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50 lines
2.3 KiB
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50 lines
2.3 KiB
ReStructuredText
Setting up a notary service
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---------------------------
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Corda comes with several notary implementations built-in:
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1. **Single-node**: a simple notary service that persists notarisation requests in the node's database. It is easy to set up
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and is recommended for testing, and production networks that do not have strict availability requirements.
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2. **Crash fault-tolerant** *(experimental)*: a highly available notary service operated by a single party.
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3. **Byzantine fault-tolerant** *(experimental)*: a decentralised highly available notary service operated by a group of parties.
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Single-node
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===========
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To have a regular Corda node provide a notary service you simply need to set appropriate ``notary`` configuration values
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before starting it:
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.. parsed-literal::
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notary : { validating : false }
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For a validating notary service specify:
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.. parsed-literal::
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notary : { validating : true }
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See :ref:`key_concepts_notaries_validation` for more details about validating versus non-validating notaries.
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For clients to be able to use the notary service, its identity must be added to the network parameters. This will be
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done automatically when creating the network, if using :doc:`network-bootstrapper`. See :doc:`setting-up-a-corda-network`
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for more details.
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Crash fault-tolerant (experimental)
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===================================
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Corda provides a prototype `Raft-based <http://atomix.io/>`_ highly available notary implementation. You can try it out on our
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`notary demo <https://github.com/corda/corda/tree/release-V3.1/samples/notary-demo>`_ page. Note that it has known limitations
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and is not recommended for production use.
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Byzantine fault-tolerant (experimental)
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=======================================
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A prototype BFT notary implementation based on `BFT-Smart <https://github.com/bft-smart/library>`_ is available. You can
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try it out on our `notary demo <https://github.com/corda/corda/tree/release-V3.1/samples/notary-demo>`_ page. Note that it
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is still experimental and there is active work ongoing for a production ready solution. Additionally, BFT-Smart requires Java
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serialization which is disabled by default in Corda due to security risks, and it will only work in dev mode where this can
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be customised.
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We do not recommend using it in any long-running test or production deployments. |