Which ones do you know about network storage technology?
All storage, server, and network resources are virtualized as a resource pool and treated as shared resources. This resource pool is the storage grid. The key to the storage grid is virtualization and uniformity management.
The storage grid can be applied to both SAN and NAS environments. It provides fast and simple upgradeability to capacity, performance, quality of service, and / or connection agreements, and enables unified viewing and management of all company data Far beyond the current limited virtualization implementation, it can also optimize the performance of distributed enterprise remote data access. The storage grid architecture can achieve tighter application integration between the database and the enterprise, provide higher data protection, and manage data resources more easily based on relevant regulations. These advantages greatly reduce the user's cost when purchasing, expanding and managing.
The object storage model combines the characteristics of NAS and SAN structures. Storage objects have the advantages of both files and blocks: they are directly accessed on storage devices like data blocks, and through an object interface, like files, on different operating system platforms Realize data sharing. In a SAN, the location logic and file system are located in the host. In object-oriented storage, storage space no longer needs to be managed by the file system running on the host, but is managed and allocated by the storage system itself.
A storage object is a collection of logical bytes about a storage device. It has storage methods, data attributes, and storage security policies. Therefore, the object storage system has greatly improved in terms of file-level data layout, flexibility of service quality, and manageability. In addition, the most direct effect of object-based storage is to strip space management from storage applications. As shown in Figure 2, storage devices have self-management features, including reorganizing data to improve performance, invoking rule backup and failure recovery.
The characteristics of future storage devices may include self-configuration, self-protection, self-optimization, self-recovery, and self-management. Replacing block interfaces with objects is a development direction. At present, object-oriented storage is still in the formulation of standards and has not been widely accepted.
Content Addressable Storage CAS
Content Addressed Storage (CAS) is a network storage technology for fixed content storage needs. CAS has object-oriented storage characteristics, based on magnetic recording technology, it is addressed according to the digital fingerprint of the stored data content, and has good searchability, security, reliability and scalability. The representative product of CAS storage technology is EMC's Centera system, which currently has many limitations.
The database is only for structured data, and a large amount of unstructured data management has greater storage requirements, and the content management object is mainly based on various types of unstructured data digital content. The emergence of CAS technology makes unstructured data management (including the filing and query of various documents, reports, bills, web pages, pictures, faxes, scanned images, and a large number of multimedia audio, video information, etc.) of the enterprise become the new Hot spot. In the future, a new content management-based storage system platform is needed, which extends the latest object storage architecture, supports object warehousing and federal database technology, supports relational and XML as the main data model, and tightly integrates content management services, Workflow, messaging, analysis, and other enterprise application services.
InfiniBand (IB) is a new architecture proposed for the data flow between the processor and intelligent I / O devices, which is used to replace the PCI bus in the server. Using IB technology to support multi-processor clusters will allow the server to provide higher bandwidth and expandability, and enhance the flexibility of storage device expansion, and is used to support remote I / O and remote storage, as shown in Figure 3. As a connection solution that can provide low latency and high bandwidth between the system and storage, IB has been accepted by some users, and it is expected that IB-based storage will have a place in the storage field.
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