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.. _topic/whentouse:
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===================================
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When to use The Littlest JupyterHub
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===================================
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This page is a brief guide to determining whether to use The Littlest JupyterHub
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(TLJH) or `Zero to JupyterHub for Kubernetes <https://zero-to-jupyterhub.readthedocs.io/en/latest/>`_ (Z2JH).
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Many of these ideas were first laid out in a
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`blog post announcing TLJH <http://words.yuvi.in/post/the-littlest-jupyterhub/>`_.
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**The Littlest JupyterHub (TLJH)** (`link <https://the-littlest-jupyterhub.readthedocs.io/en/latest/>`_) is an opinionated and pre-configured distribution
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to deploy a JupyterHub on a **single machine** (in the cloud or on your own hardware).
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It is designed to be a more lightweight and maintainable solution
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for use-cases where size, scalability, and cost-savings are not a huge concern.
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**Zero to JupyterHub on Kubernetes** (`link <https://zero-to-jupyterhub.readthedocs.io/en/latest/>`_) allows you
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to deploy JupyterHub on **Kubernetes**. This allows JupyterHub to scale to many thousands
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of users, to flexibly grow/shrink the size of resources it needs, and to use
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container technology in administering user sessions.
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When to use TLJH vs. Z2JH
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=========================
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The choice between TLJH and Z2JH ultimately comes down to only a few questoins:
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1. Do you want your hub and all users to live on a **single, larger machine** vs. spreading users on a **cluster of smaller machines** that are scaled up or down?
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* If you can use a single machine, we recommend **The Littlest JupyterHub**.
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* If you wish to use multiple machines, we recommend **Zero to JupyterHub for Kubernetes**.
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2. Do you **need to use container technology**?
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* If no, we recommend **The Littlest JupyterHub**.
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* If yes, we recommend **Zero to JupyterHub for Kubernetes**.
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