RCS adopts a reverse delta approach for storing multiple versions of a file. For example, assume a file has three revisions, 1.1, 1.2, and 1.3, RCS stores the file as of version 1.3, then, the differences between 1.2 and 1.3, and the differences between 1.1 and 1.2. When a new version is created, say 1.4, the difference between 1.3 and 1.4 is computed and stored, and the 1.3 version is deleted and replaced by 1.4. Explain why RCS does not simply store the initial version (in this case 1.1) and the differences between each successive version.

RCS adopts a reverse delta approach for storing multiple versions of a file. For example, assume a file has three revisions, 1.1, 1.2, and 1.3, RCS stores the file as of version 1.3, then, the differences between 1.2 and 1.3, and the differences between 1.1 and 1.2. When a new version is created, say 1.4, the difference between 1.3 and 1.4 is computed and stored, and the 1.3 version is deleted and replaced by 1.4. Explain why RCS does not simply store the initial version (in this case 1.1) and the differences between each successive version.

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

See similar textbooks

Similar questions

In a single bin system, the target level is determined by the size of the bin. a. False b. True
With the exception of fp being a file pointer rather than a file descriptor and the return value being an int status rather than a location, the standard library method int fseek(FILE *fp, long offset, int origin) is identical to Iseek. Compose fseek. Ensure that the caching used for the other library functions and your fseek are correctly coordinated.
Explain how a publish-subscribe system, such as Apache Kafka, may be used to run several operations on a stream.
Write a program that reads movie data from a CSV (comma separated values) file and output the data in a formatted table. The program first reads the name of the CSV file from the user. The program then reads the CSV file and outputs the contents according to the following requirements: Each row contains the title, rating, and all showtimes of a unique movie. A space is placed before and after each vertical separator ('|') in each row. Column 1 displays the movie titles and is left justified with a minimum of 44 characters. If the movie title has more than 44 characters, output the first 44 characters only. Column 2 displays the movie ratings and is right justified with a minimum of 5 characters. Column 3 displays all the showtimes of the same movie, separated by a space. Each row of the CSV file contains the showtime, title, and rating of a movie. Assume data of the same movie are grouped in consecutive rows. Hints: Use the find() function to find the index of a comma in each row of…
The following system call adds read permission for a process (for_pid) if the caller (call_pid) owns the file, and does nothing otherwise. (The operating system supplies call_ pid; the caller supplies the two latter parameters.) function addread(call_pid, for_pid: process_id; fid: file_id): integer; begin if (call_pid = filelist[fid].owner) then addright(filelist[fid].access_control_list, for_pid, "r"); result := (call_pid - filelist[fid].owner); return result end. Is the variable result directly or indirectly visible, or not visible? Is the variable filelist[fid].owner directly or indirectly visible, or not visible? Is the variable filelist[fid].access_control directly or indirectly visible, or not visible?
Having a master file with data that is almost indestructible serves no use.
SAME PARAMETERS: In the RENTALS table shown in fig 2, 40 customers have created 50 rental contracts over time. A RENTALS record is 122 bytes and the block size for your OS is set to 1024 bytes with each block having a 1 byte pointer to the next written block as well as a 1 byte pointer to the next physically consecutive block. Assuming spanned organization, how many blocks do you estimate the RENTALS file is using at its current size? multiple choice a.50 b.6 c.400 d.7
What is the purpose of try-catch blocks in programming, and how do they contribute to robust file handling?
Octave/Matlab: How do I write a script that reads in the file and then collects the values from the columns into a vector like: file1.txt 10 11 12 13 14 15 So the output should look like: A = [10,13] B = [11,14] C = [12,15]
What are the advantages of the variation of linked allocation that uses a FAT to chain together the blocks of a file?
If two links to an existing file are created in the same directory as the original (using the link syscall), how many inodes are used to store information about the three directory entries?
Lab 14: Processing a json file Read in a JSON file such as the following: { "students":[ } { }, { "firstName" "lastName : "Doe", "major" : "CENT", "credits": 12, : "Jane", "exams" : [92.7, 91.4, 95.2] "firstName" : "John" "lastName' : "Doe" "major": "PHYS", "credits" : 10.0, "exams : [91.1, 81.3, 85.6] "firstName" : "Bill", "lastName : "Gates", "major": "ICS", "credits" : 7, exams" : [98.7, 94.4, 96.4] PART 1: Parse the JSON data into a dictionary and output the data as follows: Jane Doe is majoring in CENT John Doe is majoring in PHYS Bill Gates is majoring in ICS