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

Re: [ogfs-dev]ogfs_jadd and EVMS FSIM



On Tue, 2003-04-15 at 15:21, Ram Pai wrote:
> On Tue, 15 Apr 2003, Greg Freemyer wrote:
> 
> > All,
> > 
> ..snip...
> > 
> > Ram, possibly you could say if that is appropriate or not.  (i.e. Does 
> > EVMS know when nodes are being added to a cluster?)
> 
> It depends on the cluster manager that EVMS interacts with. Currently EVMS
> interacts with Linux-HA cluster manager. Linux-HA cluster manager does
> not allow dynamic addition of nodes to the cluster. All the nodes that
> can possibly be part of the cluster are predefined in a configuration
> file.  So the maximum number of nodes that can be in a cluster is well 
> known. EVMS as it currently stands assumes a static cluster.
> 
> So to answer your question, EVMS does not know when nodes are being
> added to a cluster. However EVMS comes to know when a eligible nodes
> join or leave the cluster, through the Linux-HA's membership services.
> 
> 
> Now the question is: does OpenGFS assume a static cluster or a dynamic 
> cluster?

It should be a goal for OpenGFS to work on both.  Even static clusters
can have updates (config files changed and committed) that change the
membership.  A dynamic cluster does that in a different way.  In both
cases, OpenGFS needs to learn about it.

This abstraction is the motivation for an Event Service like the ones
defined for OCF and (soon) SAF.

-- Joe DiMartino <joe@osdl.org>




-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf
_______________________________________________
Opengfs-devel mailing list
Opengfs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/opengfs-devel

[Kernel]     [Security]     [Bugtraq]     [Photo]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Clusters]     [Linux RAID]     [Yosemite Hiking]     [Linux Resources]

Powered by Linux