TAILIEUCHUNG - Solaris 9 System Administrator Exam phần 7

hoặc thiết bị sao lưu được xác định trong tập tin / etc / default / tar được sử dụng. Các tập tin hoặc thư mục được sao lưu được liệt kê như các đối số dòng lệnh sau khi các chức năng và tranh luận. | 14 Advanced Disk Management Terms You Need to Understand Virtual file systems Striping and concatenation Mirroring Redundant Arrays of Inexpensive Disks RAID Solaris Volume Manager Concepts You Need to Master Identifying RAID levels Identifying characteristics of RAID levels Understanding features of the Solaris Volume Manager 310 Chapter 14 Introduction This chapter describes some of the advantages of virtual disk management systems and briefly describes some of the techniques used by these systems to improve availability. These include duplexing mirroring logging and disk arrays. The features and key concepts of the virtual disk management system included with Solaris 9 the Solaris Volume Manager are described. Virtual File Systems Virtual disk management systems allow the use of physical disks in different ways that are not supported by the standard Solaris file systems. This section summarizes these advantages and describes several techniques used to provide virtual file systems. Advantages of Virtual Disk Management Systems A virtual disk management system can overcome disk capacity and architecture limitations and improve performance and availability. In addition manageability is enhanced by the use of a graphical management tool. The three main storage factors are performance availability and hardware costs. A virtual disk management system allows managing tradeoffs between these three factors and in some cases reduces the impact of these factors. Overcoming Disk Limitations Virtual disk management systems allow partitions on multiple disks to be combined and treated as a single partition. Not only does this allow file systems to be larger than the largest available physical disks it also allows the entire storage area on a physical disk to be used. Improved Performance Typically using multiple disks in place of a single disk will increase performance by spreading the load across several physical disks. Improved Availability Virtual disk management systems .

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