RE: (clug-talk) Re: Fault tolerant system mirroring?

[rwtoole]

Roy, forgive me, and please correct me if I am wrong, I have never heard of a software license that would prevent you from using Linux HA (heartbeat) and the DRBD software to mirror your data between nodes.   The key with Linux HA is that the service you define in your HA configuration only actually runs on one node in a cluster at a time. The Backup or secondary node has the software installed but not running or actively servicing clients. It only starts up if the Heartbeat software detects the demise of the primary node.   Unless you have a particularly vicious software license, the fact that your software is only running on one node at a time should satisfy the licensing requirements.   If you don’t mind, what is the software you were planning to mirror?   Thanks,   -----Original Message----- From: Roy Souther [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 26, 2003 9:49 AM To: Calgary LUG Subject: Re: (clug-talk) Re: Fault tolerant system mirroring?   Many people are recommending a virtual server that is a cluster of nodes and for many reasons this is a much better way to do this but unfortunately we are needing to run an expensive program that would violate license to do such a setup. Mirroring would not violate the license. Slower and less reliable yes but much more cost effective and in this situation the slight delay in switching from the master to the mirror would not be a problem. We are currently looking at a few open source methods to do this, each with advantages and disadvantages. If we go ahead with this then I will post our plan to the Lethbridge LUG site with the information that we find. Keep the ideas coming. I think the best solution would be a kernel module that allowed for many Linux OS kernels to sync between them based on a set of rules. This would allow for non-identical systems to work this way with any Linux distribution and any combination of software. Roy Souther www.SiliconTao.com Changing the way people do business.