IDS 11 RSS promotion to a primary in DR

We are in the process of considering an IDS 11 upgrade. We'd like a setup that addresses both High Availability, HA, and disaster recovery, DR. We currently are on IDS 10 with HDR only. I am in the process of proposing a business case of having IDS 11 with HDR primary and secondary at one location, and a remote RSS server for DR. A total of 3 servers. I attended a presentation at IIUG by Carlton Doe which outlined this - in his book that accompanies this, he mentions that an RSS server cannot be promoted to a primary, only a secondary. What about in the event of a hurricane, bomb, or any kind of complete data center failure (ie a real disaster) of both the HDR servers - what would the process be to get the RSS server to now take over as the primary? Thanks.

bill.abler@gmail.com wrote: > We are in the process of considering an IDS 11 upgrade. We'd like a > setup that addresses both High Availability, HA, and disaster > recovery, DR. We currently are on IDS 10 with HDR only. I am in the > process of proposing a business case of having IDS 11 with HDR primary > and secondary at one location, and a remote RSS server for DR. A > total of 3 servers. > > I attended a presentation at IIUG by Carlton Doe which outlined this - > in his book that accompanies this, he mentions that an RSS server > cannot be promoted to a primary, only a secondary. What about in the > event of a hurricane, bomb, or any kind of complete data center > failure (ie a real disaster) of both the HDR servers - what would the > process be to get the RSS server to now take over as the primary? If both the primary and the HDR secondary are lost, then there is no issue. You would simply issue "make primary" on the RSS node, and it would function as a stand-alone server. The issue is that the RSS node is coordinated with the primary/hdr-secondary node, but unlike HDR, we do not insist that the RSS node be coordinated with the checkpoint. Because of that, it is not always possible to promote the RSS node into a primary with the idea that the existing HDR secondary can become a secondary to the RSS node. They could have differing recovery checkpoints. > > Thanks.

In this total disaster scenario (HDR pair down), you can convert RSS to a standard server. Secondly, RSS can be made primary if it was made HDR Secondary before. Here is how ... in your HA & DR solution, consider a scenario, when your HDR primary fails, you can promote HDR Sec to new Primary and RSS to new HDR Sec. Then if your new primary also fails, you can convert current HDR Sec (i.e. original RSS) to new Primary. HTH, Nilesh. informix-list-bounces@iiug.org wrote on 02/11/2008 03:50:06 PM: > We are in the process of considering an IDS 11 upgrade. We'd like a > setup that addresses both High Availability, HA, and disaster > recovery, DR. We currently are on IDS 10 with HDR only. I am in the > process of proposing a business case of having IDS 11 with HDR primary > and secondary at one location, and a remote RSS server for DR. A > total of 3 servers. > > I attended a presentation at IIUG by Carlton Doe which outlined this - > in his book that accompanies this, he mentions that an RSS server > cannot be promoted to a primary, only a secondary. What about in the > event of a hurricane, bomb, or any kind of complete data center > failure (ie a real disaster) of both the HDR servers - what would the > process be to get the RSS server to now take over as the primary? > > Thanks. > _______________________________________________ > Informix-list mailing list > Informix-list@iiug.org > http://www.iiug.org/mailman/listinfo/informix-list