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Chapter 14 Implementations of File Operations Copyright © 2008 Introduction • Layers of the Input-Output Control System • Overview of I/O Organization • I/O Devices • Device-Level I/O • The Physical IOCS • Device Drivers • Disk Scheduling Operating Systems, by Dhananjay Dhamdherehamdhere 14.2 2 Copyright © 2008 Introduction (continued) • Buffering of Records • Blocking of Records • Access Methods • Disk and File Caches • Unified Disk Cache • Case Studies Operating Systems, by Dhananjay Dhamdherehamdhere 14.3 3 Copyright © 2008 Layers of the Input-Output Control System • Input-output control system (IOCS) holds some file data in memory to provide efficient file processing and high device throughput Operating Systems, by Dhananjay Dhamdherehamdhere 14.4 4 Copyright © 2008 Layers of the Input-Output Control System (continued) • Two layers: – Access method layer provides efficient file processing – Physical IOCS layer provides high device throughput Operating Systems, by Dhananjay Dhamdherehamdhere 14.5 5 Copyright © 2008 ... - tailieumienphi.vn
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