[Engine-devel] shared fs support

[Dan Kenigsberg]

On Tue, Dec 13, 2011 at 02:57:33PM -0500, Saggi Mizrahi wrote:
> On Sun 11 Dec 2011 10:15:23 AM EST, Andrew Cathrow wrote:
> >
> >
> > ----- Original Message -----
> >> From: "Saggi Mizrahi"<smizrahi at redhat.com>
> >> To: "VDSM Project Development"<vdsm-devel at lists.fedorahosted.org>, engine-devel at ovirt.org
> >> Sent: Friday, December 9, 2011 5:41:42 PM
> >> Subject: [Engine-devel] shared fs support
> >>
> >>
> >> Hi, I have preliminary (WIP) patches for shared FS up on gerrit.
> >> There is a lot of work to be done reorganizing the patches but I
> >> just wanted all the TLV guys to have a chance to look at it on
> >> Sunday.
> >>
> >> I did some testing and should work as expected for most cases.
> >>
> >> To test just connectStorageServer with storageType=6 (sharedfs)
> >> connection params are
> >> {'id'=1,
> >> 'spec'='server:/export'
> >> 'vfs_type'='nfs\gluster\smb'
> >> 'mnt_options'='opt,opt=3,opt' }
> >>
> >> to check with an existing NFS domain you can just
> >> spec=server:/export
> >> vfs_type=nfs
> >> mnt_options=soft,timeo=600,retrans=6,nosharecache,vers=3
> >
> > So does that mean that we treat nfs custom types differently  -eg using the out or process stuff?
> >
> >
> >>
> >> I only tested NFS but I am going to test more exotic stuff on Monday.
> >>
> >> This is the patch to build the RPM from.
> >> http://gerrit.ovirt.org/#change,560
> >>
> >> Have a good weekend
> >>
> >> _______________________________________________
> >> Engine-devel mailing list
> >> Engine-devel at ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>
> 
> Using the custom NFS will give you the tested supported options and 
> limits. Using sharedfs will give you a generic implementation. 
> Currently the underlying implementation is the same. But there is a 
> plan to use a simpler implementation (without using OOP as it's an NFS 
> specific hack) and also loose stale handle checks and other NFS 
> specific stuff.

Without a proof to the contraty, I would suspect that other shared file
system would have the tendency to disappear, leaving client application
in D state. We may need the oop hack for them, too.