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This repository contains the source code ofMicrosoft GraphEngine and its graph query language --Language IntegratedKnowledge Query (LIKQ).

Microsoft Graph Engine is a distributed in-memory data processing engine,underpinned by a strongly-typed in-memory key-value store and a general-purposedistributed computation engine.

LIKQ is a versatile graph query language built atop Graph Engine. Itcombines the capability of fast graph exploration with the flexibility of lambdaexpressions. Server-side computations can be expressed in lambda expressions,embedded in LIKQ, and executed on the Graph Engine servers during graphtraversal.

Recommended operating system: Windows 10 or Ubuntu 22.04.

Download and installVisual Studio with the following "workloads" and"individual components" selected:

• The ".NET desktop development" and "Desktop development with C++" workloads.
• The ".NET Portable Library targeting pack" individual component.

Open a PowerShell window, run.\tools\build.ps1 for building the NuGet packages.The script has been tested on Windows 10 (22H2) with Visual Studio 2022.

Install g++, cmake, and libssl-dev. For example, on Ubuntu, simply run

sudo apt update&& sudo apt install g++ cmake libssl-dev

Install.NET SDK x64 8.0. For example, on Ubuntu 22.04, runsudo apt update && sudo apt install -y dotnet-sdk-8.0.Then, build GraphEngine with the following command:

bash tools/build.sh

The build script has been tested on Ubuntu 22.04 with g++ 11.4.0.

You can find the built NuGet packagesbuild/GraphEngine**._version_.nupkg inthebuild folder. In the building process, thebuild directory has beenregistered as a local NuGet repository and the local package cache forGraphEngine.Core has been cleared. After the packages are built, rundotnet restore to use the newly built packages.

Go to thesamples/Friends folder, executedotnet restore anddotnet run torun the sample project.

Pull requests, issue reports, and suggestions are welcome.

Please read thecode of conduct before contributing code.

Follow theseinstructions for reporting security issues.

Copyright (c) Microsoft Corporation. All rights reserved.

Licensed under theMIT license.

Microsoft Graph Engine is a research project. It is not an officially supported Microsoft product.

We kindly request that any published paper that makes use of Microsoft GraphEngine cites the following paper:

• Bin Shao,Haixun Wang, andYatao Li.Trinity: A Distributed Graph Engine on a Memory Cloud. In SIGMOD 2013: Proceedings of SIGMOD 2013, New York, New York, USA, June 22-27, 2013, pages 505-516. (BibTeX)

If you want to learn more about the algorithms and applications built on top of Microsoft Graph Engine, please refer to thesepublications.