HP 3000 Manuals HP 3000 Manuals
RESTORELOG
Restores a log file that had been previously backed up with the STORELOG
command.
Scope
SQLUtil Only
SQLUtil Syntax
>> RESTORELOG DBEnvironment Name: DBEnvironmentName Maintenance Word:
MaintenanceWord Input Device: DeviceName Local (y/n) (opt): {Y[es]}
{N[o] }
Restore the Log File (y/n)? {Y[es]} Rename LogFileName Log File To:
{N[o] }
[NewName[.NewGroup[.NewAccount]]]
Parameters
DBEnvironmentName is the name of the DBEnvironment to which the log
files are being restored.
MaintenanceWord is the maintenance word.
DeviceName is the name of the tape or other backup device
from which you are restoring the log file.
Local specifies whether the log is to be restored to
the local group and account or to the group and
account from which it was originally stored.
Reply Y for the local group and account.
NewName [.NewGroup. is a new name you are specifying for a log file
[NewAccount]] after you restore it. The default is the same as
the file name specified. If you include the
optional NewAccount, it must be the same as the
account name of the DBECon file.
It is easier to restore log files in proper order
if you specify a new name which contains the log
sequence number of the log file as part of the
new file name.
Description
* This command lets you restore one or more previously stored
archive log files. If only one log file was stored with a given
invocation of STORELOG, one log file will be restored. If
multiple log files were stored with a single invocation of
STORELOG, all log files stored with that invocation will be
restored.
* ALLBASE/SQL prompts for a new file name for each file before
restoring the file. To avoid name conflicts, rename using
distinct file names that reflect the log sequence numbers.
* Rollforward recovery uses four commands:
* SETUPRECOVERY or SETUPRECOVERY PARTIAL--initiates the
process.
* RESTORELOG--restores one or more log files from a backup.
* RECOVERLOG--issued by you for each log file being applied
to the DBEnvironment.
* ENDRECOVERY--ends the rollforward recovery process.
* You normally apply SETUPRECOVERY or SETUPRECOVERY PARTIAL once.
When using SETUPRECOVERY you can specify a RecoverTime as the end
point for recovery. For SETUPRECOVERY PARTIAL you must recover
all the way up to the time of the failure. You then use
RESTORELOG to restore each backup log file to the system in
sequence number order, and you use RECOVERLOG once for each log
file that you have restored, to apply it to the DBEnvironment.
ALLBASE/SQL will recover the transactions in the file up to the
RecoverTime you specified, or up to the end of the file.
* Use ENDRECOVERY once after recovering all the log files you wish
to apply to the DBEnvironment. Normally, you do not use
ENDRECOVERY if you specified a RecoverTime in the SETUPRECOVERY
command.
* ENDRECOVERY will result in an error if you have not recovered
enough files to make the DBEnvironment consistent. If you used
STOREONLINE to do an online backup of the DBEnvironment, you must
recover starting from the First Log Sequence Number Needed for
Recovery up to and including the file that was active at the time
the last STOREONLINE command completed. If you did a static
backup of the DBEnvironment, you can recover as little or as much
of the log as you desire once you have restored the most recent
copy of the DBEnvironment.
* Normally, this command is used when recovering a DBEnvironment, in
which case the DBEnvironment is not in use while the command is
executed.
Authorization
Any user may execute this command.
Examples
Recovery of singly stored log file
>> setuprecovery
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Recover to: (mm/dd/yy/hh/mm/ss) (opt): Return
New Log Mode (Single/Dual) (opt): single
Enter New Log File Name(s) Separated by a Blank: newlg1
New Log File Size: 250
Setup Recovery (y/n)? y
Recovery Has Been Set Up.
Next Log Sequence Number is 1.
>> restorelog
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Input Device: TAPE
Local (y/n) (opt): y
Restore the Log File (y/n)? y
Log File 'lgn1' was Restored.
Rename 'lgn1' Log File To: lsn001
Log File 'lgn1' was Renamed to 'lsn001'.
>> recoverlog
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Next Log File To Recover: lsn001
Recover Log File (y/n)? y
Log File Recovered.
Next Possible Log Sequence Number is 2.
>> endrecovery
DBEnvironment Name: PartsDBE
Maintenance Word: Return
End Recovery (y/n)? y
Recovery Has Terminated.
Recovery of multiple log files stored with single invocation of STORELOG
>> setuprecovery
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Recover to: (mm/dd/yy/hh/mm/ss) (opt): Return
New Log Mode (Single/Dual) (opt): single
Enter New Log File Name(s) Separated by a Blank: newlg1
New Log File Size: 250
Setup Recovery (y/n)? y
Recovery Has Been Set Up.
Next Log Sequence Number is 1.
>> restorelog
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Input Device: TAPE
Local (y/n) (opt): y
Rename 'lgn1' Log File To: lsn001
Rename 'lgn2' Log File To: lsn002
Restore the Log File (y/n)? y
Log File 'lsn001' was Restored.
Log File 'lsn002' was Restored.
>> recoverlog
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Next Log File To Recover: lsn001
Recover Log File (y/n)? y
Log File Recovered.
Next Possible Log Sequence Number is 2.
>> recoverlog
DBEnvironment Name: PartsDBE
Maintenance Word: Return
Next Log File To Recover: lsn002
Recover Log File (y/n)? y
Log File Recovered.
Next Possible Log Sequence Number is 3.
>> endrecovery
DBEnvironment Name: PartsDBE
Maintenance Word: Return
End Recovery (y/n)? y
Recovery Has Terminated.