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Procedure

1. Estimate the log dataset capacity.

Estimate the amount of log data based on the frequency at which CLI commands are issued and

the frequency of errors. Allocate enough space to ensure that log data can be output until a

backup of the log dataset is created in one sequential dataset.

2. Create log datasets.

For the log dataset, specify the amount of the initial allocation only. The specification of any

additional allocation is ignored.

The following shows the format of the log dataset.

• RECFM: VB

• LRECL: 8196

• BLKSIZE: 8200

The following shows an example of creating log datasets in TSO/E.

ALLOC DS('USER01.YKLOG01') VOL(WKVL01) NEW SP(100) CYL DSORG(PS) RECFM(V,B) LRECL(8196) BLKSIZE(8200)

ALLOC DS('USER01.YKLOG02') VOL(WKVL01) NEW SP(100) CYL DSORG(PS) RECFM(V,B) LRECL(8196) BLKSIZE(8200)

3. Allocate the log datasets.

• For TSO/E, use the ALLOC command to allocate DD name YKLOG01 and DD name YKLOG02

to log datasets.

• When using JCL, specify DD statement YKLOG01 and DD statement YKLOG02 in the JCL.

The following shows a specification example in TSO/E.

ALLOC DD(YKLOG01) DS('USER01.YKLOG01') OLD

ALLOC DD(YKLOG02) DS('USER01.YKLOG02') OLD

The following shows a JCL specification example.

//YKLOG01 DD DSN='USER01.YKLOG01',DISP=OLD,VOL=SER=WKVL01,UNIT=DASD

//YKLOG02 DD DSN='USER01.YKLOG02',DISP=OLD,VOL=SER=WKVL01,UNIT=DASD

Allocate a log dataset for each job. When the job terminates, another job can reuse that log dataset.

In this case, logs are added to the end of the previous log output.

Note, however, that you need to reallocate a new log dataset rather than using the existing one in

the following cases:

• An I/O error occurred in the log dataset.

• The OS went down.

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Hp XP Command View Advanced Edition Software Manual do Utilizador Página 216