Date: Fri, 5 Oct 2001 20:24:23 +0100 (BST) From: Joshua Goodall <joshua@roughtrade.net> To: =?iso-8859-1?q?Fabrizio=20Ravazzini?= <freefabri@yahoo.it> Cc: <freebsd-cluster@freebsd.org> Subject: Re: NFS Alternatives? Message-ID: <Pine.LNX.4.33.0110052002090.31480-100000@elm.phenome.org> In-Reply-To: <20011005184111.93369.qmail@web20105.mail.yahoo.com>
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On Fri, 5 Oct 2001, [iso-8859-1] Fabrizio Ravazzini wrote: > Hello all I would like to build a mail/web cluster > server like this: > > Machine---+ > A | +-----+ > +-|Disks| > Machine-----| | > B +-----+ > > I want the two machines accessing the disk array > (for example the Compaq smart array disk set) at the > same time and load balanced. > I'd like the disks attached at the two machines via > scsi or Ethernet. Parallel writeable mounts are not in any release version of FreeBSD. > To manage the Load Balancing I think to use > Balance.sourceforge.net or Dns RoundRobin. You need something slightly more intelligent than roundrobin DNS, unless you want half your users to lose access if a machine goes down. IIRC, Balance requires another machine in front of A & B. > But to share the disks... > ...I've thinked about NFS but we need a third machine > to manage the NFS server for the array. > Then I've found Gfs (Global File System) but seems > only for LinuX. I recently rejected GFS for a production recommendation on the grounds of a) lack of production maturity b) STOMITH c) DMEP d) Linux-only. Your criteria may vary. Other parallel filesystems exist (e.g. CXFS, AdvFS) but not in FreeBSD and only at the research/experimental level for Linux, AFAIK (e.g. PVFS, which isn't a high-availability architecture anyway). > The problem is that I don't want the single point of > failure which is the NFS server. You'll need to look at commercial products (HA-NFS implementations, Netapps etc), not OSS, for this, unless you can get away with application-level replication. I'd love to be told I'm wrong on the above. Anyone know of a OSS (BSD or GPL) *production-grade* HA-NFS or parallel-mount fs (other than GFS)? Joshua To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-cluster" in the body of the message
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