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Fusion 5.12
    Fusion 5.12

    Spark Jobs

    Apache Spark can power a wide variety of data analysis jobs. In Fusion, Spark jobs are especially useful for generating recommendations.

    Spark job subtypes

    For the Spark job type, the available subtypes are listed below.

    • SQL Aggregation job

      A Spark SQL aggregation job where user-defined parameters are injected into a built-in SQL template at runtime.

    • Custom Python job

      The Custom Python job provides user the ability to run Python code via Fusion. This job supports Python 3.6+ code.

    • Script

      Run a custom Scala script as a Fusion job.

    See Additional Spark jobs for more information.

    Spark job configuration

    Spark jobs can be created and modified using the Fusion UI or the Spark Jobs API. They can be scheduled using the Fusion UI or the Spark Jobs API.

    For the complete list of configuration parameters for all Spark job subtypes, see the Jobs Configuration Reference.

    Machine learning jobs

    Fusion provides these job types to perform machine learning tasks.

    Lucidworks offers free training to help you get started with Fusion. Check out the Machine Learning in Fusion course, which focuses on the basics about machine learning jobs in Fusion:

    Machine Learning in Fusion

    Visit the LucidAcademy to see the full training catalog.

    Signals analysis

    These jobs analyze a collection of signals in order to perform query rewriting, signals aggregation, or experiment analysis.

    • Ground Truth

      Ground truth or gold standard datasets are used in the ground truth jobs and query relevance metrics to define a specific set of documents.

    Ground truth jobs estimate ground truth queries using click signals and query signals, with document relevance per query determined using a click/skip formula.

    Use this job along with the Ranking Metrics job to calculate relevance metrics, such as Normalized Discounted Cumulative Gain (nDCG).

    To create a ground truth job, sign in to Fusion and click Collections > Jobs. Then click Add+ and in the Experiment Evaluation Jobs section, select Ground Truth. You can enter basic and advanced parameters to configure the job. If the field has a default value, it is populated when you click to add the job.

    Basic parameters

    To enter advanced parameters in the UI, click Advanced. Those parameters are described in the advanced parameters section.

    • Spark job ID. The unique ID for the Spark job that references this job in the API. This is the id field in the configuration file. Required field.

    • Input/Output Parameters. This section includes the Signals collection field, which is the Solr collection that contains click signals and its associated search log identifier. This is the signalsCollection field in the configuration file. Required field.

    Advanced parameters

    If you click the Advanced toggle, the following optional fields are displayed in the UI.

    • Spark Settings. This section lets you enter parameter name:parameter value options to use in this job. This is the sparkConfig field in the configuration file.

    • Additional Options. This section includes the following options:

      • Search logs pipeline. The pipeline ID associated with search log entries. This is the searchLogsPipeline field in the configuration file.

      • Join key (query signals). The common key that joins the query signals in the signals collection. This is the joinKeySignals field in the configuration file.

      • Join key (click signals). The common key that joins the click signals in the signals collection. This is the joinKeySignals field in the configuration file.

      • Search logs and options. This section lets you enter property name:property value options to when loading the search logs collection. This is the searchLogsAddOpts field in the configuration file.

      • Additional signals options. This section lets you enter property name:property value options when loading the signals collection. This is the signalsAddOpts field in the configuration file.

      • Filter queries. The array[string] filter query to apply when selecting top queries from the query signals in the signals collection. This is the filterQueries field in the configuration file.

      • Top queries limit. The total number of queries to select for ground truth calculations when this job is run. This is the topQueriesLimit field in the configuration file.

    For more information, see Ground truth query rewrite API configurations.

    Query rewriting

    These jobs produce data that can be used for query rewriting or to inform updates to the synonyms.txt file.

    • Head/Tail Analysis

      Perform head/tail analysis of queries from collections of raw or aggregated signals, to identify underperforming queries and the reasons. This information is valuable for improving overall conversions, Solr configurations, auto-suggest, product catalogs, and SEO/SEM strategies, in order to improve conversion rates.

    • Phrase Extraction

      Identify multi-word phrases in signals.

    • Synonym Detection Jobs

      Use this job to generate pairs of synonyms and pairs of similar queries. Two words are considered potential synonyms when they are used in a similar context in similar queries.

    • Token and Phrase Spell Correction

      Detect misspellings in queries or documents using the numbers of occurrences of words and phrases.

    Signals aggregation

    • SQL Aggregation

      A Spark SQL aggregation job where user-defined parameters are injected into a built-in SQL template at runtime.

    Experiment analysis

    • Ranking Metrics

      Calculate relevance metrics (nDCG and so on) by replaying ground truth queries against catalog data using variants from an experiment.

    Collaborative recommenders

    These jobs analyze signals and generate matrices used to provide collaborative recommendations.

    • BPR Recommender

      Use this job when you want to compute user recommendations or item similarities using a Bayesian Personalized Ranking (BPR) recommender algorithm.

    • Query-to-Query Session-Based Similarity jobs

      This recommender is based on co-occurrence of queries in the context of clicked documents and sessions. It is useful when your data shows that users tend to search for similar items in a single search session. This method of generating query-to-query recommendations is faster and more reliable than the Query-to-Query Similarity recommender job, and is session-based unlike the similar queries previously generated as part of the Synonym Detection job.

    Content-based recommenders

    Content-based recommenders create matrices of similar items based on their content.

    • Content-Based Recommender

      Use this job when you want to compute item similarities based on their content, such as product descriptions.

    Content analysis

    • Cluster Labeling

      Cluster labeling jobs are run against your data collections, and are used:

    • When clusters or well-defined document categories already exist

    • When you want to discover and attach keywords to see representative words within existing clusters

    To create a cluster labeling job, sign in to Fusion and click Collections > Jobs. Then click Add+ and in the Clustering and Outlier Analysis Jobs section, select Cluster Labeling. You can enter basic and advanced parameters to configure the job. If the field has a default value, it is populated when you click to add the job.

    Basic parameters

    To enter advanced parameters in the UI, click Advanced. Those parameters are described in the advanced parameters section.

    • Spark job ID. The unique ID for the Spark job that references this job in the API. This is the id field in the configuration file. Required field.

    • Input/Output Parameters. This section includes these parameters:

      • Training collection. The Solr collection that contains documents associated with defined categories or clusters. The job will be run against this information. This is the trainingCollection field in the configuration file. Required field.

      • Output collection. The Solr collection where the job output is stored. The job will write the output to this collection. This is the outputCollection field in the configuration file. Required field.

      • Data format. The format that contains training data. The format must be compatible with Spark and options include solr, parquet, and orc. Required field.

    • Field Parameters. This section includes these parameters:

      • Field to detect keywords from. The field that contains the data that the job will use to discover keywords for the cluster. This is the fieldToVectorize field in the configuration file. Required field.

      • Existing document category field. The field that contains existing cluster IDs or document categories. This is the clusterIdField field in the configuration file. Required field.

      • Top frequent terms field name. The field where the job output stores top frequent terms in each cluster. Terms may overlap with other clusters. This is the freqTermField field in the configuration file. Optional field.

      • Top unique terms field name. The field where the job output stores the top frequent terms that, for the most part, are unique in each cluster. This is the clusterLabelField field in the configuration file. Optional field.

    • Model Tuning Parameters. This section includes these parameters:

      • Max doc support. The maximum number of documents that can contain the term. Values that are <1.0 indicate a percentage, 1.0 is 100 percent, and >1.0 indicates the exact number. This is the maxDF field in the configuration file. Optional field.

      • Min doc support. The minimum of documents that must contain the term. Values that are <1.0 indicate a percentage, 1.0 is 100 percent, and >1.0 indicates the exact number. This is the minDF field in the configuration file. Optional field.

      • Number of keywords for each cluster. The number of keywords required to label each cluster. This is the numKeywordsPerLabel field in the configuration file. Optional field.

    • Featurization Parameters.: This section includes this parameter:

      • Lucene analyzer schema. This is the JSON-encoded Lucene text analyzer schema used for tokenization. This is the analyzerConfig field in the configuration file. Optional field.

    Advanced parameters

    If you click the Advanced toggle, the following optional fields are displayed in the UI.

    • Spark Settings. The Spark configuration settings include:

      • Spark SQL filter query. This field contains the Spark SQL query that filters your input data. For example, SELECT * from spark_input registers the input data as spark_input. This is the sparkSQL field in the configuration file.

      • Data output format. The format for the job output. The format must be compatible with Spark and options include solr and parquet. This is the dataOutputFormat field in the configuration file.

      • Partition fields. If the job output is written to non-Solr sources, this field contains a comma-delimited list of column names that partition the dataframe before the external output is written. This is the partitionCols field in the configuration file.

    • Read Options. This section lets you enter parameter name:parameter value options to use when reading input from Solr or other sources. This is the readOptions field in the configuration file.

    • Write Options. This section lets you enter parameter name:parameter value options to use when writing output to Solr or other sources. This is the writeOptions field in the configuration file.

    • Dataframe config options. This section includes these parameters:

      • Property name:property value. Each entry defines an additional Spark dataframe loading configuration option. This is the trainingDataFrameConfigOptions field in the configuration file.

      • Training data sampling fraction. This is the fractional amount of the training data the job will use. This is the trainingDataSamplingFraction field in the configuration file.

      • Random seed. This value is used in any deterministic pseudorandom number generation to group documents into clusters based on similarities in their content. This is the randomSeed field in the configuration file.

    • Field Parameters. The advanced option adds this parameter:

      • Fields to load. This field contains a comma-delimited list of Solr fields to load. If blank, the job selects the required fields to load at runtime. This is the sourceFields field in the configuration file.

    • Miscellaneous Parameters. This section includes this parameter:

      • Model ID. The unique identifier for the model to be trained. If no value is entered, the Spark Job ID is used. This is the modelId field in the configuration file.

    To create new clusters, use the Document Clustering job.

    • Document Clustering

      The Document Clustering job uses an unsupervised machine learning algorithm to group documents into clusters based on similarities in their content. You can enable more efficient document exploration by using these clusters as facets, high-level summaries or themes, or to recommend other documents from the same cluster. The job can automatically group similar documents in all kinds of content, such as clinical trials, legal documents, book reviews, blogs, scientific papers, and products.

    • Classification job

      This job analyzes how your existing documents are categorized and produces a classification model that can be used to predict the categories of new documents at index time.

    • Outlier Detection

      Outlier detection jobs are run against your data collections, and also perform the following actions:

    • Identify information that significantly differs from other data in the collection

    • Attach labels to designate each outlier group

    To create an outlier detection job, sign in to Fusion and click Collections > Jobs. Then click Add+ and in the Clustering and Outlier Analysis Jobs section, select Outlier Detection. You can enter basic and advanced parameters to configure the job. If the field has a default value, it is populated when you click to add the job.

    Basic parameters

    To enter advanced parameters in the UI, click Advanced. Those parameters are described in the advanced parameters section.

    • Spark job ID. The unique ID for the Spark job that references this job in the API. This is the id field in the configuration file. Required field.

    • Input/Output Parameters. This section includes these parameters:

      • Training collection. The Solr collection that contains documents that will be clustered. The job will be run against this information. This is the trainingCollection field in the configuration file. Required field.

      • Output collection. The Solr collection where the job output is stored. The job will write the output to this collection. This is the outputCollection field in the configuration file. Required field.

      • Data format. The format that contains training data. The format must be compatible with Spark and options include solr, parquet, and orc. This is the dataFormat field in the configuration file. Required field.

    • Only save outliers? If this checkbox is selected (set to true), only outliers are saved in the job’s output collection. If not selected (set to false), the entire dataset is saved in the job’s output collection. This is the outputOutliersOnly field in the configuration file. Optional field.

    • Field Parameters. This section includes these parameters:

      • Field to vectorize. The Solr field that contains text training data. To combine data from multiple fields with different weights, enter field1:weight1,field2:weight2, etc. This is the fieldToVectorize field in the configuration file. Required field.

      • ID field name. The unique ID for each document. This is the uidField field in the configuration file. Required field.

      • Output field name for outlier group ID. The field that contains the ID for the outlier group. This is the outlierGroupIdField field in the configuration file. Optional field.

      • Top unique terms field name. The field where the job output stores the top frequent terms that, for the most part, are unique for each outlier group. The information is computed based on term frequency-inverse document frequency (TF-IDF) and group ID. This is the outlierGroupLabelField field in the configuration file. Optional field.

      • Top frequent terms field name. The field where the job output stores top frequent terms in each cluster. Terms may overlap with other clusters. This is the freqTermField field in the configuration file. Optional field.

      • Output field name for doc distance to its corresponding cluster center. The field that contains the document’s distance from the center of its cluster. This is based on the arithmetic mean of all of the documents in the cluster. This denotes how representative the document is in the cluster. This is the distToCenterField field in the configuration file. Optional field.

    • Model Tuning Parameters. This section includes these parameters:

      • Max doc support. The maximum number of documents that can contain the term. Values that are <1.0 indicate a percentage, 1.0 is 100 percent, and >1.0 indicates the exact number. This is the maxDF field in the configuration file. Optional field.

      • Min doc support. The minimum number of documents that must contain the term. Values that are <1.0 indicate a percentage, 1.0 is 100 percent, and >1.0 indicates the exact number. This is the minDF field in the configuration file. Optional field.

      • Number of keywords for each cluster. The number of keywords required to label each cluster. This is the numKeywordsPerLabel field in the configuration file. Optional field.

    • Featurization Parameters.: This section includes the following parameter:

      • Lucene analyzer schema. This is the JSON-encoded Lucene text analyzer schema used for tokenization. This is the analyzerConfig field in the configuration file. Optional field.

    Advanced parameters

    If you click the Advanced toggle, the following optional fields are displayed in the UI.

    • Spark Settings. The Spark configuration settings include the following:

      • Spark SQL filter query. This field contains the Spark SQL query that filters your input data. For example, SELECT * from spark_input registers the input data as spark_input. This is the sparkSQL field in the configuration file.

      • Data output format. The format for the job output. The format must be compatible with Spark and options include solr and parquet. This is the dataOutputFormat field in the configuration file.

      • Partition fields. If the job output is written to non-Solr sources, this field contains a comma-delimited list of column names that partition the dataframe before the external output is written. This is the partitionCols field in the configuration file.

    • Input/Output Parameters. This advanced option adds these parameters:

      • Training data filter query. If Solr is used, this field contains the Solr query executed to load training data. This is the trainingDataFilterQuery field in the configuration file.

    • Read Options. This section lets you enter parameter name:parameter value options to use when reading input from Solr or other sources. This is the readOptions field in the configuration file.

    • Write Options. This section lets you enter parameter name:parameter value options to use when writing output to Solr or other sources. This is the writeOptions field in the configuration file.

    • Dataframe config options. This section includes these parameters:

      • Property name:property value. Each entry defines an additional Spark dataframe loading configuration option. This is the trainingDataFrameConfigOptions field in the configuration file.

      • Training data sampling fraction. This is the fractional amount of the training data the job will use. This is the trainingDataSamplingFraction field in the configuration file.

      • Random seed. This value is used in any deterministic pseudorandom number generation to group documents into clusters based on similarities in their content. This is the randomSeed field in the configuration file.

    • Field Parameters. The advanced option adds this parameter:

      • Fields to load. This field contains a comma-delimited list of Solr fields to load. If blank, the job selects the required fields to load at runtime. This is the sourceFields field in the configuration file.

    • Model Tuning Parameters. The advanced option adds these parameters:

      • Number of outlier groups. The number of clusters to help find outliers. This is the outlierK field in the configuration file.

      • Outlier cutoff. The fraction out of the total documents to designate as an outlier group. Values that are <1.0 indicate a percentage, 1.0 is 100 percent, and >1.0 indicates the exact number. This is the outlierThreshold field in the configuration file.

      • Vector normalization. The p-norm value used to normalize vectors. A value of -1 turns off normalization. This is the norm field in the configuration file.

    • Miscellaneous Parameters. This section includes this parameter:

      • Model ID. The unique identifier for the model to be trained. If no value is entered, the Spark Job ID is used. This is the modelId field in the configuration file.

    Data ingest

    • Parallel Bulk Loader

      The Parallel Bulk Loader (PBL) job enables bulk ingestion of structured and semi-structured data from big data systems, NoSQL databases, and common file formats like Parquet and Avro.