To improve performance when reading files, "block read ahead" can be performed. What is this? A.The operating system determines, when reading block K, if the file is being read sequentially. If it is, the file system will retrieve block K, and initiate the request for block K+1 in the file. B.The operating system determines, when writing block K, if the file is being written sequentially. If it is, the file system will retrieve block K, and initiate the request for block K+1 in the file. C.The operating system determines when reading block K if that block was accessed via a seek. If it is, the file system will retrieve block K, and initiate the request for the next block in the file that is needed by the process. D.All of the above

A) The operating system determines, when reading block K, if the file is being read sequentially. If…

Answered: To improve performance when reading…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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To improve performance when reading files, "block read ahead" can be performed. What is this?

	A.	The operating system determines, when reading block K, if the file is being read sequentially. If it is, the file system will retrieve block K, and initiate the request for block K+1 in the file.
	B.	The operating system determines, when writing block K, if the file is being written sequentially. If it is, the file system will retrieve block K, and initiate the request for block K+1 in the file.
	C.	The operating system determines when reading block K if that block was accessed via a seek. If it is, the file system will retrieve block K, and initiate the request for the next block in the file that is needed by the process.
	D.	All of the above

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