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嵌入式实时数据库-2
CENTURA 公司(原RAIMA公司)是嵌入式数据库软件方面的领先者。自1982年以来,RAIMA公司一直针对高性能的数据库开展工作,在建立快速和可靠的数据库方面取得了很大成绩。 AT&T、Anderson Consulting、IBM、DEC、Cabletron、SIMENS、Motorola......都是RAIMA公司的客户。
Specifications
centura RDM Database ManagerTM 5.0
Optimize Database Management with the Perfect Solution
Why Developers choose Centura’s RDM Database ManagerTM 5.0
² Utilizing a commercial embeddable DBM speeds development time; software developers can then concentrate on product rather than in-house database development.
² Reduce time to market; cut development costs and time by using a proven, state-of-the art solution.
² Reduce cost of support; Centura specializes in database technology and supports their products 100%
Centura RDM Key Features
² Maximize system space use with small footprint; Memory requirement is approximately 200 KB, but is can be higher or lower depending on the operating system and use of RDM features.
² Achieve low-level control with 150 C functions for complete database control.
² Manages a majority of C types including arrays and struts.
² Combine C API calls with C++ class library.
² Cross Platform design supports Windows NT, 2000, and 95/98,
Additional Features
² Maximize performance-minimize space requirements –by specifying page and cache size.
² Minimize disk I/O for fast database access with sophisticated cashing scheme.
² Achieve faster results with multi-threaded engine-RDM permits multiple threads of execution in the engine core on most platforms, which results in faster performance.
² Define RDM content and structure with DDL ( Database Definition Language).
² Support multiple users on most platforms with locking functions providing concurrent control and fast processing of lock requests.
² Ensure data integrity-in case of a system failure, the database updates are automatically regenerated from database transaction log.
² Sort and combine multiple fields with a single compound Key.
² Open multiple databases simultaneously.
² Support local –area networks ( LANS),
² Record changes by each successive user with RDM’s timestamp system, which writes a group of related database updates as a unit to a transaction log file and then to the database.
Additional Features (con’t.)
² Access Data quickly-RDM supports convenient relational indexed navigation, direct physical record access model and physical disk order retrieval, All three retrieval methods can be used simultaneously.
² Allow the use of native Unicode strings and international character sets on platforms that provide Unicode data types and functions.
² Enjoy ease of use with Award-Winning documentation.
Database Specifications
Maximum Databases Open Simultaneously: limited only by computer memory
Maximum Fields Per record: limited only by maximum record size and available memory
Maximum Key Size: 242 Bytes
Maximum Objects Per Database: 4,294,967,040
Maximum Objects Per File:16,777,215
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关键词: 嵌入式 实时 数据库
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