From owner-freebsd-fs@FreeBSD.ORG Wed Apr 10 07:38:44 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 70F42985 for ; Wed, 10 Apr 2013 07:38:44 +0000 (UTC) (envelope-from joar.jegleim@gmail.com) Received: from mail-wg0-f45.google.com (mail-wg0-f45.google.com [74.125.82.45]) by mx1.freebsd.org (Postfix) with ESMTP id 0FCA99B3 for ; Wed, 10 Apr 2013 07:38:43 +0000 (UTC) Received: by mail-wg0-f45.google.com with SMTP id l18so143134wgh.12 for ; Wed, 10 Apr 2013 00:38:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; bh=g8QAZEFKaNQAClV/1J8O64T2CWgGgHwJ3j5OBTDHiYw=; b=huinxhB7yHNtF519s3dFh0pIfa4vRNkcAHT0tbupbl20fFgupKW00XOMzJ2/jdD4qC hHeQALHepqMLyBPZhlidXV6UcKwmtgX4BiSL9OKh5OiH2nim9xGny0PKChAN0qaZfloD dJVl8tOZ2iJ5zx8QNLyH1VpXftbIJz8PyhmYerkwHMvDUcISXXxeH96QcwqhV95+oOkk v8whbb3SUXYAeCjBptXFxyBib3onNUt2yYrsoC+ROx7dO11PMLPviUZoJS1kKs+umZ7X yYLPTg/CZshz3VTPsQFNrMRsRUJdu2/qpjBff5vJHogJeyiEssCEEnIiFnEF3fBk3Lz8 PISg== MIME-Version: 1.0 X-Received: by 10.180.97.233 with SMTP id ed9mr2939892wib.32.1365579516977; Wed, 10 Apr 2013 00:38:36 -0700 (PDT) Received: by 10.216.34.9 with HTTP; Wed, 10 Apr 2013 00:38:36 -0700 (PDT) In-Reply-To: <20130408084756.GD31958@server.rulingia.com> References: <20130405211249.GB31958@server.rulingia.com> <20130408084756.GD31958@server.rulingia.com> Date: Wed, 10 Apr 2013 09:38:36 +0200 Message-ID: Subject: Re: Regarding regular zfs From: Joar Jegleim To: Peter Jeremy Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 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: Wed, 10 Apr 2013 07:38:44 -0000 no compression or dedup . I've found some hardware to setup a test system where I can debug this thorough, but it's gonna take some time . Appreciate all help, I'll get back to you when I've got a test environment and have done some more tests. -- ---------------------- Joar Jegleim Homepage: http://cosmicb.no Linkedin: http://no.linkedin.com/in/joarjegleim fb: http://www.facebook.com/joar.jegleim AKA: CosmicB @Freenode ---------------------- On 8 April 2013 10:47, Peter Jeremy wrote: > On 2013-Apr-08 10:29:52 +0200, Joar Jegleim > wrote: > >I'll check how cache is doing, but as I wrote in my previous reply, the > >'slave' server is completely unresponsive, nothing works at all for 5-15 > >seconds, when the server is responsive again (can ssh in and so on) I > can't > >seem to find anything in dmesg or any log hinting about anything at all > >that went 'wrong' . > > If you have iostat/gstat/top/... running, does it hang (stop updating) > during this period? Is it pingable during the "hang"? > > How about iostat/gstat/top/... running on the console? > > Do you have compression or dedup enabled? > > >I could try DDB, I'm gonna have to get back to you on that, I haven't > >debug'ed FreeBSD kernel before and the system is in production, so I would > >have to be cautious. I might be able to try out that during this week . > > Do you have a test system that you can reproduce the problem on? The > reason I ask about DDB it that it would be useful to get a 'ps' whilst > the system is hung and it sounds like DDB is the only way to get that. > > -- > Peter Jeremy >