::2]) by mx1.freebsd.org (Postfix) with ESMTP id AF2A58FC17 for ; Tue, 16 Oct 2012 12:56:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=feld.me; s=blargle; h=In-Reply-To:Message-Id:From:Mime-Version:Date:References:Subject:Cc:To:Content-Type; bh=aZZWUfmHvMauy/QogoK+/6PCmpxF0GeQ4l9P294VnSU=; b=M4hgQxzkg6l2fgOzjyR45LozdPPmbKUUn21cjeH2dJikdbXDExQ0IjjthkbXkqjELYSTxocn6uinw3ibRMeQuSopSCpaX5iniRf/zU7Rq1zyAOTTZRAmBGPs2Od5mgTq; Received: from localhost ([127.0.0.1] helo=mwi1.coffeenet.org) by feld.me with esmtp (Exim 4.80 (FreeBSD)) (envelope-from ) id 1TO6h2-000FHE-5v; Tue, 16 Oct 2012 07:56:25 -0500 Received: from feld@feld.me by mwi1.coffeenet.org (Archiveopteryx 3.1.4) with esmtpa id 1350392174-53137-53136/5/7; Tue, 16 Oct 2012 12:56:14 +0000 Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes To: Dustin Wenz , Olivier Smedts Subject: Re: Imposing ZFS latency limits References: <6116A56E-4565-4485-887E-46E3ED231606@ebureau.com> Date: Tue, 16 Oct 2012 07:56:14 -0500 Mime-Version: 1.0 From: Mark Felder Message-Id: In-Reply-To: User-Agent: Opera Mail/12.10 (FreeBSD) X-SA-Report: ALL_TRUSTED=-1, KHOP_THREADED=-0.5 X-SA-Score: -1.5 Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Oct 2012 12:56:28 -0000 On Tue, 16 Oct 2012 06:25:57 -0500, Olivier Smedts wrote: > > That would be great - no need for TLER drives. But if you want to > "drop" the drive from the bus, that would be a GEOM thing. Don't know > if that's possible to implement. This would be GREATLY appreciated. I've seen this happen on my own ZFS boxes as well as on a custom made SAN. It's painful but easy to detect when you notice the symptoms...