sequential access


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sequential access

[si′kwen·chəl ′ak‚ses]
(computer science)
A process that involves reading or writing data serially and, by extension, a data-recording medium that must be read serially, as a magnetic tape.
References in periodicals archive ?
Caption: FIGURE 6: The file reading time in sequential access.
A virtual object contains the worst values seen in each sequential access. For each seen object, the algorithm performs random access for retrieving unseen values and compares pair-wise the seen objects versus the updated virtual object.
We modify the transaction data for R1 and R2 from the respective examples by making the first two transactions as insert / deletes and the next two transactions as sequential access transactions.
Disk libraries leverage the random-access nature of disk compared with the sequential access nature of tape.
Xbridge Host Data Connect enables Windows(r), Web and mobile applications to quickly and securely access virtually all OS/390(r) and z/OS(tm) mainframe data including Virtual Storage Access Method (VSAM), Queued Sequential Access Method (QSAM), DataBase 2 (DB2) and IMS DB, and to see the data in the format of the requesting application (e.g., Excel), all in real time and without programming.
The AT45DB1228 is a 128-Mbit 2.7V, sequential access Flash memory device that features a 40MHz Rapids[TM] serial interface with SPI compatibility and a 20 MHz Rapid8[TM] 8-bit interface.
Some history is in order: The IT shop probably started life on the mainframe, using esoteric formats and languages such as VSAM (Virtual Storage Access Method), QSAM (Queued Sequential Access Method) and COBOL (Common Business Oriented Language).
Specifically, VSAM (Virtual Storage Access Method), QSAM (Queued Sequential Access Method) and Database 2 (DB2) data can be accessed -- on demand -- through intranets, extranets or the Internet, without requiring additional IT resources.
Taken together, these results favour a model of parallel rather than sequential access and suggest some degree of independence in the access to personal semantics and names.
Here, it can be seen that a strictly sequential access pattern will result in a cache miss for every other cache block when the prefetch-on-miss algorithm is used but this same access pattern results in only one cache miss when employing a tagged prefetch algorithm.

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