This topic lists environment variables related to configuring the IMS environment in an enterprise server region.
| Variable | Description |
|---|---|
| ES_ACBLIB | The location of IMS ACB files. |
| ES_DFS3650 | The default transaction to execute or MOD file to be displayed after successfully signing on to IMS. You specify these by setting environment variables prior to the start of the region: ES_DFS3650 - set to MOD if a MOD file is to be sent, or TRX if a TRANSACTION is to be executed. If you set to MOD, ES_MOD3650 needs to be set to the name of the MOD you want to display. If you set to TRX, ES_TRX3650 needs to be set to the name of the transaction. |
| ES_IMS_BASIC_CHKP_OPT | When set to 1, enables a basic checkpoint call to process as if a SYNC call had been issued. The default is 0 (zero). |
| ES_IMS_BYPASS_OTMA_DEST_RES | By default, a CHNG call issued from an OTMA- or IMS Connect-submitted transaction assumes that the destination is the OTMA client. In some circumstances, the previous behavior of assuming a non-OTMA client is desirable. To use the previous behavior, set this environment variable to Y. |
| ES_IMS_CONFIG | The IMS TM parameters. |
| ES_IMS_DB_COMMIT_FLUSH | When set to 0 (zero), forces the flushing of database buffers to disk on CLOSE only (default). When set to 1, forces the flushing of database buffers to disk on COMMIT only. |
| ES_IMS_DB_TLOG_WRITETHRU | When set to 0 (zero), forces the flushing of TLOG buffers to disk on COMMIT only (default). When set to 1, forces the flushing of TLOG buffers to disk on all database I/O. |
| ES_IMS_DEADLOCK_WAIT | Time in milliseconds to wait before checking for a deadlock. The default is 1000 (1 second). |
| ES_IMS_DIAGNOSE | Marks IMS TM as diagnose mode only for IMSMSGQ. |
| ES_IMS_DOSVS_PCB | Emulates DOS/VSE PCB address alignment for EXEC DLI programs. |
| ES_IMS_DUMP_ON_DEADLOCK | Creates a system dump when a deadlock is detected. |
| ES_IMS_DUMP_ON_TIMEOUT | Creates a system dump when a lock timeout occurs. |
| ES_IMS_EXITPATH | The location of compiled code that contains segment and/or field exits. |
| ES_IMS_FORCE_SIGNON | Enables a user to force a sign-on to IMS on the current terminal and sign off from other terminals. |
| ES_IMS_GOTO_CICS_ON_SIGNOFF | Returns to CICS upon logging off or timing out, rather than returning to the IMS sign-on screen, which is the default behavior. |
| ES_IMS_IBMPLATFORM | Sets the emulation for the IMS run-time. Valid values are: M (for MVS) or D (for DOSVS). The default value is M.
Note: This variable is rarely required to be changed from its default, even for the majority of DOSVS users.
|
| ES_IMS_IMSID | Allows the user to specify the IMS System ID returned to the AIBTDLI INQY ENVIRON call. |
| ES_IMS_INQY_OTMA | Returns TPIPE, MBR, SYNC, and MSYNC to an INQY call. |
| ES_IMS_INQY_UNKNOWN | Value returned to an INQY call. |
| ES_IMS_IRLM | Enables Internal Lock Resource Manager (IRLM) locking. IRLM locking more closely parallels mainframe IMS database DB locking behavior, reducing data constraint and potential for deadlock. |
| ES_IMS_LOCALDLI | Deprecated. See IMS Database Locking. When set to 1, directs batch program execution to process all IMS DB calls entirely in the JES initiator providing significant performance improvement. All IMS DB control processes accessed from the batch program must be stopped before execution because they become exclusively owned by JES until the program completes. |
| ES_IMS_LOCK_TIMEOUT | The number of seconds during which IMS DB control continues to retry a locked record before timing out. Valid values are 0 to 65535. The default is 30 seconds; a value of 0 indicates an indefinite wait time. |
| ES_IMS_LTERM_PREFIX |
Note: This is a technology preview feature only. It is being made available to allow you to test and provide feedback on this new
capability; however, this feature is not intended for production use and it is not supported as such.
Enables specification of a one- to four-character alternative LTERM prefix to apply when ES_IMS_SINGLE is set to N. The default is OTMA. |
| ES_IMS_LU_LTERM | Determines the value of the LTERM literal returned by the MFS system. Valid values are: Y to return the LU name; N to return the user ID. |
| ES_IMS_MESGQ | Sets the configuration for the IMS TM message queue. See ES_IMS_MESGQ in Environment variables in alphabetical order for details. |
| ES_IMS_PATH | The location of compiled COBOL applications. |
| ES_IMS_PLI_INDIRECT_PCBADDR |
Determines whether the PL/I program converts the PCB address list from a direct to an indirect addressing technique. Set the variable to one of the following values:
The default is D (dynamic). |
| ES_IMS_RCLASS |
Creates a set of newly-named IMS security resource classes, appending the variable's value (maximum of seven characters) to each resource class' default character. Create theses custom-named classes if you are using the same ESM active directory with two Enterprise Server systems and your security needs to differ for each. See Resource Classes for IMS Security for the names of the resource classes created if this variable is not set. |
| ES_IMS_RELEASE | Allows the user to specify the IMS Release returned to the AIBTDLI INQY ENVIRON call. |
| ES_IMS_REGION | Allows the user to specify the IMS Region returned to the AIBTDLI INQY ENVIRON call. |
| ES_IMS_ROLLBACK | Enables automatic Backward Recovery; enabled by default. |
| ES_IMS_ROLLFORWARD | Enables or disables Forward Recovery logging. Valid values are: Y to enable; N to disable. The default is N. |
| ES_IMS_SINGLE |
Note: This is a technology preview feature only. It is being made available to allow you to test and provide feedback on this new
capability; however, this feature is not intended for production use and it is not supported as such.
Enables or disables support for the same user ID to be signed on to multiple LUs simultaneously. Valid values are: Y to disable;
N to enable. The default is Y.
|
| ES_IMS_SPARSE_EXIT_LANG |
Indicates the language of the IMS DB secondary index sparse routines. Set the variable to one of the following values:
|
| ES_IMS_SUPPORT | Enables IMS support. |
| ES_IMS_TLOG_COMPRESS | When set to 0 (zero), disables compression of the Backward Recovery TLOG file. When not compressed, the file contains only the information required to recover databases. The default is enabled. |
| ES_IMS_TLOG_FLUSH | When set to 1, forces the frequent flushing of TLOG and database buffers to disk.
Note: This environment variable is deprecated. Use ES_IMS_DB_TLOG_WRITETHRU to flush TLOG buffers and ES_IMS_DB_COMMIT_FLUSH to
flush database buffers.
|
| ES_IMS_TLOG_MAXSIZE | Maximum size of the IMS DB transaction logging file in bytes. The default is 4GB or h"FFF00000". |
| ES_IMS_TLOG_PATH | The location of IMS DB transaction logging files. The default is the Enterprise Server system directory. |
| ES_IMS_TLOG_THRESHOLD | Threshold size of the IMS DB transaction logging file. When reached, the current TLOG file is closed and a new TLOG file created for subsequent transactions. The default is 2GB or h"7FFFFFFF". |
| ES_IMS_LOCK_RETRY_DELAY | The IMS DB lock retry delay in milliseconds. |
| ES_IMSCFG | The location of the IMS configuration files IMSCONFG.DAT. This is reserved for future use. |
| ES_IMSDAT | The location of IMS DB data files. |
| ES_IMSLIB | The location of DBDGEN2.DAT, DBDGEN2F.DAT and PSBGEN3.DAT files. |
| ES_MFSLIB | The location of the control blocks generated by the MFS generation program. |
| ES_MOD3650 | The default MOD file to be displayed after a successful sign-on to IMS. See ES_DFS3650. |
| ES_SSTM_IMS | Location of the JCL used to initialize the SSTM IMS environment. |
| ES_TRX3650 | The default transaction to run after a successful sign-on to IMS. See ES_DFS3650. |
| ES_TMC_AGGREGATE | Controls the performance environment for IMS TM data stores. See ES_TMC_AGGREGATE in Environment variables in alphabetical order for details. |
| ES_USR_DFLT_IMS | Allows you to override the default user when no user is logged on for IMS authentication. |
| ICONN1 | Controls the client TCP connection status of an IMS Connect emulator. |
| IMSCPY | The location of copybook files for DBDGEN, PSBGEN and MFSGEN utilities . |
| MFIMS_ACBDUMP_TIMESTAMP | Suppresses date/time stamp display in ACB report. |
| MFIMS_BMPCHKP | Returns a QC to a checkpoint call when it the call includes an IO area. |
| MFIMS_BTS | Configures Mainframe Express-format BTS tracing |
| MFIMS_DIBSTAT_CODES | Specifies additional DIBSTAT return codes to be returned to EXEC DLI program. |
| MFIMS_DLI_OPT | Specifies DL/I call optimization flags. |
| MFIMS_DIAG | Enables IMS BTS format diagnostic tracing. |
| MFIMS_FLUSHTRACE | Flushes BTS trace file to disk after every write. |
| MFIMS_FP_DA | Bypasses keycheck on IMS Fastpath DB delete. |
| MFIMS_LOADMVS | Disables load of MVS support for IMS application programs. |
| MFIMS_PCBCALL | Allows a standalone EXEC DLI program to issue a PCB call. |