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Allow use of the REUSE keyword on basic/non-advanced recovery plans
When the DB2 Recovery Expert for z/OS generates basic recovery plans for one or more tablespaces, it currently provides no provision in non-advanced recovery plans for the user to specify whether the REUSE keyword should be used in the generation/execution of the Db2 RECOVER utility. This keyword parm has been part of the Db2 RECOVER utility for a long time, and is used to improve the performance of the RECOVER utility by telling the RECOVER utility to reuse any underlying VSAM linear data sets, rather than deleting and reallocating them, which can take a measurable amount of time. This time can add up to be a noticeable portion of the overall elapsed time of the utility execution depending on how many tablespaces are involved in the recovery.
Currently, the user is allowed to specify the usage of the REUSE keyword in advanced or redirected recovery plans, but not in basic recovery plans that use the Db2 RECOVER utility.
Thus, basic recovery plans using the Db2 RECOVER utility may be taking longer than they really need to since the use of the REUSE keyword cannot currently be specified by the user.
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