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.