in-memory database

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in-memory database

Storing the contents of a database in main memory rather than on disk. Since memory (RAM) is considerably faster than a hard disk or even a solid state disk, complex decision support queries can be satisfied much more rapidly, and high-end computers can be configured with terabytes of memory. However, memory can fail due to power outages and component breakdown; therefore, snapshots are taken periodically and saved to permanent disk storage. See SAP HANA and RAM disk.

In Time, It Will Merge
At some point in the future, perhaps 10 or 20 years from now, main memory and disk storage will merge into one "memory/storage" pool as all storage will be addressable like DRAM memory but will be non-volatile. See future memory chips.
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Extensive worldwide interest in new main memory database technology has led the Hasso Plattner Institute (HPI) to offer a further open online course on this topic.
Main Memory Database Systems: An Overview, IEEE Trans.
Main memory database vendor TimesTen Performance Software Inc was at HP World last week demonstrating what it called "off the scale" performance using the newly shipping HP 9000 N Class servers.
McObject has ported its eXtremeDB(TM) main memory database to run on the OnCore OS(TM), an innovative real-time, MMU-protected operating system based upon a fully independent virtual memory architecture.
The course offers an introduction to the subject of the revolutionary main memory database technology known as In-Memory Data Management.
In this course, Plattner introduced the new main memory database technology researched at HPI and developed with SAP.
Meanwhile Angara Database Systems Inc, the main memory database company commercializing research work originally carried out at Stanford University, said its Angara Data Server is now generally available.
Prior to this, Phillips held the role of vice president of engineering at Angara E-Commerce Services, and was responsible for establishing and growing the engineering organization, as well as leading the efforts to transition the company's technologies from a conceptual main memory database product to a Web-based solution.
0 of its eXtremeDB small footprint, main memory database, with new features that improve developer flexibility and enhance the run-time capabilities of applications based on eXtremeDB.
But TimesTen is now facing direct competition from Palo Alto, California-based Angara Database Systems Inc, a main memory database company formed from a Stanford University research effort.
located in San Jose, California, develops and supports ultra high-speed main memory database products designed to work in conjunction with standard disk-based databases.
By using McObject's small footprint, main memory database at DaimlerChrysler's electronics plant in Huntsville, Alabama, the plant's manufacturing engineers expect to shorten development time while gaining performance, reliability and flexibility.