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• Create a znode (or modify existing) under the required path with the configs that you want to update. Example, if you want to change quotas for producer "Adi", add a path under /config/producers/Adi as shown below.
• Create a sequential znode under "config/changes/config_change_XX". This will send a notification to all the watchers. The data within the change node should indicate what has changed i.e. topic config + topic name, client config + clientId or broker config + brokerId.
• The brokers process the changed configs.

Config Precedence

These configs in Zookeeper will override any configuration read from the properties file.

Modeling Default values

In addition to overrides, we also need a mechanism to model default configuration. For example: say we have default quotas for all clients and we need to selectively override them on a per-client basis. So far, we don't have a way to change the the default values. We can do this by having a special path to store defaults.

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