[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-ha-dev
Subject:    [Linux-ha-dev] Re: pl-cluster
From:       Andrew Barnett <andrew () dataclarity ! net>
Date:       2000-01-05 17:25:30
[Download RAW message or body]

(message edited for brevity)

Alan Robertson wrote:
> Andrew Barnett wrote:

> > There are some things my code does better than heartbeat, and some
> > (most?) things that heartbeat does much better. I chose to use 
> > multicasting -- not as reliable, but allows (theoretically) unlimited 
> > number of nodes. I also wrote everything in C/C++ since I tend not to 
> > like the mess made by calling billions of shell scripts. My code can 
> > run multiple "clusters" in one server process by using threads.
> 
> Does that mean that one machine can join multiple clusters simultaneously?

Yes, machines may join multiple clusters. Cluster communications can
be segmented in four ways: by multicast address, by port, by cluster
name, and by cluster secret. All of these 'channels' must match for
two nodes to communicate with each other. That also means you can have
many, many clusters communicating over the same hardware -- simply
change one 'channel' to segment the nodes.

> Thanks for the offer!  What's license are you using?

GPL v2

> What was the last version of heartbeat you looked at?

heartbeat-0.4.5a (I realize there's a new version...my cluster stuff
has been sitting around for a while).

> Did you implement strong authentication similar to the current code?

Every node in the cluster must know the cluster secret, otherwise the
node's packets are ignored. I haven't looked at the current code to
know what is done.

> I added a pointer to your code to the linux-ha web site.

I appreciate that, thank you.

-- 
======================================================================
Andrew Barnett                                      PO Box 701
Data Clarity, Inc.                                  Abington, PA 19001
andrew@dataclarity.net                              tel (877)496-3527
http://www.dataclarity.net/                         fax (801)382-1525
======================================================================


_______________________________________________________
Linux-HA-Dev: Linux-HA-Dev@lists.tummy.com
http://lists.tummy.com/mailman/listinfo/linux-ha-dev
Home Page: http://linux-ha.org/

[prev in list] [next in list] [prev in thread] [next in thread]