Nucleus Overview

Introduction

At the core of Omniverse is a set of fundamental services known as NVIDIA Omniverse™ Nucleus that allow a variety of Omniverse-enabled client applications ( Apps, Connectors, and others) to share and modify authoritative representations of virtual worlds.

Ultimately, Nucleus sits on a network somewhere, with clients connected to it, sharing the same authoritative state of a virtual world.

Omniverse Nucleus allows live syncing. This is a publish/subscribe model, where multiple Clients connected to it in such a manner that once one of those Clients submits a change (publishes it), every other Client (subscriber) will immediately receive that change.

Data Model

Nucleus Core represents assets in a hierarchical, tree-like structure. To an end user it looks just like a faimiliar file tree - with directories and files inside them.

Files can be uploaded, downloaded, and moved around; directories created, deleted, and listed.

Nucleus utilizes a single file tree similar to Unix systems, with a “path” to a file being a forward-slash (/) separated string of “nodes”:

  • /Users/awesome_me/

  • /Users/awesome_me/myfile.usd

… and so on.

Though Nucleus itself does not care what kind of files are in there (one can upload anything to Nucleus as if it was a fileserver), the most common data formats used across Omniverse are USD, MDL, and similar.