Re: [Xen-users] Sharing file/folder

[Erwan RENIER <erwan.renier@xxxxxxxxxxx>]

Le 14/02/2011 20:05, Simon Hobson a écrit :
> > I need to share some files between VMs. This files will be used to 
> > transfer some information (read/write). But I need do it without any 
> > network resource (NFS or others). I've tried to do it sharing a 
> > partition just for test proposes, but i see that when i create a file 
> > on one VM another can't see it and there isnt any concurrence in this 
> > approach.
> > Anyone can help me??
> Do it via networking. Think of each virtual machine guest as though it 
> was running on a separate bare metal computer and that's about what 
> you get with Xen in terms of inter-system communications.
> It might be possible to do it by sharing a virtual disk, but you will 
> NEED to run a cluster file system on it with appropriate software on 
> each machine that accesses it. Without a cluster filesystem, then you 
> are absolutely guaranteed to get terminal filesystem corruption.
> This would in effect be very similar to running a cluster FS on a 
> network volume.
> For networking there are many options depending on your needs. Clearly 
> you could set up a share via NFS (or any other file sharing service 
> you like), via tools like RCP or SCP, via something like rsync (which 
> works very well as a service), or several other options. 
Maybe you can make it by avoiding cache with directio or raw device,
But you will have to implement a locking system, unless you're sure the 
different VM's don't modify data at the same time
I never tried however, and , is there really a point ?

I 'd like to listen to your purpose here, i think it could be interresting.

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