Package io.envoyproxy.envoy.extensions.load_balancing_policies.ring_hash.v3

Class RingHash

  • All Implemented Interfaces:
    com.google.protobuf.Message, com.google.protobuf.MessageLite, com.google.protobuf.MessageLiteOrBuilder, com.google.protobuf.MessageOrBuilder, RingHashOrBuilder, Serializable
    public final class RingHash
extends com.google.protobuf.GeneratedMessageV3
implements RingHashOrBuilder
     This configuration allows the built-in RING_HASH LB policy to be configured via the LB policy
 extension point. See the :ref:`load balancing architecture overview
 <arch_overview_load_balancing_types>` for more information.
 [#extension: envoy.clusters.lb_policy]
 [#next-free-field: 6]
    Protobuf type envoy.extensions.load_balancing_policies.ring_hash.v3.RingHash
    See Also:
    Serialized Form

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  RingHash.Builder
      This configuration allows the built-in RING_HASH LB policy to be configured via the LB policy extension point.
      static class  RingHash.HashFunction
      The hash function used to hash hosts onto the ketama ring.

      • Nested classes/interfaces inherited from class com.google.protobuf.GeneratedMessageV3

        com.google.protobuf.GeneratedMessageV3.BuilderParent, com.google.protobuf.GeneratedMessageV3.ExtendableBuilder<MessageType extends com.google.protobuf.GeneratedMessageV3.ExtendableMessage,​BuilderType extends com.google.protobuf.GeneratedMessageV3.ExtendableBuilder<MessageType,​BuilderType>>, com.google.protobuf.GeneratedMessageV3.ExtendableMessage<MessageType extends com.google.protobuf.GeneratedMessageV3.ExtendableMessage>, com.google.protobuf.GeneratedMessageV3.ExtendableMessageOrBuilder<MessageType extends com.google.protobuf.GeneratedMessageV3.ExtendableMessage>, com.google.protobuf.GeneratedMessageV3.FieldAccessorTable, com.google.protobuf.GeneratedMessageV3.UnusedPrivateParameter

      • Nested classes/interfaces inherited from class com.google.protobuf.AbstractMessageLite

        com.google.protobuf.AbstractMessageLite.InternalOneOfEnum

    • Field Detail

      • HASH_FUNCTION_FIELD_NUMBER

        public static final int HASH_FUNCTION_FIELD_NUMBER
        See Also:
        Constant Field Values

      • MINIMUM_RING_SIZE_FIELD_NUMBER

        public static final int MINIMUM_RING_SIZE_FIELD_NUMBER
        See Also:
        Constant Field Values

      • MAXIMUM_RING_SIZE_FIELD_NUMBER

        public static final int MAXIMUM_RING_SIZE_FIELD_NUMBER
        See Also:
        Constant Field Values

      • USE_HOSTNAME_FOR_HASHING_FIELD_NUMBER

        public static final int USE_HOSTNAME_FOR_HASHING_FIELD_NUMBER
        See Also:
        Constant Field Values

      • HASH_BALANCE_FACTOR_FIELD_NUMBER

        public static final int HASH_BALANCE_FACTOR_FIELD_NUMBER
        See Also:
        Constant Field Values

    • Method Detail

      • newInstance

        protected Object newInstance​(com.google.protobuf.GeneratedMessageV3.UnusedPrivateParameter unused)
        Overrides:
        newInstance in class com.google.protobuf.GeneratedMessageV3

      • getUnknownFields

        public final com.google.protobuf.UnknownFieldSet getUnknownFields()
        Specified by:
        getUnknownFields in interface com.google.protobuf.MessageOrBuilder
        Overrides:
        getUnknownFields in class com.google.protobuf.GeneratedMessageV3

      • getDescriptor

        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor()

      • internalGetFieldAccessorTable

        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable internalGetFieldAccessorTable()
        Specified by:
        internalGetFieldAccessorTable in class com.google.protobuf.GeneratedMessageV3

      • getHashFunctionValue

        public int getHashFunctionValue()
         The hash function used to hash hosts onto the ketama ring. The value defaults to
 :ref:`XX_HASH<envoy_v3_api_enum_value_config.cluster.v3.Cluster.RingHashLbConfig.HashFunction.XX_HASH>`.
        .envoy.extensions.load_balancing_policies.ring_hash.v3.RingHash.HashFunction hash_function = 1 [(.validate.rules) = { ... }
        Specified by:
        getHashFunctionValue in interface RingHashOrBuilder
        Returns:
        The enum numeric value on the wire for hashFunction.

      • getHashFunction

        public RingHash.HashFunction getHashFunction()
         The hash function used to hash hosts onto the ketama ring. The value defaults to
 :ref:`XX_HASH<envoy_v3_api_enum_value_config.cluster.v3.Cluster.RingHashLbConfig.HashFunction.XX_HASH>`.
        .envoy.extensions.load_balancing_policies.ring_hash.v3.RingHash.HashFunction hash_function = 1 [(.validate.rules) = { ... }
        Specified by:
        getHashFunction in interface RingHashOrBuilder
        Returns:
        The hashFunction.

      • hasMinimumRingSize

        public boolean hasMinimumRingSize()
         Minimum hash ring size. The larger the ring is (that is, the more hashes there are for each
 provided host) the better the request distribution will reflect the desired weights. Defaults
 to 1024 entries, and limited to 8M entries. See also
 :ref:`maximum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.maximum_ring_size>`.
        .google.protobuf.UInt64Value minimum_ring_size = 2 [(.validate.rules) = { ... }
        Specified by:
        hasMinimumRingSize in interface RingHashOrBuilder
        Returns:
        Whether the minimumRingSize field is set.

      • getMinimumRingSize

        public com.google.protobuf.UInt64Value getMinimumRingSize()
         Minimum hash ring size. The larger the ring is (that is, the more hashes there are for each
 provided host) the better the request distribution will reflect the desired weights. Defaults
 to 1024 entries, and limited to 8M entries. See also
 :ref:`maximum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.maximum_ring_size>`.
        .google.protobuf.UInt64Value minimum_ring_size = 2 [(.validate.rules) = { ... }
        Specified by:
        getMinimumRingSize in interface RingHashOrBuilder
        Returns:
        The minimumRingSize.

      • getMinimumRingSizeOrBuilder

        public com.google.protobuf.UInt64ValueOrBuilder getMinimumRingSizeOrBuilder()
         Minimum hash ring size. The larger the ring is (that is, the more hashes there are for each
 provided host) the better the request distribution will reflect the desired weights. Defaults
 to 1024 entries, and limited to 8M entries. See also
 :ref:`maximum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.maximum_ring_size>`.
        .google.protobuf.UInt64Value minimum_ring_size = 2 [(.validate.rules) = { ... }
        Specified by:
        getMinimumRingSizeOrBuilder in interface RingHashOrBuilder

      • hasMaximumRingSize

        public boolean hasMaximumRingSize()
         Maximum hash ring size. Defaults to 8M entries, and limited to 8M entries, but can be lowered
 to further constrain resource use. See also
 :ref:`minimum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.minimum_ring_size>`.
        .google.protobuf.UInt64Value maximum_ring_size = 3 [(.validate.rules) = { ... }
        Specified by:
        hasMaximumRingSize in interface RingHashOrBuilder
        Returns:
        Whether the maximumRingSize field is set.

      • getMaximumRingSize

        public com.google.protobuf.UInt64Value getMaximumRingSize()
         Maximum hash ring size. Defaults to 8M entries, and limited to 8M entries, but can be lowered
 to further constrain resource use. See also
 :ref:`minimum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.minimum_ring_size>`.
        .google.protobuf.UInt64Value maximum_ring_size = 3 [(.validate.rules) = { ... }
        Specified by:
        getMaximumRingSize in interface RingHashOrBuilder
        Returns:
        The maximumRingSize.

      • getMaximumRingSizeOrBuilder

        public com.google.protobuf.UInt64ValueOrBuilder getMaximumRingSizeOrBuilder()
         Maximum hash ring size. Defaults to 8M entries, and limited to 8M entries, but can be lowered
 to further constrain resource use. See also
 :ref:`minimum_ring_size<envoy_v3_api_field_config.cluster.v3.Cluster.RingHashLbConfig.minimum_ring_size>`.
        .google.protobuf.UInt64Value maximum_ring_size = 3 [(.validate.rules) = { ... }
        Specified by:
        getMaximumRingSizeOrBuilder in interface RingHashOrBuilder

      • getUseHostnameForHashing

        public boolean getUseHostnameForHashing()
         If set to `true`, the cluster will use hostname instead of the resolved
 address as the key to consistently hash to an upstream host. Only valid for StrictDNS clusters with hostnames which resolve to a single IP address.
        bool use_hostname_for_hashing = 4;
        Specified by:
        getUseHostnameForHashing in interface RingHashOrBuilder
        Returns:
        The useHostnameForHashing.

      • hasHashBalanceFactor

        public boolean hasHashBalanceFactor()
         Configures percentage of average cluster load to bound per upstream host. For example, with a value of 150
 no upstream host will get a load more than 1.5 times the average load of all the hosts in the cluster.
 If not specified, the load is not bounded for any upstream host. Typical value for this parameter is between 120 and 200.
 Minimum is 100.
 This is implemented based on the method described in the paper https://arxiv.org/abs/1608.01350. For the specified
 `hash_balance_factor`, requests to any upstream host are capped at `hash_balance_factor/100` times the average number of requests
 across the cluster. When a request arrives for an upstream host that is currently serving at its max capacity, linear probing
 is used to identify an eligible host. Further, the linear probe is implemented using a random jump in hosts ring/table to identify
 the eligible host (this technique is as described in the paper https://arxiv.org/abs/1908.08762 - the random jump avoids the
 cascading overflow effect when choosing the next host in the ring/table).
 If weights are specified on the hosts, they are respected.
 This is an O(N) algorithm, unlike other load balancers. Using a lower `hash_balance_factor` results in more hosts
 being probed, so use a higher value if you require better performance.
        .google.protobuf.UInt32Value hash_balance_factor = 5 [(.validate.rules) = { ... }
        Specified by:
        hasHashBalanceFactor in interface RingHashOrBuilder
        Returns:
        Whether the hashBalanceFactor field is set.

      • getHashBalanceFactor

        public com.google.protobuf.UInt32Value getHashBalanceFactor()
         Configures percentage of average cluster load to bound per upstream host. For example, with a value of 150
 no upstream host will get a load more than 1.5 times the average load of all the hosts in the cluster.
 If not specified, the load is not bounded for any upstream host. Typical value for this parameter is between 120 and 200.
 Minimum is 100.
 This is implemented based on the method described in the paper https://arxiv.org/abs/1608.01350. For the specified
 `hash_balance_factor`, requests to any upstream host are capped at `hash_balance_factor/100` times the average number of requests
 across the cluster. When a request arrives for an upstream host that is currently serving at its max capacity, linear probing
 is used to identify an eligible host. Further, the linear probe is implemented using a random jump in hosts ring/table to identify
 the eligible host (this technique is as described in the paper https://arxiv.org/abs/1908.08762 - the random jump avoids the
 cascading overflow effect when choosing the next host in the ring/table).
 If weights are specified on the hosts, they are respected.
 This is an O(N) algorithm, unlike other load balancers. Using a lower `hash_balance_factor` results in more hosts
 being probed, so use a higher value if you require better performance.
        .google.protobuf.UInt32Value hash_balance_factor = 5 [(.validate.rules) = { ... }
        Specified by:
        getHashBalanceFactor in interface RingHashOrBuilder
        Returns:
        The hashBalanceFactor.

      • getHashBalanceFactorOrBuilder

        public com.google.protobuf.UInt32ValueOrBuilder getHashBalanceFactorOrBuilder()
         Configures percentage of average cluster load to bound per upstream host. For example, with a value of 150
 no upstream host will get a load more than 1.5 times the average load of all the hosts in the cluster.
 If not specified, the load is not bounded for any upstream host. Typical value for this parameter is between 120 and 200.
 Minimum is 100.
 This is implemented based on the method described in the paper https://arxiv.org/abs/1608.01350. For the specified
 `hash_balance_factor`, requests to any upstream host are capped at `hash_balance_factor/100` times the average number of requests
 across the cluster. When a request arrives for an upstream host that is currently serving at its max capacity, linear probing
 is used to identify an eligible host. Further, the linear probe is implemented using a random jump in hosts ring/table to identify
 the eligible host (this technique is as described in the paper https://arxiv.org/abs/1908.08762 - the random jump avoids the
 cascading overflow effect when choosing the next host in the ring/table).
 If weights are specified on the hosts, they are respected.
 This is an O(N) algorithm, unlike other load balancers. Using a lower `hash_balance_factor` results in more hosts
 being probed, so use a higher value if you require better performance.
        .google.protobuf.UInt32Value hash_balance_factor = 5 [(.validate.rules) = { ... }
        Specified by:
        getHashBalanceFactorOrBuilder in interface RingHashOrBuilder

      • isInitialized

        public final boolean isInitialized()
        Specified by:
        isInitialized in interface com.google.protobuf.MessageLiteOrBuilder
        Overrides:
        isInitialized in class com.google.protobuf.GeneratedMessageV3

      • writeTo

        public void writeTo​(com.google.protobuf.CodedOutputStream output)
             throws IOException
        Specified by:
        writeTo in interface com.google.protobuf.MessageLite
        Overrides:
        writeTo in class com.google.protobuf.GeneratedMessageV3
        Throws:
        IOException

      • getSerializedSize

        public int getSerializedSize()
        Specified by:
        getSerializedSize in interface com.google.protobuf.MessageLite
        Overrides:
        getSerializedSize in class com.google.protobuf.GeneratedMessageV3

      • equals

        public boolean equals​(Object obj)
        Specified by:
        equals in interface com.google.protobuf.Message
        Overrides:
        equals in class com.google.protobuf.AbstractMessage

      • hashCode

        public int hashCode()
        Specified by:
        hashCode in interface com.google.protobuf.Message
        Overrides:
        hashCode in class com.google.protobuf.AbstractMessage

      • parseFrom

        public static RingHash parseFrom​(ByteBuffer data)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(ByteBuffer data,
                                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(com.google.protobuf.ByteString data)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(com.google.protobuf.ByteString data,
                                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(byte[] data)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(byte[] data,
                                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                          throws com.google.protobuf.InvalidProtocolBufferException
        Throws:
        com.google.protobuf.InvalidProtocolBufferException

      • parseFrom

        public static RingHash parseFrom​(com.google.protobuf.CodedInputStream input,
                                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                          throws IOException
        Throws:
        IOException

      • newBuilderForType

        public RingHash.Builder newBuilderForType()
        Specified by:
        newBuilderForType in interface com.google.protobuf.Message
        Specified by:
        newBuilderForType in interface com.google.protobuf.MessageLite

      • toBuilder

        public RingHash.Builder toBuilder()
        Specified by:
        toBuilder in interface com.google.protobuf.Message
        Specified by:
        toBuilder in interface com.google.protobuf.MessageLite

      • newBuilderForType

        protected RingHash.Builder newBuilderForType​(com.google.protobuf.GeneratedMessageV3.BuilderParent parent)
        Specified by:
        newBuilderForType in class com.google.protobuf.GeneratedMessageV3

      • getDefaultInstance

        public static RingHash getDefaultInstance()

      • parser

        public static com.google.protobuf.Parser<RingHash> parser()

      • getParserForType

        public com.google.protobuf.Parser<RingHash> getParserForType()
        Specified by:
        getParserForType in interface com.google.protobuf.Message
        Specified by:
        getParserForType in interface com.google.protobuf.MessageLite
        Overrides:
        getParserForType in class com.google.protobuf.GeneratedMessageV3

      • getDefaultInstanceForType

        public RingHash getDefaultInstanceForType()
        Specified by:
        getDefaultInstanceForType in interface com.google.protobuf.MessageLiteOrBuilder
        Specified by:
        getDefaultInstanceForType in interface com.google.protobuf.MessageOrBuilder