Logging Facility
Each installation has an installation-wide transaction log file that keeps track of all transactions for all users. The log file can be distributed among up to sixteen partitions (locations), although the files are treated as one logical file.
With dual logging enabled, the installation has an alternate log file. With dual logging, a media failure on one of the logs does not result in the loss of data or the interruption of service. If one of the log file disks fail, the logging system automatically switches to the other log without interrupting the application.
When log files are properly configured, the use of dual logging has a negligible impact on system performance.
Note: If your system is configured for Actian X Cluster Solution, each node in the Actian X cluster maintains a separate Archiver and Recovery error log. Each log is distinguished by having _nodename appended to the base log name, where nodename is the Actian X node name for the host machine as returned by iipmhost. Dual logging is also provided on clusters.
In addition to the installation-wide log file, every database that has X100 tables has its own wal directory. The wal directory files contain an up-to-date representation of the memory structures required for database recovery.
Last modified date: 08/14/2024