ANTMIN00 parmlib

Concurrent copy and virtual concurrent copy support use of parmlib to control ANTMAIN. This support is modeled on the XRC support for ANTASnnn and ANTCLnnn address spaces documented in Administering your extended remote copy environment.

You specify the ANTMAIN control parameters that are applied to all systems IPLed using a given SYS1.PARMLIB concatenation in parmlib member ANTMIN00. SDM does not support selecting a specific member in the same way that SYSP can be used to select the IEASYSxx member.

You can specify ANTMAIN control parameters that apply to a specific system name in a component-specific parmlib dataset named hlq .ANTMAIN.PARMLIB, in a member name equal to the system name, for example SYS1.ANTMAIN.PARMLIB(SYSTEM1). In this way, systems can share a common SYS1.PARMLIB concatenation and still have different ANTMAIN configurations. For each parameter, the value found in hlq .ANTMAIN.PARMIB(sysname) takes precedence, followed by the value in the ANTMIN00 member of the SYS1.PARMLIB concatenation, followed by the default value if not specified.

If the parmlib data sets are protected by a security product such as RACF®, ensure that the ANTMAIN address space has at least READ access authority to the data sets. Note that ANTMAIN needs this authorization even if your installation does not use concurrent copy or virtual-concurrent-copy.

Table 1. ANTMIN00 Parameters
Parameter	Value	Default
Category: STARTUP
CCAttnThrottle	String with one of these values: YES Throttles parallel attention behavior to a maximum of two parallel processes per controller session NO Does not restrict parallel attention processing per controller session. Aids in tuning the system to operate more efficiently during periods of high application updates.	YES
CCReadAhead	Integer in the range 3–64 Aids in tuning the system to operate more efficiently during periods of high application updates. This option allows you to set a maximum rate at which SDM reads updated track data from the controller cache. The integer value is the number of additional buffers obtained at the host for the read I/O for each concurrent copy session. Each buffer results in an additional 64K buffer being obtained from auxiliary storage and page fixed for the duration of the I/O request.	3
Hlq	String for the high level qualifier (up to 8 bytes)	SYS1
WSDSMsgMax	Integer in the range 1–10000 Maximum number of error messages to report to the console and syslog during working space dataset refresh processing, and as output from the LISTWS command. This value does not limit the number of lines reported by these functions when output is directed to a dataset.	10000
AllowPPRConWSDS	String with one of these values: NO Working space data sets on PPRC primary volumes are marked unusable for VCC YES Working space data sets on PPRC primary volumes are eligible for use by VCC. If used, the behavior of the FlashCopy® and PPRC operations depend on the installed storage control support. PMPREF If the WSDS is allocated on a Metro Mirror primary device, the FlashCopy Establish to the WSDS will indicate that the pair should not go into a duplex pending state as the result of this request. If a Preserve Mirror operation cannot be accomplished, the WSDS should still be used, allowing the pair to go into a duplex pending status as a result of the request PMREQ If the WSDS is allocated on a Metro Mirror primary device, the FlashCopy Establish to the WSDS will indicate that the pair must not go into a duplex pending state as the result of this request.	NO
Category: FLAG
NAME	String. The valid value is SMFVCC.
ACTION	String. Use with NAME(SMFVCC). The values for ACTION are: OFF SDM suppresses the capture of VCC data used in the creation of SMF Type 42 Subtype 4 records. An SMF Type 42 Subtype 4 record may still be created when the session ends, but it will not contain data for the VCC or Snapshot operation. ON SDM captures data and produces SMF Type 42 Subtype 4 records for the VCC or Snapshot operation when the session ends, and they will contain VCC or Snapshot data.	OFF