Re: Questions about SmartFrog

Hi All,

Thanks for your replies about this topic.

I'd like to share more details about my cluster with you.
As you know, it's a cluster includes hundreds of nodes. We divide
these nodes into
two categories: management nodes and computing nodes.

For computing nodes, they just run the task arranged to them, do not
have management roles, so we don't care it in this case.

For management nodes, we have a dozen of this kind of nodes in the
cluster. Only
one of them is the master node whose responsibility is to manage the
entirely cluster, others are just the master candidates. The reason we
do it in this way is to avoid single point failure, once the master
node fails, a master candidate will take over its job, and become the
new master node. So we have the heartbeat mechanism to detect the node
status to realize fail-over.

Now there is a limitation: our cluster relies on shared-file system(such as NFS)
which can be accessed by all the management nodes.That means all the config
files placed on the shared-file system, all the management nodes need these
config files. It's the master node's responsibilityto update these config file
according to user's request, after a fail-over, the new master node
will read these
config file to know the latest configuration.

Now we want to remove the shared-file system dependency, each management
node has config files in its local file system. So obviously, we need
a mechanism
to synchronize these config files on all the management nodes. That's
why I asked
that questions.

I don't know whether there is a inbuilt component or service can
provide this kind of mechanism in SmartFrog. Certainly I will
investigate Anubis first, thanks for your sharing.


Regards,
Qian

-------------------------------------------------------------------------
SF.Net email is sponsored by: The Future of Linux Business White Paper
from Novell.  From the desktop to the data center, Linux is going
mainstream.  Let it simplify your IT future.
http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4