A user command called when an abnormality is detected using operating system/server heartbeat monitoring in database multiplexing mode.
A command that is executed from the client machine and used. Also known as a client application.
The replication operation to continue without knowing where the application is connected.
The Connection Manager feature improves the availability.
The database storage area on the database storage disk. Database clusters are a collection of databases managed by an instance.
A feature that can change the returned data for queries generated by applications, to prevent exposing actual data.
Mechanism in which a database is made redundant on multiple servers, by transferring transaction logs (WAL) via the network to enable application jobs to be continued.
A process that isolates a database server with an unstable status from the cluster system in database multiplexing mode. This process is implemented as a fencing command.
The Global Meta Cache feature cache the informations about system catalogs information (catalog meta cache) in shared memory. The catalog meta cache on shared memory is called the Global Meta Cache (GMC).
The OS user account that owns the database cluster files and operates the database server processes.
The ability to limit the size by removing the Local Meta Cache that has not been accessed for a long time.
Local Meta Cache is a meta cache (system catalog and table definition information) held in local memory.
A method of changing data under specific conditions when it is returned for a query from an application. You can configure masking target, masking type, masking condition and masking format.
The log that mirrors the transaction log at the backup data storage destination.
Mirroring Controller arbitration process
A process that performs arbitration and fencing on the arbitration server.
Mirroring Controller monitoring process
A process that performs heartbeat monitoring of the Mirroring Controller process. If the Mirroring Controller process returns no response or is down, the Mirroring Controller monitoring process is restarted automatically.
A process that performs operating system/server and process heartbeat monitoring and disk abnormality monitoring between database servers. Additionally, the process issues arbitration requests to the arbitration server and executes arbitration commands.
The connection pooling feature of Pgpool-II supported by FUJITSU Enterprise Postgres.
This feature maintains the connection established with the database server and reuses that connection each time a new connection with the same properties (user name, database, and protocol version) arrives. By reducing the connection overhead for the database server, throughput of the whole system is improved.
The automatic failover feature of Pgpool-II supported by FUJITSU Enterprise Postgres.
If any of the database servers crashes or can no longer be reached, this feature disconnects the server and continues operation on the remaining servers. The streaming replication feature of PostgreSQL is combined with Pgpool-II to achieve a high-availability system.
The load balancing feature of Pgpool-II supported by FUJITSU Enterprise Postgres.
This feature distributes reference queries to multiple database servers, improving throughput of the whole system. The database multiplexing feature or PostgreSQL streaming replication feature is combined with Pgpool-II to reduce the load on the database server.
A server for using the failover, connection pooling, and load balancing features of Pgpool-II. It is a dedicated server that has a server program installed for using these features.
The server that processes the main database jobs during multiplexed database operation.
A feature that objectively determines the status of database servers as a third party, and if necessary, isolates affected databases if the database servers are unable to accurately ascertain their mutual statuses in database multiplexing mode, such as due to a network error between database servers, or server instability.
A server that generates a replicated database synchronized with the primary server, and that can run as an alternative server in case the primary server fails during multiplexed database operation.
A user command called when Mirroring Controller performs a state transition of a database server in database multiplexing mode. State transition commands include the post-switch command, pre-detach command, and post-attach command.
Contains the history of updates made to the database by transactions. Also known as the WAL (Write-Ahead Log).
A GUI-based program installed on a database server or a dedicated WebAdmin server, used to manage database instances.