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Re: [Linux-cluster] Fedora 19 cluster stack and Cluster registry components

On 04/22/2013 02:36 PM, Michael Richmond wrote:
I am researching the new cluster stack that is scheduled to be delivered
in Fedora 19. Does anyone on this list have a sense for the timeframe
for this new stack to be rolled into a RHEL release? (I assume the
earliest would be RHEL 7.)

On the Windows platform, Microsoft Cluster Services provides a
cluster-wide registry service that is basically a cluster-wide key:value
store with atomic updates and support to store the registry on shared
disk. The  storage on shared disk allows access and use of the registry
in cases where nodes are frequently joining and leaving the cluster.

Are there any component(s) that can be used to provide a similar
registry in the Linux cluster stack? (The current RHEL 6 stack, and/or
the new Fedora 19 stack.)

Thanks in advance for your information,
Michael Richmond

Hi Michael,

First up, Red Hat's policy of what is coming is "we'll announce on release day". So anything else is a guess. As it is, Pacemaker is in tech-preview in RHEL 6, and the best guess is that it will be the official resource manager in RHEL 7, but it's just that, a guess.

As for the registry question; I am not entirely sure what it is you are asking here (sorry, not familiar with windows). I can say that pacemaker uses something called the CIB (cluster information base) which is an XML file containing the cluster's configuration and state. It can be updated from any node and the changes will push to the other nodes immediately. Does this answer your question?

The current RHEL 6 cluster is corosync + cman + rgmanager. It also uses an XML config and it can be updated from any node and push out to the other nodes.

Perhaps a better way to help would be to ask what, exactly, you want to build your cluster for?


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