Specifying /SWITCH OLDS causes the IMS™ log to switch to the next OLDS. This switch to the next OLDS is marked as a recovery point for log archiving purposes. If you also specify the (optional) CHECKPOINT keyword, IMS issues a simple checkpoint after the active log data set has been switched to the next OLDS. This switch capability is identical to that provided with the DBRECOVERY command, as described in Preventing programs and transactions from updating DBCTL databases and Log control with DBRC.