チェックポイント ファイルの割り当て
If any of the following applies, a checkpoint file of.
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If any of the following applies,
CA MIM for z/OS
a checkpoint file of.- When using CTCONLY intersystem communication method. In this environment, the local checkpoint file of each system is used to store the status information of the MIMplex system.
- When using XCF system communication method. In this environment, the local checkpoint file of each system is used to store the status information of the MIMplex system.
- When using ECMF job re-queue function. In this case, a local checkpoint file is used to keep track of the information associated with batch jobs that are pending (re-queued) by ECMF.
:
- If you do not know whether to assign a checkpoint file at this point, we recommend that you assign it. If you decide not to useCA MIM for z/OSthe checkpoint file requiredCA MIM for z/OSfunction, you can delete the assigned checkpoint file at a later time.
- CA MIM for z/OSCheckpoint fileCA MIM for z/OScan not be shared in the address space between multiple systems . For each MIMplex system, at least one checkpoint file is required.
- CA MIM for z/OSCheckpoint files need not be assigned to shared DASD volumes.
- CA MIM for z/OSSerializes access to the checkpoint file by issuing an ENQ SCOPE = SYSTEM request. Hardware RESERVE requests are not issued. In other applications, youCA MIM for z/OScan place a checkpoint file on a DASD device with other data sets, unless you issue a Hardware Reserve request to the selected DASD unit .
IMPORTANT:
CA MIM for z/OS
We do not support checkpoint files at elevated locations on Extended Address Volumes (EAV). When using EAV, be sure to allocate dataset using EATTR = NO.How to assign a checkpoint file
- Customize and submit the job of CAI.CBTDJCL (ALLOCKPT) member. This member also contains other useful things.
- CAI.CBTDPARM (MIMINIT)CA MIM for z/OSAdd the ALLOCATE command to the parmlib member .ThisCA MIM for z/OSassigns a new checkpoint file to the address space at startup .
note:
- CA MIM for z/OSThe usual naming convention for checkpointing files uses the system name as one of the dataset name's nodes.
- In this procedureCA MIM for z/OSyou can also assign one or more checkpoint files to only one system and use to expand the copy to each MIMPlex system.
- CA MIM for z/OSFor details on the checkpoint file and other intersystem communication methods, see CA MIM Programming .