What is the difference between synchronous and asynchronous replication in postgresql

In this session we are going to about key differences between synchronous and asynchronous replication in PostgreSQL.

i) The concept of replication is changed Happening in one database are replicated into other databases

ii) It can be made in two ways
1) synchronous replication
2) Asynchronous replication

Asynchronous replication:

• It’s a standard way To replicate data in PostgreSQL

• Advantages of this replication are low overhead, simplicity & robustness.

• As a result of async replication is the ideal solution of automatic failover
  And enterprise-grade pregnancies

synchronous replication:

If you are not ready to take the risk of losing a cothe mmit sync replication is best solution

• It ensures the highest possible security of our transactions

#postgresql

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PostgreSQL synchronous_commit Options and Synchronous Standby Replication

I find myself discussing and explaining sychronous_commit with many PostgreSQL users, especially with novice users. So, I thought of noting down all the key points as a blog post which will be useful for more users. Recently I got an opportunity to talk about some related topics in our PostgreSQL Percona Tech Days.

What Is sychronous_commit All About?

This is the parameter by which we can decide when a transaction-commit can be acknowledged back to the client as successful.

So this parameter is not just about synchronous standbys, but it has a wider meaning and implication which is useful for standalone PostgreSQL instances as well. To better understand, we should look at the overall WAL record propagation and various stages from which a commit confirmation is acceptable. This allows us to opt for varying levels of durability for each transaction. The lesser the durability selection, the faster the acknowledgment, which improves the overall throughput and performance of the system.

WAL Propagation

PostgreSQL WAL (Write Ahead Log) is the record of changes/activities on the Primary side and can be considered as a journal/ledger of the changes happening in the database. The following diagram shows the flow of WAL propagation in a local primary PostgreSQL instance and a remote hot standby instance.

#database #tutorial #postgresql #synchronous commit #synchronous standby replication #wal propagation

What is the difference between synchronous and asynchronous replication in postgresql

In this session we are going to about key differences between synchronous and asynchronous replication in PostgreSQL.

i) The concept of replication is changed Happening in one database are replicated into other databases

ii) It can be made in two ways
1) synchronous replication
2) Asynchronous replication

Asynchronous replication:

• It’s a standard way To replicate data in PostgreSQL

• Advantages of this replication are low overhead, simplicity & robustness.

• As a result of async replication is the ideal solution of automatic failover
  And enterprise-grade pregnancies

synchronous replication:

If you are not ready to take the risk of losing a cothe mmit sync replication is best solution

• It ensures the highest possible security of our transactions

#postgresql

Database Replication - Synchronous vs Asynchronous - System Design Tutorials - Lecture 18

This is the eighteenth video in the series of System Design Primer Course. We talk about one more important component of System Design: Database Replication.
We want software engineers and aspiring software engineers to develop basics and get ready for the world of interviews as well as excelling as a Software Engineer.

#system design #database #synchronous #asynchronous

Synchronous vs Asynchronous in Javascript

In this video, we’ll look at Synchronous vs Asynchronous in Javascript.

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https://instagram.com/code_spot?igshid=wa32ffqf0vw2

#javascript #synchronous #asynchronous

How to execute asynchronous query with Spring JPA and PostgreSQL | Spring Boot » grokonez

https://grokonez.com/spring-framework/spring-boot/how-to-execute-asynchronous-query-with-spring-jpa-and-postgresql-spring-boot

How to execute asynchronous query with Spring JPA and PostgreSQL | Spring Boot

In tradition approach, implementing Data Access Layer makes lots of boilerplate code. Spring Data provides us Spring JPA which supports the ways to write interface for repositories and custom finder methods. The implementation will be done automatically by Spring Framework.

The tutorial shows you how to execute asynchronous query with Spring JPA and PostgreSQL using Spring Boot.

Related articles:

• Java 8 Streams
• How to use Spring JPA MySQL | Spring Boot
• How to use Spring JPA with PostgreSQL | Spring Boot
• How to get streaming results with Spring JPA, Java 8 Stream and PostgreSQL | Spring Boot
• @DataJPATest with Spring Boot

I. Technology

- Java 1.8 - Maven 3.3.9 - Spring Tool Suite – Version 3.8.1.RELEASE - Spring Boot: 1.5.1.RELEASE

II. Overview

1. Project Structure

- Class Customer corresponds to entity and table customer, it should be implemented Serializable. - CustomerRepository is an interface extends CrudRepository, will be autowired in WebController for implementing repository methods and custom finder methods. - WebController is a REST Controller which has request mapping methods for RESTful requests such as: save, findall, findonebyid, findbylastname. - Configuration for Spring Datasource and Spring JPA properties in application.properties - Dependencies for Spring Boot and PostgreSQL in pom.xml

2. Step to do

- Create Spring Boot project & add Dependencies - Configure Spring JPA - Create DataModel Class - Create Spring JPA Repository Interface - Create Web Controller - Create PostGreSQL table - Run Spring Boot Application & Enjoy Result

III. Practice

1. Create Spring Boot project & add Dependencies

Open Spring Tool Suite, on Menu, choose File -> New -> Spring Starter Project, then fill each fields. Click Next, in SQL: choose JPA and PostgreSQL, in Web: choose Web. Click Finish, then our project will be created successfully.

More at:

https://grokonez.com/spring-framework/spring-boot/how-to-execute-asynchronous-query-with-spring-jpa-and-postgresql-spring-boot

How to execute asynchronous query with Spring JPA and PostgreSQL | Spring Boot

#springboot #asynchronous #springjpa #postgresql