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Re: [Linux-cluster] GNBD, how good it is ?



On Fri, Jul 09, 2004 at 03:53:00PM +0100, Gareth Bult wrote:
> :)
> 
> I do appreciate all that, however there are some press releases out
> there that are not so clear ..
> 
> There is certainly an implication in the news items I've seen that this
> is "THE GFS" code .. as opposed to being a new and unstable version ..
> 
> .. Incidentally, I was being kind - I've had many kernel crashes, even
> after getting it going ..
> 
> Regards,
> Gareth.

The code you are using is not the code currently being sold by redhat.
That is the 6.0 code. You can download that in SRPM form at
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/3/en/RHGFS/i386/SRPMS/

There is fairly complete documentation for this code. However it does not use
the DLM.  Instead, GULM handles all the cluster manager issues.  This code only
runs on 2.4 kernels.

The CVS code is going to be sold starting with RHEL 4. Some of the components,
like the dlm are just now gotten out of the development stage. Others, like
gnbd have been drastically rewritten.  We REALLY appreciate all the testing
that people are doing on these pieces, however, if you are trying to run
something in production, I would encourage you to run the 6.0 code.

-Ben Marzinski
bmarzins redhat com

> On Thu, 2004-07-08 at 16:26 -0500, Brian Jackson wrote:
> 
> > > Hi,
> > >
> > > Just a general comment;
> > >
> > > I spent some time getting a cluster running, in summary - for anyone interested (IMHO);
> > <snip>
> > > Summary (IMHO);
> > 
> > > a.    Performance is good and it does work
> > >
> > > b.    It looks promising, yet still alpha/beta
> > 
> > I'm sure I read somewhere, that the current code is considered beta.
> > If I'm making that up, It's implied by the fact that the DLM is quite
> > new, and the port to 2.6 is also pretty fresh.
> > 
> > >
> > > c.    Until mirroring is implemented clvmd, it's not really replacement for NFS given the stability
> > 
> > It is if you've got shared storage that implements raid.
> > 
> > >
> > > d.    Documentation is severely lacking ...
> > 
> > Agreed, but that's why there's a wiki, mailing list, and irc channel.
> > 
> > >
> > > I'm sure it will be good with a little more work (!) , but I was hoping for production, and it's > not quite there yet ..
> > 
> > I'm sure Red Hat's product for RHEL is nice, stable, and production
> > ready. You are playing with relatively fresh code.
> > 
> > --Brian
> > 
> > >
> > > Regards,
> > >
> > > Gareth.
> > 
> > --
> > Linux-cluster mailing list
> > Linux-cluster redhat com
> > http://www.redhat.com/mailman/listinfo/linux-cluster
> 
> -- 
> Gareth Bult <Gareth Bult co uk>





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