TCO has been cut in half because of fewer licenses and integration middlewares for service operation.

24/7 uninterrupted operation and 99.999% high availability were the key reasons in its choice of database.

Use Case: Traffic Signal Control System

Current Customer: Seoul Transportation Corporation

Industry: Public

Who

Seoul Transportation Corporation is a public entity responsible for the city’s subway transit. The daily average number of subway transit passengers operated by the entity is 6.8 million vs. New York (5.6 million) & Paris (4.2 million). It has a total subway length of 300 km, making it the fourth-longest in the world.

Problem

The corporation was in the process of overhauling its subway traffic system with a view to improving the safety and the ability to better act on emergency situations. The corporation looked for a database that could meet the following requirements:

Since subway traffic facilities should not tolerate any system disruption/failure, they should be supported by databases with the highest degree of product stability

24/7 uninterrupted operation and 99.999% high availability

Even in the event of the system going down abnormally, all data should be automatically saved and protected.

Data should be collected and stored in real time so that prompt actions can be taken in case of system abnormalities/failures.

The database should provide and adhere to strict technical SLAs.

The database should have a track record of having been deployed for other mission-critical applications.

The database should be relational as all of the corporation’s systems are built on relational DBMSs.

The database costs should be within its IT budget.

Solution

In 2018, the corporation chose Altibase after a series of BMTs of various databases.

Altibase’s previous deployments in other subway traffic systems was a major appeal.

Altibase’s in-memory capabilities allow for real time data collection and analysis.

Using Altibase’s move technology, data is stored on disk when it becomes stale and historical.

Database induced system downtime has been eliminated with Altibase’s HA and disaster recovery solutions that have features of in-memory based real time replication for synchronous/asynchronous data duplication and in-memory based real time backup and recovery.

Altibase’s pricing met the corporation’s budget requirement.

Altibase provides hybrid partitioned tables that can manage a large set of data log while simultaneously ensuring high performance.

Results

Altibase has a demonstrated history of providing glitch-free operation in the past 10 years in all subway traffic signal control systems it has served.

Altibase’s active-active and active-standby replication function allow for stable and interruption-free operation through data duplication in the event of any system failure/outage.

The corporation is now able to back up its data through Altibase’s checkpoint image file and redo log file.

Data loss could be prevented via Altibase’s durability assurance even with an abnormal DBMS shutdown.

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