From owner-freebsd-fs@FreeBSD.ORG Mon May 9 10:52:58 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5AA12106564A for ; Mon, 9 May 2011 10:52:58 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta10.westchester.pa.mail.comcast.net (qmta10.westchester.pa.mail.comcast.net [76.96.62.17]) by mx1.freebsd.org (Postfix) with ESMTP id 08E9E8FC13 for ; Mon, 9 May 2011 10:52:57 +0000 (UTC) Received: from omta16.westchester.pa.mail.comcast.net ([76.96.62.88]) by qmta10.westchester.pa.mail.comcast.net with comcast id hNki1g0011uE5Es5ANsysu; Mon, 09 May 2011 10:52:58 +0000 Received: from koitsu.dyndns.org ([67.180.84.87]) by omta16.westchester.pa.mail.comcast.net with comcast id hNsr1g00R1t3BNj3cNsvGs; Mon, 09 May 2011 10:52:57 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id B9BA7102C19; Mon, 9 May 2011 03:52:49 -0700 (PDT) Date: Mon, 9 May 2011 03:52:49 -0700 From: Jeremy Chadwick To: Robert Schulze Message-ID: <20110509105249.GA58361@icarus.home.lan> References: <4DC13260.4020905@bytecamp.net> <20110504115540.GA88625@icarus.home.lan> <4DC7C522.3070601@bytecamp.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4DC7C522.3070601@bytecamp.net> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-fs@freebsd.org Subject: Re: zfs/zpool upgrade required? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 May 2011 10:52:58 -0000 On Mon, May 09, 2011 at 12:42:42PM +0200, Robert Schulze wrote: > Am 04.05.2011 13:55, schrieb Jeremy Chadwick: > >>Is it _required_ to upgrade existing pools and filesystems or can > >>that be done anytime later? > > > >- It can be done later, though by not upgrading you lose the ability to > >use newer features. > > well, the features are not the reason to upgrade the kernel. One > more question: could the pools and filesystems be upgraded while > there is pressure on them, or shall this procedure be made > "offline", i.e. without any clients accessing the machine? It can be done while I/O requests are being handled. Depending on pool size, amount of data, etc. the "upgrade" commands may take some time, though. If you're worried about customer/client impact, you'd best schedule downtime/a maintenance window. -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP 4BD6C0CB |