A company is running a standard PostgreSQL database on premises. The company is migrating the database to the AWS Cloud and does not want to change the queries that access the database. The company must maximize the query performance.
Which AWS service will meet these requirements?
Amazon Aurora PostgreSQL is designed to be compatible with PostgreSQL, allowing existing applications and tools to run without requiring modification. This means queries do not need to be changed when migrating. Additionally, it offers significant performance improvements over standard PostgreSQL, making it the best option to maximize query performance.
Option A is correct, with option B user has to change querys refering Aurora Database Endpoint for each query
100% accurate.
The correct answer is A. Amazon RDS for PostgreSQL. Amazon RDS for PostgreSQL is a fully managed database service that makes it easy to set up, operate, and scale PostgreSQL deployments in the cloud. It is designed to be compatible with existing PostgreSQL applications, so you can migrate your database to the cloud without changing your queries. Amazon RDS for PostgreSQL can also automatically scale the underlying hardware resources based on the workload, which can help maximize query performance. Amazon Aurora PostgreSQL is also a fully managed database service, but it is designed to be compatible with PostgreSQL and to offer improved performance and scalability. However, it is not a drop-in replacement for PostgreSQL, so you may need to modify your queries to take advantage of its features.
just to correct that ....... "Aurora PostgreSQL is a drop-in replacement for PostgreSQL and makes it simple and cost-effective to set up, operate, and scale your new and existing PostgreSQL deployments, thus freeing you to focus on your business and applications" from documentation. https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.AuroraPostgreSQL.html
B: Aurora, its 100% compatible with postgreSQL no need to make any changes in the queries, and the performance is better than RDS
Agreed. "Aurora is fully compatible with MySQL and PostgreSQL, allowing existing applications and tools to run without requiring modification." (https://aws.amazon.com/rds/aurora/features/#Migration_Support)
answer is from:https://www.amazonaws.cn/en/rds/aurora/postgresql-features/ Amazon Aurora is a relational database service that combines the speed and availability of high-end commercial databases with the simplicity and cost-effectiveness of open source databases. The PostgreSQL-compatible edition of Aurora delivers up to 3X the throughput of standard PostgreSQL running on the same hardware, enabling existing PostgreSQL applications and tools to run without requiring modification. The combination of PostgreSQL compatibility with Aurora enterprise database capabilities provides an ideal target for commercial database migrations.
To migrate a standard PostgreSQL database to the AWS Cloud without changing the queries and maximize query performance, you should consider using: B. Amazon Aurora PostgreSQL Amazon Aurora is a fully managed relational database service that is compatible with both MySQL and PostgreSQL
B. Amazon Aurora PostgreSQL https://aws.amazon.com/rds/aurora/features/#Migration_Support "Aurora is fully compatible with MySQL and PostgreSQL, allowing existing applications and tools to run without requiring modification." "Testing on standard benchmarks such as SysBench has shown an increase in throughput of up to 5x over stock MySQL and 3x over stock PostgreSQL on similar hardware. Aurora uses a variety of software and hardware techniques to ensure the database engine is able to fully use available compute, memory, and networking. I/O operations use distributed systems techniques, such as quorums to improve performance consistency."
Option A
Aurora PostgreSQL is a drop-in replacement for PostgreSQL, so no code change is required and its also 3 times faster.
Aurora PostgreSQL > 3 time faster (RDS PostgreSQL) so for best performance Aurora should be the choice. Most cost effective will be RDS
https://aws.amazon.com/rds/aurora/features/ Amazon Aurora is a relational database service that combines the speed and availability of high-end commercial databases with the simplicity and cost-effectiveness of open-source databases. Aurora is fully compatible with MySQL and PostgreSQL, allowing existing applications and tools to run without requiring modification.
Amazon RDS for PostgreSQL
Correct answer is B = "When you want to achieve the best performance without changing existing queries while moving the current PostgreSQL database to AWS Cloud, considering the scenario you have provided, the best option will be B. Amazon Aurora PostgreSQL."
B aurora
B: Aurora PostgreSQL If the company doesn’t want to change the queries that access the database, both Amazon RDS for PostgreSQL and Amazon Aurora PostgreSQL would work, as they both support standard PostgreSQL queries. However, if maximizing query performance is a priority, Amazon Aurora PostgreSQL might be the better choice. It’s designed to be compatible with PostgreSQL, so the company can use existing PostgreSQL queries without needing to change them. Plus, Aurora PostgreSQL is often faster than standard PostgreSQL, especially for transaction processing.
A & B are both valid answers. Both require the same amount or method to migrate. https://aws.amazon.com/blogs/database/best-practices-for-migrating-postgresql-databases-to-amazon-rds-and-amazon-aurora/
Option A is correct because the queries for the database do not have to change after the migration.
Aurora claims over 3x the performance of Postgres on RDS