3.2

Table Of Contents
Creating and Restoring Database Backups
53
Restoring Archived Log Files
In Interplay version 1.6 and later, the Interplay Engine compresses and archives log files older
than 7 days. The log compression process runs during project backup. (This process runs at most
once per day, even if multiple backups are scheduled on the same day.) Archive files (with the
extensions .bar and .bin) are stored in the same directory as the log files for 30 days and then are
automatically deleted. You can extract the compressed log files from an archive by using the
BackupArchive tool described in
“Using the BackupArchive Tool to Restore Files” on page 50.
Performing a Partial Restore of an Interplay Production Database
Interplay Administrator v3.0 introduces a new option to the InterplayRestore tool that lets you
select an incremental backup to use for the restore process, without restoring the complete
database. Restoring from one or more incremental backups is referred to as a partial restore.
Prior to this release, the InterplayRestore tool always restored the complete database, even if you
selected to restore from an incremental backup. Performing a partial restore can save a
significant amount of time, depending on the size of the database.
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See the Interplay Engine and Interplay Archive Engine Administration Guide for complete
information about backing up and restoring.
When to Perform a Partial Restore
One example of an effective use of a partial restore is if a facility is replacing its Interplay Engine
with a new server. This is often a gradual process that takes several days. For example, you might
create a database on a new server by performing a complete restore of the existing database on
Monday. You test the system on Tuesday. If all goes well, you perform a partial restore on
Wednesday to add changes that took place in the database since the last complete backup, and
then bring the new server on line.
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Make sure you have performed a full restore of the last complete backup before you
perform a partial restore. A partial restore only restores incremental changes since the last
complete backup.
Selecting from the Backup Chain
When you run the InterplayRestore tool in interactive mode (without command line options), and
select a backup to restore, a backup chain of files is displayed. The backup chain is determined
by the backup you selected to restore. In the following example, you select incremental backup
entry 3. The backup chain lists the last full backup and any subsequent incremental backups.
[1] 04 February 2013 16:00:00 full
[2] 05 February 2013 16:00:00 incremental
[3] 06 February 2013 16:00:00 incremental