Date: Mon, 1 Mar 2010 12:51:30 -0600 From: "Doug Poland" <doug@polands.org> To: "Leinier Cruz Salfran" <salfrancl.listas@gmail.com> Cc: freebsd-cluster@freebsd.org Subject: Re: Cluster Filesystem on FreeBSD Message-ID: <ddad597df7a29de0fd35ba69dedfbc63.squirrel@email.polands.org> In-Reply-To: <a2585ef1003011011x21999933g25f54d36e24c10ba@mail.gmail.com> References: <4B8A4EFF.9050207@argonsoft.de> <a2585ef1003011011x21999933g25f54d36e24c10ba@mail.gmail.com>
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On Mon, March 1, 2010 12:11, Leinier Cruz Salfran wrote: > On Sun, Feb 28, 2010 at 6:09 AM, Erik Scholtz, ArgonSoft GmbH > <escholtz@argonsoft.de> wrote: > >> I did some research the last two weeks on how to build a cluster >> filesystem on FreeBSD. >> >> My solution at the moment is, to rsync all filesystems once a >> minute, which is rather to rare. So I tried to get a hook with >> KQueue to rsync the filesystems on data-change. Unfortunatly I could >> not find a working solution (had a try with IO::KQueue using perl). >> > > i use rsync to make partial data backup .. ie: /etc, /usr/local/etc, > /usr/home, /var/logs ... > >> How do you guys solve this problem (of a shared filesystem with >> rw-option)? >> Any hints are welcome, since I'm getting very frustrated at the >> moment. >> > > there is a project named 'hast'[1] for a clustered filesystem .. it's > being developed by pawel .. the project has some completed milestones, > so you can get it from fbsd src svn tree .. hast can do clustered > filesystem right now but it's not complete, so there is no stable yet > > other way is gmirror[2] + ggated .. with that you can get a raid1 over > net solution .. but i think it's not prepared to be used as > master-master soluction > Neither hast nor gmirror+ggatd are cluster filesystems, in that only one "side" of the storage is available for writes at a point in time. Filesystems like OCFS2 and GFS allow multiple, simultaneous read-write access to block devices. Given there is not true cluster filesystem available for FreeBSD at this time, I wonder aloud why so many people are so quick to dismiss NFS? NFS provides "most" of features of a cluster filesystem today. If one were to choose NFS for shared storage, one could use tools available today to make NFS highly available (hast, gmirror+ggated). -- Regards, Doug
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