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The worst possible stuffing ratio would be 1 frame in 2, as this gives a theoretical 0.5 bit of jitter. Therefore, the stuffing ratio is carefully chosen to give theoretical minimum jitter. In a practical system however, the actual decision to stuff or not may be made by comparing the read address and write address of the input buffer store.
The MKDE model allows for different database backends to be plugged into Pervasive's product. Btrieve is not a relational database management system (RDBMS). Early descriptions of Btrieve referred to it as a record manager (though Pervasive initially used the term navigational database but later changed this to transactional database) because it only deals with the underlying record creation ...
Superbase is an end-user desktop database program that started on the Commodore 64 and was ported from that to various operating systems over the course of more than 20 years. It also has generally included a programming language to automate database-oriented tasks, and with later versions included WYSIWYG form and report designers as well as ...
4D (4th Dimension, or Silver Surfer, as it was known during early development) is a relational database management system and integrated development environment developed by Laurent Ribardière. [ 3 ] 4D was created in 1984 [ 4 ] and had a slightly delayed public release for Macintosh in 1987 [ 5 ] [ 6 ] [ 7 ] with its own programming language .
dBase's database system was one of the first to provide a header section for describing the structure of the data in the file. [ citation needed ] This meant that the program no longer required advance knowledge of the data structure, but rather could ask the data file how it was structured.
PDH may refer to: Angiotensin-converting enzyme, an enzyme; Plesiochronous digital hierarchy, in telecommunications networks; Pound–Drever–Hall technique for stabilizing a laser's output; Pyranose dehydrogenase (acceptor), an enzyme; Pyruvate dehydrogenase, an enzyme
The name is a three-letter acronym for DataBase Manager, and can also refer to the family of database engines with APIs and features derived from the original dbm. The dbm library stores arbitrary data by use of a single key (a primary key ) in fixed-size buckets and uses hashing techniques to enable fast retrieval of the data by key.
Most former modern computing architectures had a 32-bit memory address space, imposing a hard limit of 4 GB on the size of any database that directly mapped into a single-level store. However, today's 64-bit processors now mostly implement 48-bit address spaces, giving access to 47-bit addresses or 128 TB of database size, [ 6 ] making ...