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Operating environment

NGT Recover requires the operating environment described in this section.

DB2 support

This version of NGT Recover supports IBM DB2 Versions 10, 11, and 12. DB2 Version 10 is supported only in new-function mode.

System requirements

This version of NGT Recover supports all versions of the IBM z/OS system that IBM supports and that are compatible with IBM DB2 Versions 11 and 12.

Following are some considerations based on operating system level:

  • If you are running z/OS Version 1.7 or later, you can use NGT Recover to recover table spaces and index spaces by using large format (greater than 64 K tracks) archive logs and image copies.

  • If you are running z/OS Version 1.10 or later, NGT Recover supports extended address volumes (EAVs) for DB2 spaces, Instant Snapshot copies, active logs, and the BSDS.

  • If you are running z/OS Version 1.11 or later, NGT Recover supports archive logs and sequential image copy data sets in the cylinder-managed portion of EAVs.


    You cannot use an image copy made to the cylinder-managed portion of an extended address volume (EAV) under z/OS Version 1.11 on z/OS Version 1.10 because z/OS Version 1.10 does not support sequential data sets in the cylinder-managed portion of an EAV.

  • IDCAMS and DSNUTILB must be available in the system LPA, LINKLIST, JOBLIB, or STEPLIB.


NGT Recover ascertains if the system has IBM z Integrated Information Processors (zIIPs). If it does, NGT Recover offloads as much processing as possible to zIIP processors.


When you use zIIPs, BMC recommends that you specify IIPHONORPRIORITY=YES in the IEAOPT member of SYS1.PARMLIB.

You can disable use of zIIP processors by specifying OPTIONS ZIIP DISABLED.

Setting the MEMLIMIT parameter

The following products and components require above-the-bar memory and might abend if sufficient memory is not available:






  • NGT Copy


  • High-speed Apply Engine


  • Log Master

  • NGT Recover




In z/OS versions before 1.10, the default value for the System Management Facility (SMF) MEMLIMIT parameter is 0; a value of 0 means that no address space can use virtual storage above the bar. In z/OS Version 1.10 and later, the default value is 2 GB.

For most jobs, BMC recommends a value of at least 1 GB for the MEMLIMIT parameter. However, if you are operating on LOB or XML data, BMC recommends a value of at least 32 GB.

This value is set in member SMFPRMxx in SYS1.PARMLIB. Use any of the following methods if you need to override the default value:

  • Specify the MEMLIMIT parameter in the JCL.

  • Specify REGION=0M in the JCL.

  • Use the SMF IEFUSI exit.

Software requirements

This version of NGT Recover has the following requirements for additional IBM or BMC:

  • You must have a minimum of version 12.1.00 of the BMC DB2 Solution Common Code (SCC) installed.

  • If you want to offload eligible processing to a zIIP, you must have installed a minimum of version 6.2 of either XBM or SUF.

    If you use the XBMID option to specify a particular XBM subsystem, that subsystem must be at this maintenance level. If you do not specify a particular XBM subsystem and ZIIP ENABLED is in effect, NGT Recover searches for an XBM subsystem at this level.

  • To use any features that invoke DSNUTILB, you must have installed the IBM DB2 RECOVER utility.


    If NGT Recover invokes DSNUTILB, the call displays in the AFRPLAN and AFRPRINT output files, and DSNUTILB messages display in the AFRPRnnn output files.

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