Re: [libvirt] image locking?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Oct 15, 2008 at 01:47:36PM -0700, Itamar Heim wrote:
> The main issue is indeed across nodes. As you pointed out, fnctl() won't
> solve the issue for iSCSI.
> What about the leased lock mechanism, for example, with libvirt playing
> an external watchdog and terminating the qemu process if it cannot renew
> the lock, or a central (nfs? Central service) storage to maintain the
> global locks.

When you get to that level of cleverness, it seems to me that it is verging 
on a complete re-implementation of DLM (distributed lock manager), which 
really, AFAIK, needs a proper cluster setup so it can safely fence 
mis-behaving nodes, and avoid quorum/split-brain problems.

Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

--
Libvir-list mailing list
Libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list

[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]