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Disk cache based virtual optical jukebox storage system replacement algorithm

A technology of virtual optical disc library and cache replacement, applied in computing, energy-saving computing, memory address/allocation/relocation, etc., can solve the problems of high difficulty of data migration, low data security, unsuitable for long-term storage, etc., to improve security. and reliability, low energy consumption and long service life

Inactive Publication Date: 2015-11-04
JIANGSU LANSWON TECH CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The traditional magnetic storage mode has disadvantages such as high energy consumption, short disk life, not suitable for long-term storage, low data security, and high difficulty in data migration; with the establishment of the Blu-ray Disc industry standard, Blu-ray Disc ushered in a period of rapid development

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  • Disk cache based virtual optical jukebox storage system replacement algorithm
  • Disk cache based virtual optical jukebox storage system replacement algorithm
  • Disk cache based virtual optical jukebox storage system replacement algorithm

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Embodiment Construction

[0013] The present invention according to figure 1 The system structure shown, figure 2 The workflow block diagram of the virtual optical disc library system and image 3 The replacement algorithm of the virtual optical library storage system based on the disk cache is combined with a new implementation scheme. The steps of the replacement algorithm of the virtual disc library storage system based on the disk cache are as follows:

[0014] (1), start to inquire about the file, assuming that the inquired file is the file f in the optical disc cd;

[0015] (2), search Q fre Queue, to determine whether the file f in the CD can be searched out;

[0016] (3), if f is in Q fre In the queue, put the cd where f is located in Q fre The front end of the queue returns the file f to the user;

[0017] (4), if in Q fre If f is not found in the queue, go to Q out Continue searching in the queue;

[0018] (5), if f is in Q out queue, cd from Q out removed from the queue and plac...

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Abstract

The invention discloses a disk cache based virtual optical jukebox storage system replacement algorithm. The algorithm simulates optical jukebox storage in a disk space and accesses the disk as optical discs, so that the disk replaces the optical discs to store data. The technology has the advantages that: 1, the algorithm overcomes the limitation of conventional optical disc storage, and hides multiple storage mediums, so that the operation time of physical equipment, such as mechanical arms, disk drivers, and so on, are omitted, and the data reading speed is greatly improved as composed with direct access to the optical discs; 2, the data is stored in optical discs or an optical jukebox via a virtual optical jukebox module, and the optical discs or the optical jukebox are kept off-line, so that even if the physical memory stack fails, the data of the whole physical storage system cannot be affected, therefore, the security and the reliability of the whole storage system can be improved; 3, the optical disc storage is free of high maintenance costs of a tape library and a disk array, and is low in energy consumption and long in service life, thereby greatly reducing the usage cost of a user.

Description

【Technical field】 [0001] This invention is a high-tech science and technology project, and the subject matter is a disk cache-based replacement algorithm applied to a virtual disc library storage system. 【Background technique】 [0002] With the advent of the era of big data, the total amount of global data has shown explosive growth. In 2013, the total amount of global data reached 3.5ZB, and the rapid growth rate is doubling every two years. Among such vast data, more than 80% belong to archive information. [0003] According to IDC research, the data storage industry will grow rapidly from 2013 to 2018. In 2015, the global storage product market totaled US$54.178 billion, and will grow at a compound annual rate of 20.68%. On the one hand, there is the rapid growth of global archive data, and on the other hand, the disadvantages of magnetic media storage represented by disk / tape are highlighted. Big data requires innovative storage media and storage systems. [0004] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/08G06F17/30
CPCY02D10/00
Inventor 严学道
Owner JIANGSU LANSWON TECH CO LTD