Date: Wed, 9 Jan 2008 10:36:34 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: "Alexandre \"Sunny\" Kovalenko" <alex.kovalenko@verizon.net> Cc: askbill@conducive.net, freebsd-current@freebsd.org Subject: Re: ZFS honesty Message-ID: <18308.59929.901540.689667@grasshopper.cs.duke.edu> In-Reply-To: <1199890529.756.10.camel@RabbitsDen> References: <fll63b$j1c$1@ger.gmane.org> <20080106141157.I105@fledge.watson.org> <flr0np$euj$2@ger.gmane.org> <47810DE3.3050106@FreeBSD.org> <flr3iq$of7$1@ger.gmane.org> <478119AB.8050906@FreeBSD.org> <47814160.4050401@samsco.org> <4781541D.6070500@conducive.net> <flrlib$j29$1@ger.gmane.org> <47815D29.2000509@conducive.net> <1199664196.899.10.camel@RabbitsDen> <47818E97.8030601@conducive.net> <18308.51970.859622.363321@grasshopper.cs.duke.edu> <1199890529.756.10.camel@RabbitsDen>
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"Alexandre \"Sunny\" Kovalenko" writes: > > On Wed, 2008-01-09 at 08:23 -0500, Andrew Gallatin wrote: > > =?UTF-8?B?6Z+T5a625qiZIEJpbGwgSGFja2Vy?= writes: > > > > OTOH that's all GPFS is. > > > > > > Far more features than that - 'robust', 'fault tolerant', 'Disaster Recovery' > > > ... all the usual buzzwords. > > > > > > And nothing prevents using 'cluster' tools on a single box. Not storage-wise anyway. > > > > Having had the misfortune of being involved in a cluster which used > > GPFS, I can attest that GPFS is anything but "robust" and "fault > > tolerant" in my experience. Granted this was a few years ago, and > > things may have improved, but that one horrible experience was > > sufficient to make me avoid GPFS for life. > Would you mind sharing your experience, maybe in the private E-mail. I > am especially interested in the platform you have used (as in AIX or > Linux) and underlying storage configuration (as in directly attached vs. > separate file system servers). > > I am running few small AIX clusters in the lab using GPFS 3.1 over iSCSI > and so far was fairly pleased with that. Linux, with GPFS 1.x over ethernet. If there was even the slightest load on the ethernet network, and a GPFS heartbeat message got lost, the entire FS would die. That did not meet my definition of robust :(. Note that this was nearly 4 years ago, so it has likely gotten better. > However, OP's point was that ZFS has inherent cluster abilities, of > which I have found no information whatsoever. Indeed, but I do remember hearing the Lustre/ZFS rumors. Drew
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