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scaling-best-practices.rst
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======================
Scaling Best Practices
======================
docs: fixed database scaling docs. Fixes #4281
r1001 When deploying |RCE| at scale; 1000s of users, multiple instances, CI servers,
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r1 there are a number of steps you can take to ensure you are getting the
most out of your system.
Separate Users and CI Servers
-----------------------------
You can configure multiple |RCE| instances to point to the same database and
set of |repos|. This lets users work on an instance that has less traffic
than those being hit by CI servers. To configure this, use |RCC| to install
multiple instances and configure the database and |repos| connection. If you
docs: fixed database scaling docs. Fixes #4281
r1001 do need to reset/adjust the database connection, see the
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r1 :ref:`config-database` section.
docs: fixed database scaling docs. Fixes #4281
r1001 You can configure then a load-balancer to balance the traffic between the CI
dedicated instance and instance that end users would use.
See the :ref:`nginx-ws-ref` section for examples on how to do it in NGINX.
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Switch to Database Sessions
---------------------------
docs: fixed database scaling docs. Fixes #4281
r1001 To increase |RCE| performance switch from the default file based sessions to
database-based. In such way all your distributed instances would not need to
share the file storage to use file-based sessions.
Database based session have an additional advantage of the file
based ones that they don't need a periodic cleanup as the session library
cleans them up for users. For configuration details,
see the :ref:`db-session-ref` section.
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Tuning |RCE|
------------
There are also a number of options available to tune |RCE| for certain
scenarios, including memory cache size. See the :ref:`rhodecode-tuning-ref`
section.
Use Authentication Tokens
-------------------------
Set up a user account for external services, and then use Authentication
Tokens with those external services. These tokens work with
push/pull operations only, and you can manage multiple tokens through this user
account, and revoke particular ones if necessary. In this way one user can have
multiple tokens, so all your jenkins/CI servers could share one account.
* To enable tokens, go to :menuselection:`Admin --> Authentication` and enable
the `rhodecode.lib.auth_modules.auth_token` library.
* To create tokens, go to
:menuselection:`Username --> My Account --> Auth tokens` and generate the
necessary tokens. For more information, see the :ref:`config-token-ref`
section.
Scaling Deployment Diagram
--------------------------
.. image:: ../images/scaling-diagrm.png
:align: center