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Secondary storage structure

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  • (bq) part 2 book "operating system concept" has contents: file system, implementing file systems, secondary storage structure, system protection, system security, distributed operating systems, distributed file systems, distributed synchrozination, real time systems, multimedia systems, the linux system,... and other contents.

    pdf550p bautroibinhyen20 06-03-2017 23 5   Download

  • Module 13 - Secondary storage structure. In this chapter we describe the internal data structures and algorithms used by the operating system to implement this interface. We also discuss the lowest level of the file system the secondary storage structure. We first describe disk-head-scheduling algorithms. Next we discuss disk formatting and management of boot blocks, damaged blocks, and swap space. We end with coverage of disk reliability and stable-storage.

    ppt32p thuongdanguyetan03 18-04-2020 6 0   Download

  • Internal sort: all data are help inprimary memory during the sorting process. external sort: primary memory for data currently being sorted and secondary storage for data that do not fit in primary memory.

    pdf60p trinh02 28-01-2013 52 6   Download

  • Database System: Chapter 9 - Disk Storage and Indexing Structures for Files presents about Disk Storage Devices (Preferred secondary storage device for high storage capacity and low cost, Data stored as magnetized areas on magnetic disk surfaces,...), Files of Records, Indexing Structures for Files.

    ppt37p cocacola_17 10-12-2015 38 3   Download

  • In this chapter, we begin a discussion of file systems at the lowest level: the structure of secondary storage. We first describe the physical structure of hard disks and magnetic tapes. We then describe disk-scheduling algorithms, which schedule the order of disk I/Os to maximize performance. Next, we discuss disk formatting and management of boot blocks, damaged blocks, and swap space. We conclude with an examination of the structure of RAID systems.

    pdf22p tangtuy05 01-04-2016 28 1   Download

  • Chapter 9 - Disk Storage and Indexing Structures for Files presents about Disk Storage Devices (Preferred secondary storage device for high storage capacity and low cost, Data stored as magnetized areas on magnetic disk surfaces,...), Files of Records, Indexing Structures for Files.

    ppt37p thuongdanguyetan03 18-04-2020 6 0   Download

  • Module 14 - Tertiary storage structure. In this chapter introduced the concept of primary, secondary, and tertiary storage. In this chapter, we discuss tertiary storage in more detail. First we describe the types of storage devices used for tertiary storage. Next, we discuss the issues that arise when an operating system uses tertiary storage. Finally, we consider some performance aspects of tertiary storage systems.

    ppt15p thuongdanguyetan03 18-04-2020 12 0   Download

  • Overview of Mass Storage Structure Disk Structure Disk Attachment Disk Scheduling Disk Management Swap-Space Management RAID Structure Disk Attachment Stable-Storage Implementation Tertiary Storage Devices Operating System Issues Performance Issues Describe the physical structure of secondary and tertiary storage devices and the resulting effects on the uses of the devices Explain the performance characteristics of mass-storage devices Discuss operating-system services provided for mass storage, including RAID and HSM Overview of Mass Storage Structure...

    pdf49p perpan 02-09-2012 60 10   Download

  • Central processing unit (CPU) “Administrative” section Supervises and coordinates other sections of computer Secondary storage unit Long-term, high-capacity “warehouse” section Storage Inactive programs or data Secondary storage devices. Disks Longer to access than primary memory Less expensive per unit than primary memory

    ppt61p sakuraphuong 04-06-2013 42 6   Download

  • This chapter is primarily concerned with issues surrounding file storage and access on the most common secondary-storage medium, the disk. We explore ways to structure file use, to allocate disk space, to recover freed space, to track the locations of data, and to interface other parts of the operating system to secondary storage. Performance issues are considered throughout the chapter.

    pdf24p tangtuy05 01-04-2016 36 1   Download

  • After studying this chapter, you should be able to: Discuss basic concepts related to concurrency, such as race conditions, OS concerns, and mutual exclusion requirements; understand hardware approaches to supporting mutual exclusion; define and explain semaphores; define and explain monitors.

    ppt32p nanhankhuoctai10 23-07-2020 3 0   Download

  • This chapter is primarily concerned with issues surrounding file storage and access on the most common secondary-storage medium, the disk. We explore ways to structure file use, to allocate disk space, to recover freed space, to track the locations of data, and to interface other parts of the operating system to secondary storage. Performance issues are considered throughout the chapter.

    ppt25p koxih_kothogmih3 24-08-2020 6 0   Download

  • In this chapter, we begin a discussion of file systems at the lowest level: the structure of secondary storage. We first describe the physical structure of hard disks and magnetic tapes. We then describe disk-scheduling algorithms, which schedule the order of disk I/Os to maximize performance. Next, we discuss disk formatting and management of boot blocks, damaged blocks, and swap space. We conclude with an examination of the structure of RAID systems.

    ppt23p koxih_kothogmih3 24-08-2020 4 0   Download

  • File System Structure File System Implementation Directory Implementation Allocation Methods Free-Space Management Efficiency and Performance Recovery Log-Structured File Systems NFS File-System Structure File structure Logical storage unit Collection of related information File system resides on secondary storage (disks). File system organized into layers. File control block – storage structure consisting of information about a file. Operating System Concepts 12.1 Silberschatz, Galvin and Gagne ©2002 Operating System Concepts 12.

    pdf8p kanguru_91 28-09-2010 114 23   Download

  • File-System Structure File-System Implementation Directory Implementation Allocation Methods Free-Space Management Efficiency and Performance Recovery Log-Structured File Systems NFS Example: WAFL File System To describe the details of implementing local file systems and directory structures To describe the implementation of remote file systems To discuss block allocation and free-block algorithms and trade-offs File-System Structure File structure Logical storage unit Collection of related information File system resides on secondary storage (disks) File system organized into...

    pdf55p perpan 02-09-2012 67 11   Download

  • Textual data is unstructured, unlike the rigidly structured data in relational databases. The term information retrieval generally refers to the querying of unstructured textual data. Information-retrieval systems have much in common with database systems, in particular, the storage and retrieval of data on secondary storage. Chapter 21 describes information-retrieval techniques for querying textual data, including hyperlink-based techniques used in Web search engines.

    pdf25p dien_vi01 21-11-2018 10 0   Download

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