wsrep-enabled MySQL (previously MySQL/Galera cluster) can use wsrep replication providers, such as Galera, to form a cluster. wsrep API is an abstract replication interface that supports global transaction ID, true multi-master capability, conflict detection and resolution, and parallel applying and is transparent to triggers, stored procedures, and functions by replicating only final transaction results. Only the InnoDB storage engine and DDL commands are supported by this patch.
SELTA@Etersoft enables programs that store data in MS SQL Server to work with PostgreSQL. It translates SQL queries from the T-SQL dialect (used in MS SQL Server) to pl/pqSQL (used by PostgreSQL). Though SELTA@Etersoft is universal, it needs improvement to support concrete applications. At the moment, the translator is oriented to the popular Russian accounting system «1С:Предприятие 7.7». If your application can store data only in MS SQL, and you want it to be compatible with PostrgreSQL, support for your application can be implemented.
InfinityDB is an all-Java B+Tree database engine that is embeddable in the smallest to the largest applications that run on hand held devices, workstations, servers, or in distributed systems. InfinityDB provides a data integrity guarantee through all non-media failures, provides a simple API with only a few basic methods, and requires no administrative support. Version 2 offers full ACID transactionality without a log and with fine-grained locks. Programmers can easily superimpose their own data model or employ the Entity-Attribute-Value model by direct low-level access. The basic engine provides multi-valued or set attributes, all primitive Java types, unlimited Large Objects, heterogenous values, composite keys (Entities) and values, and unlimited sparse attributes, all extensible in-place with no schema changes.
SpiderDB is a lightweight database schema crawler library developed using Java. It is a simple library that can be used to Crawler the underlying schema of a database and return POJO objects, which makes it very easy to use. This library takes care of all the differences among the various database management systems, and makes application code free from the DBMS differences.You keep using same POJOs even if you change the underlying DBMS.
CUBRID is a comprehensive relational database management system highly optimized for Web applications. CUBRID is fast and powerful. Its multi-process architecture and its multi-threaded server implementation scale very well as the data and the number of users grow. CUBRID has optimizations such as Click Counter feature and Fast Concurrent Insertions, which are designed for Web applications' high workloads. CUBRID is a reliable and feature-rich DBMS. The high availability (HA) and replication features can help you provide non-stop service. Query plan caching and query result caching allow your application to serve read-mostly queries with minimal server resource usage. It supports unlimited databases. As a relational database system, CUBRID provides seamless transactions even for your high-volume databases, regardless of the number and the size of your databases or tables.
Maatkit is a toolkit for users, developers, and administrators of open-source databases. It is high-quality, formally tested software that is well documented and has an active open-source developer community. It has some unusual goals: all tools are standalone, with minimal dependencies and no need for installation. Documentation is embedded in the tools themselves. There are many other nice attributes, too. Most of Maatkit’s functionality is designed for MySQL. It makes MySQL easier and safer to manage. It provides simple, predictable ways to do things you cannot otherwise do. You can use Maatkit to prove replication is working correctly, fix corrupted data, automate repetitive tasks, speed up your servers, and much more. In addition to MySQL, there is support for PostgreSQL, Memcached, and a growing variety of other databases and technologies.