Database

Checkout this for selecting the right database for your application Choosing the right database for any system design is always an important decision. …

Part 1: Read Aside Caching Part 2: Enhanced Approaches (expected to be released on 7/11) Today we are going to talk about consistency, especially the consistency of data between cache and database. This is actually an important topic, particularly as the size of an organization increases, the requirements for consistency…

This blog is part of the series where we discuss 101 concepts from Ground Zero for an audience that has limited starting knowledge. This article comes in the Intermediate-Level Series since it involves understanding the of Data Modeling in Document Databases. Document DB’s provide more flexibility and scalability to developers…

SQAlchemy, ORM, and data version control with Python — Introduction Many apps require some sort of storage. Maybe you’re a business selling your articles online, and you need to keep an inventory. Maybe you’re building a forum and need to track everyone’s posts. …

Usually, when you use the term “migrate a database”, it often means data migration, not schema migration. Then, what is the difference between schema migration and data migration? Schema migration(or database migration or database change management) Schema migration is also called database change management. It means managing the relational database schema, as the word suggests. This management means…

보통 데이터베이스를 마이그레이션 한다는 말을 쓸 땐 schema migration을 의미하는 것이 아닌 data migration을 의미하는 경우가 많습니다. 그렇다면 schema migration과 data migration의 차이는 뭘까요? Schema migration(or database migration or database change management) Schema migration은 database change management 라고도 하는데요. 단어에서 알 수 있듯이 관계형 데이터베이스 스키마를 관리하는 것을 의미합니다. 이 관리란 스키마 증가 관리, 변경을 되돌릴 수 있도록 변경 사항에 대한 관리 및 데이터베이스 버전을 제어하고 관리하는 것을 의미합니다. 데이터베이스의 스키마를 최신버전으로 업데이트하거나 이전 버전으로 되돌려야 할 때 schema migration이 수행되는 것이죠.

Overview Database migration is not an easy task while keep the infrastructure stable and less risky. It might led to some critical risks such as downtime for services or data loss during the migration. By using minimal downtime migration, we could reduce downtime risk to our service into very minimum time…

As a developer, one of the things I appreciate when debugging or writing new features is the ability to look at old behavior to make informed decisions about what I have to do. I can look at use cases, at why things were changes and at the nature of such…