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Database Reliability
This section describes database reliability, including backup and restoration and the overflow dump mechanism.
Backup and Restoration
The Backup and Restoration function enables fast restoration following system errors.
The eSight enables users to customize backup policies and manually backup and restore data. Data that can be backed up includes configuration files and database data. Full system backup is supported during upgrades and the backups include system running directories and database data. You can set the period and storage path for periodic backup. The database can be backed up to a local or remote server.
Database Overflow Dump
To avoid insufficient security management tablespace of the database, the eSight provides the log overflow dump function. Database Overflow Dump include log overflow dump rule and alarm overflow dump rule.
- If the usage exceeds the threshold, eSight dumps early audit logs or alarms to a preset path by logging month or alarm reporting month, and deletes the data from the database until the usage is below the threshold. The audit logs include security logs, system logs, and operation logs. The alarms include historical alarms, masked alarms, masked events, and event list data.
- The eSight periodically dumps data that is stored for longer than the maximum storage duration (the duration is configurable) to a file in the preset directory and deletes data from the database.
- If the total size of dump files or the retention period exceeds the preset threshold, the eSight deletes the earliest dump files until the total size is below the threshold.