Database Management System - Product Comparison. Summary. For over 3. Raima has developed, sold and supported Raima Database Manager (RDM), a relational DBMS that runs in almost any computing environment, from mobile phones to embedded computers to UNIX servers to the Cloud. RDM is a fast, small footprint, inexpensive database engine, provided by Raima as an SDK for Windows, Linux or UNIX development environments. For embedded and mobile targets, RDM. Programmers use C, C++, Java, or C# to call a suite of APIs in RDM, or access it from 3rd party tools through the ODBC Driver Manager.
Get the latest national, international, and political news at USATODAY.com. RDM may be configured to run as a single process, single database program, or as a multi- computer, multi- process, multi- thread, multi- core, distributed database system of programs. And everything in between. Its SQL is ready for those who prefer SQL programming, but low- level API access is also available for advanced programmers who want to squeeze out the ultimate performance. For even greater performance, a database may be managed in- memory. ACID compliance means that on- disk databases are safe and always recoverable, while MVCC and non- repeatable- read features allow fast reading or analysis of databases that are being concurrently updated. Raima has always made the RDM source code available at a reasonable cost. Raima and its experienced developers are proud of this code and don. Source code comes complete with project files necessary for you to build it yourself. Since RDM can be freely downloaded and licensed for application development at a very low entry fee until it is ready to deploy, and with source code availability, there is very little cost difference between Raima. It maintains a cache of database objects as it responds to function calls from your program. The Transactional File Server – This tight, multi- user server interacts with one or more Runtime Libraries concurrently. It manages access to database files. You are currently offline, waiting for your internet to reconnect.The TFS responds to runtime requests to read objects, to lock objects, or to apply transactional changes. Runtime Library. As a re- entrant library, RDM fully supports multi- threaded applications. Each thread may open a database and operate on it concurrently with the others. As a linkable library, RDM operates on data kept in a heap- based cache. Its robust APIs give you full visibility and control over the data. SQL is available through a C- based API, but also accessible through 3rd party tools. Other APIs allow fine- tuning of database operations using a cursor view or an object- oriented view. Transactional File Server. At its core, the TFS is a library of functions. These functions are called by the runtime library. If the TFS is running in a separate process, its functions are called as RPCs (Remote Procedure Calls) using TCP/IP between computers and shared memory within the same computer. However, the TFS functions may be linked directly into your application also. This has significant performance benefits and simplicity in operation. It’s faster because the Remote Procedure Calls become Local Procedure Calls (in- process). It’s simpler because everything is running within your program and there is no separate process to start first. Configurations. Yes, the Runtime Library and TFS are powerful and well- defined, but they can be configured in several ways. The figures below show just a few. When multiple computers are involved, they communicate through TCP/IP. If the runtime and TFS are on the same computer, shared memory is used to speed it up. But when the runtime and TFS are in the same process, the inter- process communication is avoided, resulting in even more speed. Multi- threaded applications are great for handling multiple windows on a screen, each with independent contents. Simpler, single- user applications have an an advantage because there is no concurrent access to the database, hence no locking or waiting. Now, load the database from disk into memory and you have database management with all the stops pulled.
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