From owner-freebsd-fs@freebsd.org Tue Apr 24 09:46:30 2018 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7A49EFC1BAE for ; Tue, 24 Apr 2018 09:46:30 +0000 (UTC) (envelope-from zmey20000@yahoo.com) Received: from sonic307-37.consmr.mail.ne1.yahoo.com (sonic307-37.consmr.mail.ne1.yahoo.com [66.163.190.60]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 14BAB737B3 for ; Tue, 24 Apr 2018 09:46:29 +0000 (UTC) (envelope-from zmey20000@yahoo.com) X-YMail-OSG: jf5NAQYVM1nGkUh2DXAmZdR0If.LRhhyykpmCJdKiYwdUXLcji.U9DG0xdSMVFo AtRX6RVSg0X1TKWa90Lf8FL0IhpYwQNlhmBqI6LCZy7zbcwyRnJsCSOcnEtZqhAiJGmSEqh1BeyK IHdpG08BD0xnr3XCjTNPdMYvv_IgNU1vqsRwBNtaFKYMxhGHkQKWm8uc6q_FDxAEI3Xu8x3xGf2y 4_4oquI7now5_e5TT2QtVZTRf3yTgSICmmJ4BMj73PS5XJ0HyNzvOmoLy5VoW_J6xy0K.iABUPOT S.EpQKSPp.zNvNP2phf4YECASMmY2lG.KNEyhDwxVrQa0svrGV9ESAkqC6PH4eQXw2rui_ShaO3G bJE.TLir1tnANTBokt0XzzUQftSOY5Es_ckcXeA.mlrVXU0fs7jrsrlW8tTUfmMgvMffCh0Fkeaf f2.ndymv4KOu1mPl5mDr.mAmX9Jc3A8wgnxRHqodji7DF5Xs.3ldfrn_XRQ5mI07qhatwStNr2jS extfTnpYaOeVGBxkgZv8m5BQHACS2rJFkVYzwWjzElDDouo32Q3lxxqfuJv3ayxlCR38KinzprWB 2mohhPzKVRvmB4Sz0QevCSw_Y Received: from sonic.gate.mail.ne1.yahoo.com by sonic307.consmr.mail.ne1.yahoo.com with HTTP; Tue, 24 Apr 2018 09:46:23 +0000 Received: from athe-hcsd-peer.customers.otenet.gr (EHLO [192.168.130.11]) ([195.167.103.234]) by smtp410.mail.ne1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID 22f7da5d83d72fd219e5448977ac8fb2; Tue, 24 Apr 2018 09:32:16 +0000 (UTC) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (1.0) Subject: Re: ctl_isc_lun_sync: Received conflicting HA LUN From: Mikhail Zakharov X-Mailer: iPad Mail (15E216) In-Reply-To: <1524550160.1130.6.camel@inparadise.se> Date: Tue, 24 Apr 2018 12:32:12 +0300 Cc: "freebsd-fs@freebsd.org" , Mike Tancsa Content-Transfer-Encoding: quoted-printable Message-Id: <615DFFBB-239A-4350-B961-FD10D0C9A8DD@yahoo.com> References: <4cb4aa83-bd49-0c20-4e41-c11c682b0570@sentex.net> <1e1e7cd5-0797-c168-fbce-a36edc6a432e@sentex.net> <1524550160.1130.6.camel@inparadise.se> To: karli@inparadise.se X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Apr 2018 09:46:30 -0000 Hi Karli, Thank you, I=E2=80=99m just exploring the storage abilities of my preferred O= S - FreeBSD.=20 Three nodes are preferable to choose the quorum for sure, but my idea was no= t to establish contacts between nodes. Instead of it, BQ uses a small partit= ion for the =E2=80=9Cquorum=E2=80=9D on the same space where data volume is l= ocated. And if a node looses access to the quorum it means, it looses access= to the data volume too. Now, BQ runs on both nodes and both BQ instances wr= ite stamps to the quorum partition. If for any reason BQ on one node detects= , the other node stops updating it=E2=80=99s stamps, it performs failover pr= ocedure. It=E2=80=99s quite a questionable, rude way, I can agree, and that=E2= =80=99s why I always write a warning to use the BeaST for testing only purpo= ses.=20 Best regards, Mike > 24 =D0=B0=D0=BF=D1=80. 2018 =D0=B3., =D0=B2 9:09, Karli Sj=C3=B6berg =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0): >=20 >> On Mon, 2018-04-23 at 13:11 -0400, Mike Tancsa wrote: >>> On 4/23/2018 12:59 PM, Mikhail Zakharov wrote: >>>=20 >>> Hello Mike, >>>=20 >>> Thank you for your interest to my paper. I appreciate it very much! >>> Your error may be a consequence of the initial HA misconfiguration. >>> What is in your /boot/loader.conf? Although the described config is >>> quite simple, I can recheck the instruction in my paper in a couple >>> of weeks only, unfortunately I=E2=80=99m on vacation right now. >=20 > [snip] >=20 > I read your articles on CTL HA, BQ and BeaST, and just wanted to say > they are amazing, good job! >=20 > One thing I=C2=B4m wondering about though is if you can claim HA with just= > two nodes, usually you need at least three, where the third is a tie- > breaker. Otherwise with your current setup, both systems may loose > contact with each other while both still being powered on, leading to > potential split brain situations. What are your thoughts about that? >=20 > /K