[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] COW-backed VBDs
> > or use a CoW NFS server (someone in > > Cambridge developed one but I don't know if the code is floating around). > > If you happen accross it I'd love to see it :) I'll ask around... > > I'll be working on a CoW filesystem also, later this year. > > Great to hear Mark. I'll be looking forward to it. :) Lots to do yet but if it all works out it should be way kewl. The only trouble is it requires lots of coding to happen first :-) I doubt I'll ever match the coolness of a UML CoW disk command I remember seeing - something like "cow_moo" :-D Cheers, Mark > Cheers, > John Fairbairn > > >> I have asked this question before about COW backed VBD support in Xen. > >> It > >> would be really cool if I could share the same root FS between domains, > >> each having its own COW system. > > > > Indeed. > > > >> I am typically using file-backed roots. Does Xen (as User-mode linux) > >> provide utility to create COW disks (linked to a readOnly main disk) > >> which > >> can be used as VBDs. > > > > You can use LVM2 snapshots or the Device Mapper to create a COW virtual > > device. LVM, at least, seems to have some issues with scalability when > > doing > > lots of CoW-ing though - make sure dom0 has enough memory. > > > > The other way of doing things is CoW at the filesystem, rather than at > > block > > level. E.g. combine NFS and UnionFS or use a CoW NFS server (someone in > > Cambridge developed one but I don't know if the code is floating around). > > I'll be working on a CoW filesystem also, later this year. > > > > Cheers, > > Mark > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@xxxxxxxxxxxxxxxxxxx > > http://lists.xensource.com/xen-users > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |