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Per-IP connection creation rate quota will be configured as a dynamic quota for entity type IPs ips.

• Default quota for <IPs> will be stored in Zookeeper at /config/IPsips/<default>
• Quota for a specific IP address for which quota override is defined will be stored in Zookeeper at /config/IPsips/<ip-address>

If per-IP or default IP quota is not configured, we will use Int.MaxValue as a default to ensure backward compatibility.

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/**
 * Describes a client quota entity, which is a mapping of entity types to their names.
 */
public class ClientQuotaEntity {
 
    /**
     * The type of an entity entry.
     */
    public static final String USER = "user";
    public static final String CLIENT_ID = "client-id";
	public static final String IP = "IPip";
}

Since IP quotas are orthogonal with user/client ID quotas the following is to disambiguate how the new IP entity will interact with the existing client-id and user entities.

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bin/kafka-configs  --bootstrap-server localhost:9091 --alter --add-config 'connection_creation_rate=100' --entity-name 93.284.53.13 --entity-type IPsips

bin/kafka-configs  --bootstrap-server localhost:9091 --alter --add-config 'connection_creation_rate=100' --ip 93.284.53.13

Default connection rate quotas for an IP address can be configured by omitting entity name. For examplevia the following:

bin/kafka-configs  --bootstrap-server localhost:9091 --alter --add-config 'connection_creation_rate=100' --entity-type IPsips --entity-default

bin/kafka-configs  --bootstrap-server localhost:9091 --alter --add-config 'connection_creation_rate=100' --ip-defaults

Connection rate throttling behavior

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