The RESTONL function restores a database from a database SAVE dataset created while the Adabas nucleus was active.
Notes:
This document covers the following topics:
To use the RESTONL (database) function, the following conditions must
be met:
The correct SAVE dataset must be supplied. It must have been created by an online database SAVE operation with the same version of Adabas as is used for the RESTONL.
The output database must have the same physical layout (device types, extent sizes) as the original database. The Associator and Data Storage datasets must be present and must have been previously formatted. The SAVE dataset to be restored may have originated for this or from a different database.
No Adabas nucleus may be active on the output database or on a database with the DBID of the output database.
The protection log (PLOG) dataset containing information written by the nucleus session at the time of the SAVE operation (see output of SAVE run) must be supplied. PLOG datasets from other sessions may also be included.
If the SAVE operation was performed with the DRIVES parameter, the SAVE datasets created can also be restored with the DRIVES parameter. In that case, the restore operation is performed from the different SAVE datasets in parallel. Alternatively, the SAVE datasets can be concatenated to a single SAVE dataset for a restore operation without the DRIVES parameter.
The result of this function is a database with the same physical status it had at the end of the ADASAV SAVE operation.
The BUFNO value, multiplied by the DRIVES parameter value, allocates fixed buffers for RESTONL operation. A value of 2 or 3 usually provides optimum performance; up to 255 is possible. A value greater than 5, however, provides little advantage and allocates a lot of space. The default is 1 (one buffer per drive).
The device type of the dual/multiple command log (CLOG). This parameter is required only if the device type of the CLOG is different from that specified by the ADARUN DEVICE parameter, which is the default.
DRIVES is the number of tape drives to be used for parallel restore processing. The number can range 1 to 8, inclusively; the default is 1.
EXCLUDE lists the numbers of the files to be excluded from the restore operation; that is, the files that are not to be restored. For a database restore:
no files specified in the EXCLUDE parameter will exist in the restored database; and
all files specified in the EXCLUDE parameter must exist on the save dataset.
The parameter is optional: if not specified, no files are excluded. A file number may be listed only once.
The EXCLUDE parameter is provided for use in recovery jobs built by the Adabas Recovery Aid (ADARAI).
NEWDBID may be used to assign a different database ID to the restored database. The ID can be in the range 1-65,535; if Adabas Online System Security is installed, DBID 999 is reserved.
If NEWDBID is specified, the ADARUN DBID parameter must specify the ID of the database on the SAVE dataset.
No Adabas nucleus may be active with the DBID specified on NEWDBID.
NEWDBNAME assigns a new name to the restored database. If NEWDBNAME is not specified, the restored database keeps its old name.
When an error is encountered while the function is running, the utility prints an error message and terminates with user abend 34 (with a dump) or user abend 35 (without a dump).
If NOUSERABEND is specified, the utility will not abend after printing the error message. Instead, the message "utility TERMINATED DUE TO ERROR CONDITION" is displayed and the utility terminates with condition code 20.
If the restore operation is to overwrite an existing database, the OVERWRITE parameter must be specified. No Adabas nucleus may be active on the database to be overwritten.
The device type to be assigned to the dual/multiple protection log (PLOG). This parameter is required only if the device type of the PLOG is different from that specified by the ADARUN DEVICE parameter.
PLOGNUM specifies the number of the nucleus protection log used while the ADASAV SAVE operation was active (see output listing of the online SAVE function). Sequential protection (SIBA) logs from more than one nucleus session can be concatenated. ADASAV skips protection logs with a number lower than the PLOGNUM value. PLOGNUM is optional.
If PLOGNUM is not specified, ADASAV automatically determines the correct value from information stored in the SAVE dataset.
SYN1 specifies the block number containing the SYN1 checkpoint at which the corresponding SAVE operation began (see output listing of the online SAVE function). This parameter is optional.
If SYN1 is not specified, ADASAV automatically determines the correct value from information stored in the SAVE dataset.
The TEST parameter tests the operation syntax without actually performing the operation. Only the syntax of the specified parameters can be tested; not the validity of values and variables.
ADASAV RESTONL
Restore the database saved when the nucleus was active (online). The protection log number and SYN1 block number required for the restore operation are determined automatically by ADASAV.
ADASAV RESTONL ADASAV EXCLUDE=255 ADASAV EXCLUDE=400
Files 255 and 400 are excluded from the restore of the database from an online-save dataset.
