What are the VLDB File Types?

Database files
<database>.dbd
Database dictionary file - Contains the record, field, and other database definitions.

<database>.00X
Data files - Contain occurrences of one or more record types.
Key files û Contain specifications for one or more key fields.

catalog.* - Catalog database to keep track of all the information about databases accessible from the Velocis applications.

systcat.* - The syscat database contains database definition and security information, compiled views, and stored procedures.

rdm.chi û When the server cycles to a new change log, it stores the new name in the change log indicator file (rdm.chi) and removes the name later when shutting down.

rxxxxxxx.chg û Velocis uses a change log to record each change made to a database during a transaction. A complete change log is the logical concatenation of all change log files written since the last backup. Using a process called ôchange log cyclingö the server uses a new change log file when the current one reaches the maximum size (default 2,000,000 bytes) set by the MaxChangeLogSize configuration parameter found in velocis.ini.

rdm.chk û Velocis triggers a checkpoint when the total amount of modified database pages to be written from the database cache exceeds the size of the checkpoint buffer, or if the number of modified pages in the cache exceeds the CheckPoingThreshold percentage.

Velocis.ini û Velocis.ini keeps the server configuration parameters.

RDS.log û Contains an image of the console log. This file is used to store server informational and error messages.

RDS.bak û Contains old rds.log data.