Hello, I would like to suggest that in the future if you have GDPS questions you send them to [email protected]. Hopefully you will get a more timely response.
To derive the maximum benefit from a multi-site active/active configuration, it should be possible to transparently swap from the primary to secondary disks. Thus, the critical applications have been enabled for data sharing, with some production systems in the "primary" site, and others in the recovery/secondary site. The combination of multisite data sharing and HyperSwap means that the applications will remain available across outages affecting a software subsystem (DB2, for example), an operating system, a processor, a Coupling Facility (CF), or a disk subsystem (primary or secondary). The only event that could potentially result in a temporary application outage is an instantaneous outage of all resources in the primary site; this could result in the database managers in the recovery/secondary site having to be restarted. The move to an active/active workload may require creating some minor changes to the GDPS definitions (site-table, BCPii setup), some new GDPS scripts, and modifications to existing ones, depending on whether new systems/servers will be added or some of the existing ones moved to the other site. However, apart from that, there is no fundamental change in the way GDPS is setup or operated. For example, few customers initially ran a 2-site logical GDPS cluster within one location, built the new (secondary) data center and implemented the cross-site connectivity, moved the disk subsystems first, and then spreading/balancing the physical sysplex resources (servers - CPC, CF). Basically in this scenario no GDPS changes were required once the move was performed. I assume you have an IBM GTS person with GDPS services skills engaged for your implementation. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
