This is a repackaged software wherein additional charges apply for Round-the-Clock support with a guaranteed 24-Hour response time. 

cloudimg presents this Firebird SQL on Ubuntu Server 20.04 image preinstalled with system components such as Aliyun CLI & Python 3. A comprehensive user guide can be found in the User Guide section of this listing. 

Firebird is an open-source, SQL relational database management system based on the open source edition of InterBase released by Borland Software Corp, formerly known as Inprise Corp. Developed in C and C++, Firebird supports major hardware and software platforms including Windows, Linux, and Mac OS X. Firebird offers many ANSI SQL standard features, allows simultaneous OLTP and OLAP operations through its multi-generational architecture, and supports stored procedures and triggers.

Firebird uses a multi-generational architecture, also known as multi-version concurrency control, which uses record versions instead of read/write locks and transaction logs to provide external concurrency and consistency. Firebird keeps the preceding version of every modified record is kept as long as it is needed by at least one transaction. Each record version is signed by the transaction which created it, and each transaction knows what other transactions are currently active.

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