CA MIM supports DASD files and coupling facility list structures for the communication method. The CA MIM control file is kept on the shared physical file. Individual CA MIM systems access the control file when it required global communication.
You can, at any given time, have 100 control files that are allocated for use by CA MIM. However, only the current control file is used for global communications. During a hardware or software failure, CA MIM automatically migrates to an alternate physical control file.
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