DOC-5712 Python SCE API and general intro

Author: andy-stark-redis

content/develop/clients/patterns/_index.md

@@ -13,7 +13,7 @@ description: Novel patterns for working with Redis data structures
 linkTitle: Coding patterns
 title: Coding patterns
 aliases: /develop/use/patterns
-weight: 50
+weight: 60
 ---
 
 The following documents describe some novel development patterns you can use with Redis.

content/develop/clients/redis-py/connect.md

@@ -252,3 +252,46 @@ a simple retry strategy by default, but there are various ways you can customize
 this behavior to suit your use case. See
 [Retries]({{< relref "/develop/clients/redis-py/produsage#retries" >}})
 for more information about custom retry strategies, with example code.
+
+## Connect using Seamless client experience (SCE)
+
+*Seamless client experience (SCE)* is a feature of Redis Cloud and
+Redis Enterprise servers that lets them actively notify clients
+about planned server maintenance shortly before it happens. This
+lets a client take action to avoid disruptions in service.
+See [Seamless client experience]({{< relref "/develop/clients/sce" >}})
+for more information about SCE.
+
+To enable SCE on the client, pass a `MaintenanceEventsConfig` object
+during the connection, as shown in the following example:
+
+```py
+import redis
+from redis.connection import MaintenanceEventsConfig
+from redis.maintenance_events import EndpointType
+
+r = redis.Redis(
+    decode_responses=True,
+    protocol=3,
+    maintenance_events_config= MaintenanceEventsConfig(
+        enabled=True,
+        proactive_reconnect=True,
+        relax_timeout=30,
+        endpoint_type=EndpointType.INTERNAL_IP,
+    ),
+    ...
+)
+```
+
+{{< note >}}SCE requires the [RESP3]({{< relref "/develop/reference/protocol-spec#resp-versions" >}})
+protocol, so you must set `protocol=3` explicitly when you connect.
+{{< /note >}}
+
+The `MaintenanceEventsConfig` constructor accepts the following parameters:
+
+| Name | Type | Default | Description |
+|------|------|---------|-------------|
+| `enabled` | `bool` | `False` | Whether or not to enable SCE. |
+| `proactive_reconnect` | `bool` | `False` | Whether or not to automatically reconnect when a node is replaced. |
+| `relax_timeout` | `int` | `20` | The number of seconds to wait before reconnecting after a node replacement. A value of `-1` disables the relax timeout. |
+| `endpoint_type` | `EndpointType` | `None` | Override for the endpoint type to use in the `CLIENT MAINT_NOTIFICATIONS` command. If this is `None`, the endpoint type will be  determined automatically based on the host and TLS configuration. |

content/develop/clients/sce.md

@@ -0,0 +1,46 @@
+---
+categories:
+- docs
+- develop
+- stack
+- oss
+- rs
+- rc
+- oss
+- kubernetes
+- clients
+description: Learn how to avoid disruptions during Redis server maintenance.
+linkTitle: Seamless client experience
+title: Seamless client experience
+weight: 50
+---
+
+*Seamless client experience (SCE)* is a feature of Redis Cloud and
+Redis Enterprise servers that lets them actively notify clients
+about planned server maintenance shortly before it happens. This
+lets a client reconnect or otherwise respond gracefully without significant
+interruptions in service.
+
+SCE is primarily useful when server software or hardware is upgraded.
+Upgrades tend to impact the general performance of the server, so
+advance notification of the upgrade lets a client adjust its command
+timeouts to take this into account. Upgrades also involve migrating
+Redis shards to new nodes, which inevitably disconnects clients from
+existing nodes. However, with some advance warning of the disconnection,
+a client can buffer commands, connect to a new node, and then resume
+the buffered commands without aborting any of them. As a result, users
+see no disruption in service.
+
+## Enable SCE
+
+SCE is enabled by default on Redis Cloud, but you must enable it
+explicitly on Redis Enterprise servers.
+
+You must also configure SCE explicitly on the client side during connection.
+See the pages linked below to learn how to enable SCE for:
+
+- [redis-py]({{< relref "/develop/clients/redis-py/connect#connect-using-seamless-client-experience-sce" >}})
+- [node-redis]({{< relref "/develop/clients/nodejs/connect#connect-using-seamless-client-experience-sce" >}})
+- [Jedis]({{< relref "/develop/clients/jedis/connect#connect-using-seamless-client-experience-sce" >}})
+- [Lettuce]({{< relref "/develop/clients/lettuce/connect#connect-using-seamless-client-experience-sce" >}})
+- [go-redis]({{< relref "/develop/clients/go/   connect#connect-using-seamless-client-experience-sce" >}})