Question: Discuss how the log file (or journal) is a fundamental feature in any recovery mechanism. Explain what is meant by forward and backward recovery and

Discuss how the log file (or journal) is a fundamental feature in any recovery mechanism. Explain what is meant by forward and backward recovery and describe how the log file is used in forward and backward recovery. What is the significance of the write-ahead log protocol? How do checkpoints affect the recovery protocol?

Step by Step Solution

★★★★★

3.42 Rating (161 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Log file contains before and afterimages of updates to the dat... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

672-CS-DB (1421).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

a. Continuing the analysis of the IDS query in Figure A-26, scrutinize Events 10 and 11. You need to know that the Trivial File Transfer Protocol is a way to download a file from a remote computer...

a) Why are integrated log files good? b) Why are they difficult to create? c) Explain the time synchronization issue for integrated log files. d) How do companies achieve time synchronization? e)...

Examine the integrated log file shown in Figure 10-19. a) Identify the stages in this apparent attack. b) For each stage, describe what the attacker seems to be doing? c) Decide whether the actions...

Question 5 a . Explain what is meant by a transaction and why it is an important unit of operation in a DBMS ? b . Discuss how the log file is a fundamental feature in any database recovery...

Describe, in detail, how the heapsort algorithm works. [10 marks] Show that the worst-case cost of heapsort is O(n log n). [6 marks] Would it be possible to implement a variant of heapsort based on a...

Use the story about the electricity market in California to answer Question 1 1) Apply supply-demand analysis and elasticity, and compose a short write-up to explain the volatility of electricity...

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

I need a 10 page paper for my MIS class. Please do not copy and paste as my school is getting stricter on plagiarism. I have attached the assignment and the sample \fData Analytic Thinking 1 Data...

Please find the assignment on page 30 of the attached file(unit outline), which is: Task 2 - Research Focused Project - 25% I need $4000 words for this research paper. Please Use Academic journal...

During the 1980s, the average emission of carbon from burning fossil fuels on Earth was 5.4 petagrams (Pg) of carbon per year in the form of CO2.4 (a) How many kg of C were placed in the atmosphere...

Identify three examples of matters that may be addressed in the living will, and administered to by the patients agent pursuant to a durable power of attorney.

Al of the following descriptions of operwing finance are true EXCEPT: Operating finance allows a business to borrow up to a pre - determined amount from the bank: An operating line is uwally secured...

As drivers of relationship marketing effectiveness, compare and contrast relationship breadth and relationship composition.

Why might it take a long time to complete transactions when an optimistic approach to concurrency control is used?

What are the three types of database critical events that can trigger the database recovery process? Give some examples for each one.

What are the four ANSI transaction isolation levels? What type of reads does each level allow?

Archer, A . L . , & Hughes, C . A . ( 2 0 1 1 ) . Explicit instruction: Effective and efficient teaching. New York, NY . Guilford Press.

A market research company surveyed families to measure how likely they were to purchase Tiny Tally snack foods. Their responses are shown below in the two-way table by family makeup. Has ChildrenDoes...

trends on Web Application Development Write about the latest web programming languages these days, mention some examples and explain them Write a simple article . Note : dont copy the answer from any...