REST Resource: projects.locations.collections.dataStores.servingConfigs

Resource: ServingConfig

Configures metadata that is used to generate serving time results (e.g. search results or recommendation predictions). The ServingConfig is passed in the search and predict request and generates results.

JSON representation 
{
  "name": string,
  "displayName": string,
  "solutionType": enum (SolutionType),
  "modelId": string,
  "diversityLevel": string,
  "embeddingConfig": {
    object (EmbeddingConfig)
  },
  "rankingExpression": string,
  "createTime": string,
  "updateTime": string,
  "filterControlIds": [
    string
  ],
  "boostControlIds": [
    string
  ],
  "redirectControlIds": [
    string
  ],
  "synonymsControlIds": [
    string
  ],
  "onewaySynonymsControlIds": [
    string
  ],
  "dissociateControlIds": [
    string
  ],
  "replacementControlIds": [
    string
  ],
  "ignoreControlIds": [
    string
  ],
  "promoteControlIds": [
    string
  ],
  "personalizationSpec": {
    object (PersonalizationSpec)
  },

  // Union field vertical_config can be only one of the following:
  "mediaConfig": {
    object (MediaConfig)
  },
  "genericConfig": {
    object (GenericConfig)
  }
  // End of list of possible types for union field vertical_config.
}
Fields
name

string

Immutable. Fully qualified name projects/{project}/locations/{location}/collections/{collectionId}/engines/{engineId}/servingConfigs/{servingConfigId}
displayName

string

Required. The human readable serving config display name. Used in Discovery UI.

This field must be a UTF-8 encoded string with a length limit of 128 characters. Otherwise, an INVALID_ARGUMENT error is returned.
solutionType

enum (SolutionType)

Required. Immutable. Specifies the solution type that a serving config can be associated with.
modelId

string

The id of the model to use at serving time. Currently only RecommendationModels are supported. Can be changed but only to a compatible model (e.g. others-you-may-like CTR to others-you-may-like CVR).

Required when SolutionType is SOLUTION_TYPE_RECOMMENDATION.
diversityLevel

string

How much diversity to use in recommendation model results e.g. medium-diversity or high-diversity. Currently supported values:

  • no-diversity
  • low-diversity
  • medium-diversity
  • high-diversity
  • auto-diversity

If not specified, we choose default based on recommendation model type. Default value: no-diversity.

Can only be set if SolutionType is SOLUTION_TYPE_RECOMMENDATION.
embeddingConfig

object (EmbeddingConfig)

Bring your own embedding config. The config is used for search semantic retrieval. The retrieval is based on the dot product of SearchRequest.EmbeddingSpec.EmbeddingVector.vector and the document embeddings that are provided by this EmbeddingConfig. If SearchRequest.EmbeddingSpec.EmbeddingVector.vector is provided, it overrides this ServingConfig.embedding_config.
rankingExpression

string

The ranking expression controls the customized ranking on retrieval documents. To leverage this, document embedding is required. The ranking expression setting in ServingConfig applies to all search requests served by the serving config. However, if SearchRequest.ranking_expression is specified, it overrides the ServingConfig ranking expression.

The ranking expression is a single function or multiple functions that are joined by "+".

  • rankingExpression = function, { " + ", function };

Supported functions:

  • double * relevanceScore
  • double * dotProduct(embedding_field_path)

Function variables:

  • relevanceScore: pre-defined keywords, used for measure relevance between query and document.
  • embedding_field_path: the document embedding field used with query embedding vector.
  • dotProduct: embedding function between embedding_field_path and query embedding vector.

Example ranking expression:

If document has an embedding field doc_embedding, the ranking expression could be 0.5 * relevanceScore + 0.3 * dotProduct(doc_embedding).
createTime

string (Timestamp format)

Output only. ServingConfig created timestamp.

A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples: "2014-10-02T15:01:23Z" and "2014-10-02T15:01:23.045123456Z".
updateTime

string (Timestamp format)

Output only. ServingConfig updated timestamp.

A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples: "2014-10-02T15:01:23Z" and "2014-10-02T15:01:23.045123456Z".
filterControlIds[]

string

Filter controls to use in serving path. All triggered filter controls will be applied. Filter controls must be in the same data store as the serving config. Maximum of 20 filter controls.
boostControlIds[]

string

Boost controls to use in serving path. All triggered boost controls will be applied. Boost controls must be in the same data store as the serving config. Maximum of 20 boost controls.
redirectControlIds[]

string

IDs of the redirect controls. Only the first triggered redirect action is applied, even if multiple apply. Maximum number of specifications is 100.

Can only be set if SolutionType is SOLUTION_TYPE_SEARCH.
synonymsControlIds[]

string

Condition synonyms specifications. If multiple synonyms conditions match, all matching synonyms controls in the list will execute. Maximum number of specifications is 100.

Can only be set if SolutionType is SOLUTION_TYPE_SEARCH.
onewaySynonymsControlIds[]

string

Condition oneway synonyms specifications. If multiple oneway synonyms conditions match, all matching oneway synonyms controls in the list will execute. Maximum number of specifications is 100.

Can only be set if SolutionType is SOLUTION_TYPE_SEARCH.
dissociateControlIds[]

string

Condition do not associate specifications. If multiple do not associate conditions match, all matching do not associate controls in the list will execute. Order does not matter. Maximum number of specifications is 100.

Can only be set if SolutionType is SOLUTION_TYPE_SEARCH.
replacementControlIds[]

string

Condition replacement specifications. Applied according to the order in the list. A previously replaced term can not be re-replaced. Maximum number of specifications is 100.

Can only be set if SolutionType is SOLUTION_TYPE_SEARCH.
ignoreControlIds[]

string

Condition ignore specifications. If multiple ignore conditions match, all matching ignore controls in the list will execute. Order does not matter. Maximum number of specifications is 100.
promoteControlIds[]

string

Condition promote specifications.

Maximum number of specifications is 100.
personalizationSpec

object (PersonalizationSpec)

The specification for personalization spec.

Notice that if both ServingConfig.personalization_spec and SearchRequest.personalization_spec are set, SearchRequest.personalization_spec overrides ServingConfig.personalization_spec.
Union field vertical_config. Industry vertical specific config. vertical_config can be only one of the following:
mediaConfig

object (MediaConfig)

The MediaConfig of the serving configuration.
genericConfig

object (GenericConfig)

The GenericConfig of the serving configuration.

MediaConfig

Specifies the configurations needed for Media Discovery. Currently we support:

  • demote_content_watched: Threshold for watched content demotion. Customers can specify if using watched content demotion or use viewed detail page. Using the content watched demotion, customers need to specify the watched minutes or percentage exceeds the threshold, the content will be demoted in the recommendation result.
  • promote_fresh_content: cutoff days for fresh content promotion. Customers can specify if using content freshness promotion. If the content was published within the cutoff days, the content will be promoted in the recommendation result. Can only be set if SolutionType is SOLUTION_TYPE_RECOMMENDATION.
JSON representation 
{
  "demotionEventType": string,
  "demoteContentWatchedPastDays": integer,
  "contentFreshnessCutoffDays": integer,

  // Union field demote_content_watched can be only one of the following:
  "contentWatchedPercentageThreshold": number,
  "contentWatchedSecondsThreshold": number
  // End of list of possible types for union field demote_content_watched.
}
Fields
demotionEventType

string

Specifies the event type used for demoting recommendation result. Currently supported values:

  • view-item: Item viewed.
  • media-play: Start/resume watching a video, playing a song, etc.
  • media-complete: Finished or stopped midway through a video, song, etc.

If unset, watch history demotion will not be applied. Content freshness demotion will still be applied.
demoteContentWatchedPastDays

integer

Optional. Specifies the number of days to look back for demoting watched content. If set to zero or unset, defaults to the maximum of 365 days.
contentFreshnessCutoffDays

integer

Specifies the content freshness used for recommendation result. Contents will be demoted if contents were published for more than content freshness cutoff days.
Union field demote_content_watched. Specify the threshold for demoting watched content, the threshold can be either percentage or minutes value. This must be set for media-complete event type. demote_content_watched can be only one of the following:
contentWatchedPercentageThreshold

number

Specifies the content watched percentage threshold for demotion. Threshold value must be between [0, 1.0] inclusive.
contentWatchedSecondsThreshold

number

Specifies the content watched minutes threshold for demotion.

GenericConfig

Specifies the configurations needed for Generic Discovery.Currently we support:

  • contentSearchSpec: configuration for generic content search.
JSON representation 
{
  "contentSearchSpec": {
    object (ContentSearchSpec)
  }
}
Fields
contentSearchSpec

object (ContentSearchSpec)

Specifies the expected behavior of content search. Only valid for content-search enabled data store.

EmbeddingConfig

Defines embedding config, used for bring your own embeddings feature.

JSON representation 
{
  "fieldPath": string
}
Fields
fieldPath

string

Full field path in the schema mapped as embedding field.

Methods

answer

 Answer query method.

get

 Gets a ServingConfig.

list

 Lists all ServingConfigs linked to this dataStore.

patch

 Updates a ServingConfig.

recommend

 Makes a recommendation, which requires a contextual user event.
Performs a search.

searchLite

 Performs a search.

streamAnswer

 Answer query method (streaming).