Home
AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
Backup and Restore GuideThe HCL OneDB™ Backup and Restore Guide describes how to use the HCL® OneDB® ON-Bar and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
ontape backup and restore system
Configure ontapeYou configure the ontape utility by setting configuration parameters for backups of storage spaces and logical logs.
Set configuration parameters for the ontape utilityThe ontape utility uses eight configuration parameters in the onconfig file. Two of the configuration parameters specify filter programs for transforming data during backup and restore; the other six are used to create storage-space and logical-log backups.
Specify the tape sizeUse the TAPESIZE and LTAPESIZE configuration parameter parameters to specify the maximum amount of data that you can write to a tape.
Tape size for remote devicesYou can estimate the amount of continuous logical-log backup data that can be stored on tape on remote devices.

Tape size for remote devices

You can estimate the amount of continuous logical-log backup data that can be stored on tape on remote devices.

When you perform a continuous logical-log backup to a remote device, the amount of data written to the tape is the smaller of LTAPESIZE and the following formula:

(sum of space occupied by all logical-log files on disk) - 
(largest logical-log file)

The I/O to the remote device completes and the database server frees the logical-log files before a log-full condition occurs.

Restriction: You cannot set tape size to 0 for remote devices.