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IBM solidDB is a relational database server that combines the high performance of in-memory tables with the nearly unlimited capacity of disk-based tables.
Pure in-memory databases are fast, but strictly limited by the size of memory. Pure disk-based databases allow nearly unlimited amounts of storage, but their performance is dominated by disk access. Even if the computer has enough memory to store the entire database in memory buffers, database servers that are designed for disk-based tables can be slow because the data structures that are optimal for disk-based tables are far from being optimal for in-memory tables. The solidDB solution is to provide a single hybrid database server that contains two optimized engines inside it:
Both engines coexist inside the same server process, and a single SQL statement can access data from both engines.
Java DB is a relational database management system (RDBMS). Data is stored and queried via SQL or JDBC. Like other RDBMSs, Java DB can also be accessed through a persistence layer such as JPA, Hibernate, or JDO. Java objects can be stored in the columns of Java DB tables.
IBM solidDB is ranked 30th in Relational Databases while Oracle Java DB is ranked 18th in Relational Databases with 4 reviews. IBM solidDB is rated 0.0, while Oracle Java DB is rated 8.2. On the other hand, the top reviewer of Oracle Java DB writes "A relational database management system that's very clever and object-oriented". IBM solidDB is most compared with SQL Server, MySQL and IBM Db2 Database, whereas Oracle Java DB is most compared with MySQL, SQL Server, Apache Derby, Oracle Database and SAP HANA.
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