An LCR copy is used for disaster recovery because you can

 

switch to the LCR copy in a few seconds. If an LCR copy is used

 

for backup and if it is located on a different disk than the original

 

data, then the I/O load on a production database is minimal.

 

A replicated storage group is represented as a new instance of

 

Exchange writer called Exchange Replication Service and can

 

be backed up (using VSS) as a normal storage group.

 

See also cluster continuous replication and Exchange Replication

 

Service.

lock name

You can configure the same physical device several times with

 

different characteristics, by using different device names. The

 

lock name is a user specified string that is used for locking all

 

such device configurations to prevent collision if several such

 

devices (device names) are used concurrently. Use an identical

 

lock name for all device definitions which use the same physical

 

device.

log_full shell script

(Informix Server UNIX specific term) A script provided by ON-Bar

 

that you can use to start backing up logical log files when

 

Informix Server issues a logfull event alarm. The Informix Server

 

ALARMPROGRAM configuration parameter defaults to the

 

INFORMIXDIR/etc/log_full.sh, where INFORMIXDIR

 

is the Informix Server home directory. If you do not want logical

 

logs to be backed up continuously, set the ALARMPROGRAM

 

configuration parameter to INFORMIXDIR/etc/no_log.sh.

logging level

The logging level determines the amount of details on files and

 

directories written to the IDB during backup, object copying, or

 

object consolidation. You can always restore your data,

 

regardless of the logging level used during backup. Data

 

Protector provides four logging levels: Log All, Log Directories,

 

Log Files, and No Log. The different logging level settings

 

influence the IDB growth, backup speed, and the convenience

 

of browsing data for restore.

logical-log files

This applies to online database backup. Logical-log files are

 

files in which modified data is first stored before being flushed

 

to disk. In the event of a failure, these logical-log files are used

 

to roll forward all transactions that have been committed as well

 

as roll back any transactions that have not been committed.

372Glossary