Weak fingerprint repeated data deletion mechanism based on flash memory solid-state disk
A technology of data deduplication and solid-state disk, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the performance bottleneck of deduplication system solid-state disk, uncalculated M fingerprint value, sacrifice deduplication rate and other issues, to achieve the effects of improving life and space utilization, fewer weak fingerprint digits, and lower fingerprint calculation overhead
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[0032] figure 1 It is a schematic diagram of the principle of data deduplication, including data block, calculation of fingerprint value, query index table, deletion of duplicate blocks and storage of unique blocks.
[0033] figure 2 It is a schematic diagram of the principle of the pre-hash deduplication mechanism, including the calculation of weak fingerprints and the calculation of SHA-1 fingerprints. In the figure, three identical data blocks M are continuously written, and the second M cannot be deleted.
[0034] image 3It is a structural diagram of the weak fingerprint deduplication mechanism based on the flash memory solid state disk used in the present invention, and the weak fingerprint deduplication mechanism is implemented in the flash translation layer (Flash Translation Layer) inside the solid state disk.
[0035] Figure 4 It is a schematic diagram of the principle of the weak fingerprint deduplication mechanism. The specific execution process is:
[0036]...
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