Apache Cassandra

The Distributed Database Behind Twitter

The Distributed Database Behind Twitter

Twitter is one of the world’s favorite places for people and brands to connect online. Powering a global service that helps people share everything from breaking news and entertainment to sports, politics, and everyday interests takes infrastructure that can adapt and evolve over time.

In his talk at the 2020 Distributed SQL Summit, Mehrdad Nurolahzade, engineer on the real-time infrastructure team at Twitter, walks us through the distributed database behind Twitter,

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How Justuno Leveraged YugabyteDB to Consolidate Multiple SQL and NoSQL Databases

How Justuno Leveraged YugabyteDB to Consolidate Multiple SQL and NoSQL Databases

Justuno provides a Conversion Rate Optimization (CRO) Platform that enables e-commerce sites to turn visitors into customers through personalized onsite messaging, intelligent cross-selling, and upselling. More than 188,000 (and counting) industry leading brands improve sales and the customer experience at the same time.

At the heart of the Justuno platform is visitor intelligence data, and there’s a lot of it. Justuno tracks between 30 and 50 data points per visitor–such as time on site,

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How to Migrate Data from Cassandra or MySQL to YugabyteDB?

How to Migrate Data from Cassandra or MySQL to YugabyteDB?

If you work with databases, at some point you are going to need to get data in and out them using a format that can be consumed by a completely different system. YugabyteDB makes use of CSV files to make this as easy as possible. The CSV format is arguably the most universally portable way to get data migrations accomplished.

TL;DR – YugabyteDB makes use of Cassandra’s COPY FROM command and a forked version of Cassandra’s Bulk Loader to get data into the system.

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YugaByte Database Engineering Update – Nov 27, 2018

YugaByte Database Engineering Update – Nov 27, 2018

Lots has happened since our last engineering update about 3 months ago. Below are some of the highlights.

PostgreSQL API Updates & PostgresConf Silicon Valley Wrap-Up

We have made a lot of progress on YSQL, the PostgreSQL compatible distributed SQL API for YugabyteDB! You can also read about YSQL architecture which covers how distributed SQL is implemented in YugabyteDB.

We were at the first ever PostgresConf Silicon Valley in October 2018.

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YugabyteDB 1.1 New Feature: Document Data Modeling with the JSON Data Type

YugabyteDB 1.1 New Feature: Document Data Modeling with the JSON Data Type

Welcome to another post in our ongoing series that highlights new features from the latest 1.1 release announced last week. Today we are going to look at document data modeling using the native JSON data type available in YugabyteDB’s Cassandra compatible YCQL API. Note that this data type is specific to YugabyteDB and is not part of the standard Cassandra Query Language (CQL).

With YugabyteDB’s native JSON support,

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YugabyteDB 1.1 New Feature: Speeding Up Queries with Secondary Indexes

YugabyteDB 1.1 New Feature: Speeding Up Queries with Secondary Indexes

Welcome to another post from our ongoing series where we highlight a new feature from the latest 1.1 release! Today we are going to look at secondary indexes.

Defining Secondary Indexes

A database index is a data structure that improves the speed of data retrieval operations on a database table. Typically, databases are very efficient at looking up data by the primary key. A secondary index can be created using one or more columns of a database table,

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