AoE -- was Re: todolist

Hello Matt,

  How have you found AoE?  I was looking at this 12months ago,
and have considered it on/off for the NAS device that I'm developing.
I've not run it yet - but one think I couldn't resolve through reading
was whether or not it supported more than one AoE client per
AoE device/server?

I.e. if it really is ATA over Ethernet, then wouldn't there be contention
over who the "host" is for the "driver" if there were multiple "hosts"
trying to access the same data .. ?

I've also been underwhelmed by the AoE creators' claims that AoE
is secure because it runs at Layer-2 ... 


----- Original Message -----
>From: "Matt Dew" <[email protected]>
>To: <[email protected]>
>Subject: Spam: 25% |  Re: [Openmosix-devel] todolist
>Date: Wed, 26 Jul 2006 10:17:59 -0600
>
> Moshe,
> Correct, it is a shared disk. However, no special equipment is required.
> We set one up here pretty quickly, using AoE (ATA over Ethernet) with
> just an old computer sharing out a disk as a AoE device and configuring
> GFS to use that device.
> 
> AoE: http://www.linuxjournal.com/article/8149
> 
> Using GFS on top of a tmpfs or ramdisk could give us shared memory
> support.  ???
> 
> I don't know about iSCSI but given that GFS supports it and AoE,
> allowing for more than one underlying tech, I don't think it should be
> written off completely just yet.
> 
> I'm know nothing of CFS, per Aneesh's email. It's always good to have
> options, and definitely worth looking into.  
> 
> My concern is the openmosix project maintaining a file system.  Let
> other, more interested and qualified people, do that.  We can focus on
> the goal of the project. 
> 
> My humble opinion,
> Matt
> 
> 
> On Sat, 2006-07-22 at 21:30 +0000, Moshe Bar  wrote: 
> > GFS needs a shared disk device, which I am sure only few people have. 
> 
> > What we need in openMosix is an NFS of sort with shared mmap, link  
> > consisteny and cache consistency.
> > 
> > Moshe
> > 
> > 
> > On Jul 21, 2006, at 6:07 AM, Mike Wharton wrote:
> > 
> > > This is not really a problem, well if it was I'm sure I could work  
> > > around
> > > it. But I suspect GFS would be perfect for my (and most peoples)  
> > > needs.
> > >
> > > Thanks,
> > > Mike
> > >
> > >
> > >> I believe GFS was chosen a while back, since it's a real cluster
> > >> filesystem.  You could use iSCSI (or whatever) underneath.
> > >>
> > >> I think GFS is limited to 256 computers.   Is this a problem?
> > >>
> > >> Carl, you were talking about 700 computers.
> > >>
> > >> Matt
> > >>
> > >> On Thu, 2006-07-20 at 17:03 +0000, Paul Bennett  wrote:
> > >>> I second Mike's request, although being a secure filesystem isn't
> a
> > >>> hard and fast requirement for me.  I'd really like to do  
> > >>> something via
> > >>> iSCSI if that part matters.
> > >>>
> > >>> Thanks,
> > >>> Paul
> > >>>
> > >>> ----- Original Message ----
> > >>> From: Mike Wharton <[email protected]>
> > >>> To: openMosix-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > >>> Sent: Thursday, July 20, 2006 1:22:54 PM
> > >>> Subject: [Openmosix-devel] todolist
> > >>>
> > >>> Just a question, is there a wide need for an integrated
> filesystem?
> > >>> like Omfs but secure.
> > >>>
> > >>> This is a feature that could really benefit the work I do, as  
> > >>> ideally
> > >>> for
> > >>> me processes after migrating from front 'master' node would never
> > >>> migrate
> > >>> back during their lifespan.
> > >>>
> > >>> I'm just interested to know if this is a problem for many others
> as
> > >>> well,
> > >>> and if not how people combat the file access of migrated processes
> > >>> under
> > >>> openmosix.
> > >>>
> > >>> Thanks,
> > >>> Mike
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>
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--
Ian Latter
Late night coder ..
http://midnightcode.org/


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