Both of these tools use the same algorithm?

Database (TimesTen) in memory of Oracle and Oracle coherence they use the same algorithm?
Two of them are databases in memory?
Otherwise, what is the difference?

Published by: qck on August 11, 2009 20:17

No, they are different tools, and they use different algorithm.

Oracle TimesTen in-memory database is a relational database memory-resident. Deployed in the application as a layer
embedded database, the Oracle TimesTen database in memory works on databases that fit completely in the physical memory using the standard SQL interfaces.
Oracle TimesTen in memory
Database libraries are integrated into the applications, eliminating the unnecessary context switching and operation of the network, further improve the performance.
Database in Oracle TimesTen (TimesTen) memory is designed knowing that the data reside in main memory and can take more direct to roads
data, reducing the length of the path of the code and simplifying algorithms and structure.

Oracle coherence is a grid in memory of the distributed data JCache compatible for clustered applications and application servers. Organizations fits predictable critical applications using Oracle coherence to provide fast and reliable access to frequently used data. The Oracle coherence allows customers to send data more closely to the demand for faster access and greater use of resources. By automatically and dynamically partitioning data in memory on multiple servers, Oracle coherence enables continuous data availability and transactional integrity, even in the case of a server crash. Oracle coherence is a shared infrastructure that combines the locality of data with local processing power to perform the analysis of real-time data, calculations of grid in memory and parallel transaction and event processing.

In my view, the coherence of the Oracle is more powerful. It is mostly co-located on multiple server memories. It is not only for databases (including with the Hibernate or TopLink), but also for other applications.

Published by: jetq on August 11, 2009 23:20

Tags: Database

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