
Offloading and Backing Up Datasets (TSIDOFL)
User Reference
Connectivity Systems, Inc.—Copyright © 2006
Use Pursuant to Company Instructions
13-27
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Information
TSIDOFL copies each dataset that is to be backed up or offloaded to the
output tape. In addition, OFFLOAD deletes the VTOC entry for a dataset
version as soon as the data has been transferred to the output tape. If for
any reason a backup or offload job that involves more than one dataset
terminates abnormally and, as a result, must be restarted, a special restart
procedure is required. This special restart procedure is discussed in the
next section.
Restarting
Backups
Backups must be restarted from the beginning because TSIDOFL sorts
the control statements internally. To restart a backup:
Restarting
Offloads
The same dataset cannot be offloaded twice. Therefore, TSIDOFL
automatically restarts with the next dataset to be offloaded. The datasets
already offloaded are in the incomplete offload dataset version. To restart
an offload:
Examples The following job offloads datasets based on control statements supplied
using the IJSYSIN input dataset SYSIN.DATASET. This tape or disk
dataset is deleted when the dataset is closed. Because no TLBL or DD for
OUTPUT was supplied, all datasets will be offload to a tape as version 1
version/
generation
number
Positional and only one number can be specified. If
UPSI xx1 is not set, EPIC regards the number as a
version number. If UPSI xx1 is set, EPIC regards
the number as a generation-number. They are only
valid for datasets defined in the catalog.
poolnm Specifies the name of the pool where the dataset
resides. It is only valid for Start Track 1 datasets.
Parameter Definition
Step Action
1 Scratch the incomplete backup dataset version.
2 Restart the TSIDOFL backup step.
Step Action
1 Do not scratch the incomplete offload dataset version.
2 Restart the job at the TSIDOFL step. Use the same input
control statements and disregard any error messages for
missing datasets. These datasets were offloaded by the
incomplete run and have been deleted from the VTOC.
3 Keep the TSIDOFL offload report and tapes from both the
incomplete and restarted runs.
4 If the offloaded datasets are subsequently onloaded, run
TSIDONL with the offload dataset versions from both the
incomplete and restarted runs.
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