Data access scheme with simplified fast data writing

Details Data access scheme with simplified fast data writing Data access scheme with simplified fast data writing

1994-12-28

1997-02-04

Nguyen, Viet Q.

Static information storage and retrieval

Read/write circuit

36518905, 395474, 395479, 395404, G06F 1300

Patent

active

056005962

ABSTRACT:
A data access scheme for realizing a fast data writing into the secondary memory device. For a plurality of data present in a plurality of blocks provided in a secondary memory device, one of a plurality of blocks is selected as a writing block, each updated data is written into a region in the primary memory device corresponding to an invalid data portion in the selected writing block, and the writing block with each updated written is stored from the primary memory device into the secondary memory device. Here, an index having a data entry for each data which records an identifier of each data and a data position of each data in the secondary memory device can be provided such that each updated data is written into another position in the primary memory device different from a position of each data in the secondary memory device before an updating of each data, and the updating of each data is validated by changing the data position of each data recorded in the data entry in the index to that another position at which each updated data is written while the writing block is stored into the secondary memory device.

REFERENCES:
patent: 5170466 (1992-12-01), Rogan et al.
patent: 5313585 (1994-05-01), Jeffries et al.
Rosenblum et al., "The Design and Implementation of a Log-Structured File System", Proceedings of the 13th ACM, (1991), pp. 1-15.

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