From owner-freebsd-fs@freebsd.org Mon Oct 2 18:44:50 2017 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 5CB31E246B1 for ; Mon, 2 Oct 2017 18:44:50 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-io0-x231.google.com (mail-io0-x231.google.com [IPv6:2607:f8b0:4001:c06::231]) (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 242F77322E for ; Mon, 2 Oct 2017 18:44:50 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by mail-io0-x231.google.com with SMTP id w94so5561887ioi.7 for ; Mon, 02 Oct 2017 11:44:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=1+daKYhRxeGmlbIrfXype4Y3Oj1rf/okbs8Eq5jC6Uw=; b=g+SJhgKphswz8iafLpUAHddNg2hg9FUJEj8q3lDSvWrUaAF6BPmAjVu/8ehYKgqKQv dwNyME+dwpQa1TfAPs70Bhg9XDx0z7efuF0vobvKN2XMgPXM4WiERe0mkqZFnsIcHwau q/TfF6yV7SrN58Lh3w0Ge/IIhBI+mVUzVrZPiHMW2E7kL2YvBHfFm6Kg6OxDm0o9w8Mf 9z52w2q3+YJpEWsr4l1W+kjJZLMPVO3zhhy6SZ3mpquCoQ4fE/BloZVOiv08Z/Ov8LR1 wC2BqSHQRlrZDTcWuGWJerz6MRp7iK2pWDHf0IgHbco1nWH5YzGZnZh0CawdONscCgQW l2UA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=1+daKYhRxeGmlbIrfXype4Y3Oj1rf/okbs8Eq5jC6Uw=; b=s/yXzVxoOLgx79X7daK3aFBKWtaBCWbgyAPEStwNXbWXbAU106ZTLY1TMF0fBBc4m6 7WErD0DKWdARA4uj7gdGPhg6IXqGXYQtL3PUgC272rXt/HSvv0c1mNgttoZTIzXWc/AT 4pRaO9XTS1mrtPcvK7PNG5fP8flzLKm5SnO/VxsdSzgQQNWLPE4b9qB3819ZL4jCEdC6 tJ+lx1fTgTZMncc7ZFJMc/ApJlQ8ls550UrvD6oVjOae5rm5PgbDL5Ktg15asf8rHVrZ j4QcK2liY2qk09nvh1HoWkk+hCj2oywDW/OLcgnvWVQYRBWBllsEMCCuIQSC9gQ92oVb rOGA== X-Gm-Message-State: AMCzsaVVpOImtq5lt9KHr7RLkv7BV5Uw0JOw99vVmRZlIJT6LlG3QuuX H8SrEgi5OlfvJjdcElOni+7/6/PHOcAnYhrBLP1+/w== X-Google-Smtp-Source: AOwi7QBNR4qOnfih2m2y/YoONGkzOj11uPgOWFeXRt7W+u19//bPXqO1S7YwV+LIHAf/F4nbQnzTExUayZGvYeqIA9o= X-Received: by 10.107.69.2 with SMTP id s2mr79265ioa.16.1506969889455; Mon, 02 Oct 2017 11:44:49 -0700 (PDT) MIME-Version: 1.0 Received: by 10.2.145.141 with HTTP; Mon, 2 Oct 2017 11:44:48 -0700 (PDT) In-Reply-To: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> References: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> From: Adam Vande More Date: Mon, 2 Oct 2017 13:44:48 -0500 Message-ID: Subject: Re: ZFS stalled after some mirror disks were lost To: Ben RUBSON Cc: Freebsd fs Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 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: Mon, 02 Oct 2017 18:44:50 -0000 On Mon, Oct 2, 2017 at 1:12 PM, Ben RUBSON wrote: > Hi, > > On a FreeBSD 11 server, the following online/healthy zpool : > > home > mirror-0 > label/local1 > label/local2 > label/iscsi1 > label/iscsi2 > mirror-1 > label/local3 > label/local4 > label/iscsi3 > label/iscsi4 > cache > label/local5 > label/local6 > > A sustained read throughput of 180 MB/s, 45 MB/s on each iscsi disk > according to "zpool iostat", nothing on local disks (strange but I > noticed that IOs always prefer iscsi disks to local disks). > No write IOs. > > Let's disconnect all iSCSI disks : > iscsictl -Ra > > Expected behavior : > IO activity flawlessly continue on local disks. > Perhaps I'm misunderstanding your setup, but my expected behavior would be exactly what you see. I think you'd need something more along the lines of: home mirror label/local1 label/iscsi1 mirror label/local2 label/iscsi2 etc... -- Adam