The ACID Test and the Importance of Information Systems

Managing Database System
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Part 1
Demonstrate and describe the atomicity, consistency, isolation, and durability (ACID) test, including the meaning of each of the four components. Provide an example that illustrates the importance of adhering to the ACID test
Atomicity (A): Atomicity ensures that every transaction is an “all-or-nothing” occurrence. Atomic operations do not allow incomplete transactions, preventing data corruption. A transaction is “scaled back” to the prior state if it cannot be finished as if it never took place. Data transactions, such as adding a new record to a database or deleting an existing one, should be completed entirely. Only once the payment has been fully processed is it accessible to other users.
Consistency (C): This entails having consistent data after the start and conclusion of a transaction. Consistency ensures that the total sum amount of monies in both accounts is identical in an application at the conception and conclusion of every transaction when cash is sent from one account to another.
Isolation (I): The outcome of numerous concurrent payments must be identical to if they had each taken place independently (Osborne, 2022). Thus, the stress test for the database should be successful, meaning it should not overwhelm the system and cause inaccurate database operations.
Durability (D): The database’s data must only alter due to transactions; outside forces cannot alter it. For instance, a software upgrade must not unintentionally alter or potentially lose data.
Provide an example that illustrates the importance of adhering to the ACID test
To further comprehend the significance of ACID activities to database systems, let’s take an illustration. Take a look at a financial application. Let’s say you want to withdraw $70 from your Prime Bank account. This business procedure necessitates the completion of a transaction. You can use an ATM to demand the cash in person or present a slip to a bank teller. The bank takes the following actions when it gets the request to conclude the entire business procedure. The bank will:
1. Verify that you have enough money to remove the specified amount.
2. The processing will proceed if you accept the request and halt.
3. Debit your bank account with the requested sum.
4. Create a transaction receipt.
5. Give you the specified sum together with the receipt.
All these stages must be followed by the transaction executing the withdrawal. Otherwise, one of the participants in the payment will be unsatisfied.
Explain “collateral damage” in an update query
When data is updated or modified in other portions of a database when they weren’t expected to be altered when you are updating another area, this is referred to as collateral damage in connection to an update query (Osborne, 2022). When you update a query, and specific fields harm other data as a result – this is known as collateral damage.
Explain why locking prevents dirty reads
A dirty read occurs when a transaction is modifying some data but hasn’t yet committed, allowing another process to view the uncommitte...