With the continuous development of computer information technology, it brings opportunities and challenges to digital construction. At the same time, new computing models and information sharing methods are maturing, more and more key information is transformed into data, and the amount of data demanded and generated is exploding, and the value of data to individuals and enterprises is increasing; data The forms are increasingly diverse, and multimedia data such as images, audio, and video further exacerbate the expansion of storage content. People put forward storage system access performance, storage cost, system scalability, high reliability, and 7x24-hour data availability. An urgent need. For these storage needs, designing massive data storage systems with high data transmission rate, reliable data storage and backup, intelligent data organization and management has gradually become a hot issue of digital information storage.
The continuous development of optical storage technology makes optical disc storage an ideal choice for digital information storage. The optical disc has the advantages of high recording density, large storage capacity, long service life, and high data transmission rate. According to the structure of the optical disc, the optical disc is mainly classified into several types of CD, DVD, and BD. The optical disc library is an optical disc changer that can store tens to more than 10,000 discs with a robot and one or more optical disc drives. It uses a robot to select a disc from the cabinet and send it to the drive for reading. write. The storage mode is characterized by simple installation, convenient use, support for common network operating systems and various common communication protocols, strong information processing capability, and easy maintenance and management.
Compared with other traditional storage tools, the intelligent optical disc library has three obvious advantages: First, the data information stored on the optical disc cannot be changed, which is more suitable for archival storage requirements, and also meets the requirements for near-line and offline storage; second, the medium Universality and interchangeability, can greatly expand the cost-effective storage space, the optical disc library can also be cascaded to meet the needs of greater storage capacity; third, from the environmental requirements, system management and other possible data loss In view of the fact, the operating and maintenance costs of the optical disc library are relatively low, and it is also an ideal choice for big data storage centers.
Tongfang CD-ROM is based on the National Engineering Research Center of Tsinghua University CD-ROM, and participated in the development of the DA/T38-2008 standard implemented by the National Archives in 2008, and developed and manufactured the supporting "File-level CD-ROM" and "Archived Disc Detection" for the standard. """ and "archive disc data security monitoring management software" and other products. These products have passed the appraisal of the National Archives Project Expert Group, and the product certification guarantee is provided by the CD-ROM Protection Technology Joint Laboratory jointly established by the CD-ROM National Engineering Research Center and the National Archives Bureau. Tsinghua Tongfang Intelligent Optical Disk Library is such a product.
Figure 1: Block diagram of the modular system of Tsinghua Tongfang Intelligent CD Library
Figure 2: Tsinghua Tongfang Intelligent CD Library Application Network Topology
Figure 3: Topology structure of the Tsinghua Tongfang Intelligent Optical Disk Library NAS system
Tsinghua Tongfang Intelligent CD-ROM library contains the processing link, data acceptance, post-data preservation, data periodic inspection, data migration, etc., interlocking, layer-by-layer. Widely used in the judicial, defense, aerospace, colleges, archives, banking, insurance, securities, petrochemical, technology, film and television, media, publishing, education and other industries. At present, there are many models such as TH1035/TH2105/TH3350/TH3560/TH5175 to meet the needs of different users.
Matting Agent
Matting Agent the basis materials is
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