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Modify sidebars.js for replica aware routing
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docs/en/cloud/manage/replica-aware-routing.md

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---
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title: Replica-aware routing
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title: Replica-aware Routing
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slug: /en/manage/replica-aware-routing
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description: How to use Replica-aware routing to increase cache re-use
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keywords: [cloud, sticky endpoints, sticky, endpoints, sticky routing, routing, replica aware routing]
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---
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# Replica-aware routing (Private Preview)
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Replica-aware routing (sticky sessions, routing) utilizes [Envoy proxy’s ring hash load balancing](https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/upstream/load_balancing/load_balancers#ring-hash). The main purpose of replica-aware routing is to increase the chance of cache reuse. It does not guarantee isolation.
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Replica-aware routing (also known as sticky sessions, sticky routing, or session affinity) utilizes [Envoy proxy’s ring hash load balancing](https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/upstream/load_balancing/load_balancers#ring-hash). The main purpose of replica-aware routing is to increase the chance of cache reuse. It does not guarantee isolation.
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When enabling replica-aware routing for a service, we allow a wildcard subdomain on top of the service hostname. For a service with the host name `abcxyz123.us-west-2.aws.clickhouse.cloud`, you can use any hostname which matches `*.sticky.abcxyz123.us-west-2.aws.clickhouse.cloud` to visit the service:
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Customers need to manually add a DNS entry to make name resolution work for the new hostname pattern. It is possible that this can cause imbalance in the server load if customers use it incorrectly.
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## Configuring Replica-aware routing
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## Configuring Replica-aware Routing
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To enable Replica-aware routing, please contact [our support team](https://clickhouse.com/support).

sidebars.js

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],
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},
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"en/cloud/manage/settings",
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"en/cloud/manage/sticky-endpoints",
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"en/cloud/manage/replica-aware-routing",
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"en/cloud/manage/scaling",
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"en/cloud/manage/service-uptime",
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"en/cloud/manage/notifications",

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