System and methods for remote access to IMS databases

摘要

Systems and methods are provided that allow client programs using IMS database access interfaces to access IMS database data available from IMS systems on remote logical partitions and remote zSeries mainframes rather than from a local IMS system. For example, a method may include intercepting an IMS request having a documented IMS request format from a client program executing on a source mainframe system. The method may also include selecting a destination mainframe system and sending a buffer including information from the request from the source mainframe system to the destination mainframe system and establishing, at the destination mainframe system, an IMS DRA connection with the IMS system from the request. The method may further include receiving a response from the IMS system, sending a buffer having information from the response from the destination mainframe system to the source mainframe system, and providing the information to the client program.

主权项

1. A source mainframe computing system comprising:
at least one general processor; at least one lower-cost processor; a client program executing on the source mainframe computing system, the client program configured to make an IMS database request using a documented IMS database request format; and a redirect subsystem configured to perform operations comprising:
intercepting the IMS database request,normalizing the IMS database request using a lower-cost processor eligible service request block,selecting a destination mainframe computing system to respond to the request, the selection being based on a map that associates remote IMS database subsystems with corresponding destination mainframe computing systems,scheduling a communication request directed to the destination mainframe computing system, the request including the normalized IMS database request,receiving a normalized response from the destination mainframe computing system,resuming the lower-cost processor eligible service request block to convert the normalized response into a documented IMS database response format, andproviding the converted response to the client program.