Changing RECON data set characteristics

You can change many aspects of the RECON data set by adding or removing spares, replacing the active data set, or changing it from single to dual mode.

Adding a spare RECON data set
IMS normally works with two active RECON data sets. If one RECON data set becomes unavailable, a spare RECON data set will be activated, if a spare is available.
Removing a spare RECON data set
There may be certain instances where you need to remove a RECON data set (for instance testing in a nonproduction system or maybe a damaged DASD).
Replacing an active RECON data set
There might be circumstances for which you need to replace an active RECON data set, for instance on a test system.
Changing the RECON data set mode from single to dual
IMS normally works with two active RECON data sets. If one RECON data set becomes unavailable, a spare will be activated if a spare is available.

Parent topic: Controlling log data set characteristics