[sheepdog] [PATCH] sheepkeeper: a new cluster manager specialized for sheepdog

[Liu Yuan]

On 10/21/2012 09:42 PM, Hitoshi Mitake wrote:
> This is still very incomplete, very buggy and very inefficient. The
> degree of incompleteness is that it doesn't free() obsolete memory
> area and checking return values of system calls which must be done.
> In addition, it can't handle many important situation of join and
> leave of nodes. And it doesn't handle almost every error. A single
> death of node can kill an entire system.
> 

I am wondering when the patch is ready to be merged? Not perfectly
functional but at least no obvious easy bugs and have complete error
handling.

> sheepkeeper cluster manager is designed as master-slave. So it can be
> SPOF. But I'm planning to let it be redundant by utilizing corosync.
> 
> This patch adds the new directory sheepkeeper/ for it, and the
> executable binary will be produced as sheepkeeper/sheepkeeper.
> The cluster driver for sheep is added as sheep/cluster/sheepkeeper.c.
> 
> And I have to note that this patch adds odd change to lib/event.c. A
> new member is added to struct event_info. This new member is added for
> avoiding memory corruption caused by other part of this patch. I can't
> pointed out the bug, I'll try to find it later and remove the dummy
> member.

For merging, this kind of bug should be dug out.

> If it can be improved, this can be an alternative of the group
> management part of ZooKeeper, and it doesn't depend on JVM.

I think if this patch set ready to be merged, I can lend hand to it and
it would be improved in a much faster pace.

Thanks,
Yuan