Am 22.10.2009 um 18:28 schrieb Anthony Liguori <anthony@xxxxxxxxxxxxx>:
Avi Kivity wrote:
On 10/21/2009 07:13 AM, MORITA Kazutaka wrote:
Hi everyone,
Sheepdog is a distributed storage system for KVM/QEMU. It provides
highly available block level storage volumes to VMs like Amazon EBS.
Sheepdog supports advanced volume management features such as
snapshot,
cloning, and thin provisioning. Sheepdog runs on several tens or
hundreds
of nodes, and the architecture is fully symmetric; there is no
central
node such as a meta-data server.
Very interesting! From a very brief look at the code, it looks
like the sheepdog block format driver is a network client that is
able to access highly available images, yes?
If so, is it reasonable to compare this to a cluster file system
setup (like GFS) with images as files on this filesystem? The
difference would be that clustering is implemented in userspace in
sheepdog, but in the kernel for a clustering filesystem.
I'm still in the process of reading the code, but that's the
impression I got too. It made me think that the protocol for qemu
to communicate with sheepdog could be a filesystem protocol (like 9p)
Speaking about 9p, what's the status there?
Alex
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