# Gaia

**Repository Path**: fastDataAnalysis/Gaia

## Basic Information

- **Project Name**: Gaia
- **Description**: FAST下的Gaia
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-07-24
- **Last Updated**: 2022-07-25

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README


<div align=center>
<img src="./gaia-logo.png" width="300" height="300" />
</div>

# Gaia

Gaia is a new generation of time-efficient and scalable big data computing system based on the hybrid coexistence of multiple computing models. It solves a series of key technical problems at several core levels of big data analytics system, such as adaptive and scalable big data storage, batch flow fusion big data computing, high-dimensional large-scale machine learning and high time-efficient big data intelligent interaction wizard, to build an independent and controllable new generation of time-efficient and scalable big data analytics system and master the international leading core technology of big data analytics system.


### Features

* A streaming-first runtime that supports both batch processing and data streaming programs

* Elegant and fluent APIs in Java and Scala

* A runtime that supports very high throughput and low event latency at the same time

* Support for *event time* and *out-of-order* processing in the DataStream API, based on the *Dataflow Model*

* Flexible windowing (time, count, sessions, custom triggers) across different time semantics (event time, processing time)

* Fault-tolerance with *exactly-once* processing guarantees

* Natural back-pressure in streaming programs

* Libraries for Graph processing (batch), Machine Learning (batch), and Complex Event Processing (streaming)

* Built-in support for iterative programs (BSP) in the DataSet (batch) API

* Custom memory management for efficient and robust switching between in-memory and out-of-core data processing algorithms

* Compatibility layers for Apache Hadoop MapReduce

* Integration with YARN, HDFS, HBase, and other components of the Apache Hadoop ecosystem


### Streaming Example
```scala
case class WordWithCount(word: String, count: Long)

val text = env.socketTextStream(host, port, '\n')

val windowCounts = text.flatMap { w => w.split("\\s") }
  .map { w => WordWithCount(w, 1) }
  .keyBy("word")
  .timeWindow(Time.seconds(5))
  .sum("count")

windowCounts.print()
```

### Batch Example
```scala
case class WordWithCount(word: String, count: Long)

val text = env.readTextFile(path)

val counts = text.flatMap { w => w.split("\\s") }
  .map { w => WordWithCount(w, 1) }
  .groupBy("word")
  .sum("count")

counts.writeAsCsv(outputPath)
```



## Building Gaia from Source

Prerequisites for building Gaia:

* Unix-like environment (we use Linux, Mac OS X, Cygwin)
* git
* Maven (we recommend version 3.2.5)
* Java 8 (Java 9 and 10 are not yet supported)

```
git clone https://toscode.gitee.com/GaiaSystem/gaia.git
cd gaia
mvn clean package -DskipTests # this will take up to 10 minutes
```

Gaia is now installed in `build-target`

*NOTE: Maven 3.3.x can build Gaia, but will not properly shade away certain dependencies. Maven 3.0.3 creates the libraries properly.
To build unit tests with Java 8, use Java 8u51 or above to prevent failures in unit tests that use the PowerMock runner.*

## Developing Gaia

The Gaia committers use IntelliJ IDEA to develop the Gaia codebase.
We recommend IntelliJ IDEA for developing projects that involve Scala code.

Minimal requirements for an IDE are:
* Support for Java and Scala (also mixed projects)
* Support for Maven with Java and Scala


### IntelliJ IDEA

The IntelliJ IDE supports Maven out of the box and offers a plugin for Scala development.

* IntelliJ download: [https://www.jetbrains.com/idea/](https://www.jetbrains.com/idea/)
* IntelliJ Scala Plugin: [http://plugins.jetbrains.com/plugin/?id=1347](http://plugins.jetbrains.com/plugin/?id=1347)


### Eclipse Scala IDE

**NOTE:** From our experience, this setup does not work with Gaia
due to deficiencies of the old Eclipse version bundled with Scala IDE 3.0.3 or
due to version incompatibilities with the bundled Scala version in Scala IDE 4.4.1.

**We recommend to use IntelliJ instead (see above)**

## Support

Don’t hesitate to ask!

[Open an issue](https://toscode.gitee.com/GaiaSystem/gaia/issues) if you found a bug in Gaia.


## Fork and Contribute

This is an active open-source project. We are always open to people who want to use the system or contribute to it.
Contact us if you are looking for implementation tasks that fit your skills.


## About

Gaia is an open source project forever.
The Gaia project originated from the National Key R&D Program research project.