System Administrator Guide : 2. Understanding Vector Components : Logging and Locking Systems
 
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Logging and Locking Systems
The logging and locking systems coordinate the locking, recovery, and journaling of the Ingres catalogs and table components of Vector databases. The system is composed of the following components:
Lock manager
Logging facility
Recovery process
Archiver process
Log files
Log Files
Vector maintains several log files to which it writes information about the installation activities. The various log files are:
X100 Write-ahead Log (WAL), which is the X100 transaction log
Ingres Transaction Log File
X100 Error Log (vectorwise.log)
DBMS Error log (error.log)
Archiver Log
Recovery Log
Primary Configuration Log Files
Operational Configuration Log Files
Optional Log Files
For more information on these files, see Log Files.