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DSE 6.0 Developer Guide (EOSL)

Getting started
Information about developing applications for DataStax Enterprise.
Release notes
Release notes for DataStax Enterprise.
Installing
DataStax Enterprise 6.0 can be installed in a number of ways, depending on the purpose of the installation, the type of operating system, and the available permissions.
Configuration
Information about configuring DataStax Enterprise, such as recommended production setting, configuration files, snitch configuration, start-up parameters, heap dump settings, using virtual nodes, and more.
DSE advanced functionality
Information on using DSE Analytics, DSE Search, DSE Graph, DSEFS (DataStax Enterprise file system), and DSE Advanced Replication.
- DSE Analytics
  DataStax Enterprise 6.0 Analytics includes integration with Apache Spark.
- DSE Search
  DSE Search allows you to quickly find data and provide a modern search experience for your users, helping you create features like product catalogs, document repositories, ad-hoc reporting engines, and more.
- DSE Graph
  Documentation for developers and administrators on installing, configuring, and using the features and capabilities of DSE Graph.
  - About DataStax Enterprise Graph
    Documentation for developers and administrators on installing, configuring, and using the features and capabilities of DSE Graph.
  - DSE Graph Terminology
    Explain terminology specific to DSE Graph.
  - DSE Graph QuickStart
    DSE Graph QuickStart using DataStax Studio or Gremlin console.
  - DSE Graph, OLTP, and OLAP
    OLTP and OLAP are different processing methods that DSE Graph uses to search graph databases.
  - Graph anti-patterns
    Examine common mistakes made with DSE Graph.
  - DSE Graph data modeling
    Introduce graph data modeling.
  - Using DSE Graph
    Create graph schema, load external data files, and do advanced graph traversals.
  - DSE Graph Analysis with DSE Analytics
    Perform analytics jobs on graph data using DSE.
  - DSE Graph Tools
    Introduce tools available for DSE Graph.
  - Starting the Gremlin console
    Starting the Gremlin console for an interactive environment.
  - DSE Graph Reference
    Reference commands and other information for DSE Graph.
    - The graph API
      Reference guide to graph commands.
    - The schema API
      Reference guide to schema commands.
    - The system API
      Reference guide to system commands.
    - The traversal API
      Reference commands and other information for Apache TinkerPop's Gremlin as used by DSE Graph.
      - Apache TinkerPop™ graph computing framework
        Describe the Apache TinkerPop framework.
      - General steps, step-modulators, and predicates
        TinkerPop general steps, step-modulators, and predicates
      - Predicates
        Predicates are used to determine relationships between data within traversals.
      - Step-modulators
        Helpers for Gremlin steps in traversals.
      - Vertex Steps
        Fundamental steps of Gremlin language
        out
        Move to the outgoing adjacent vertices, given the edge labels.
        in
        Move to the incoming adjacent vertices, given the edge labels.
        both
        Move to both the outgoing and the incoming adjacent vertices, given the edge labels.
        outE
        Move to the outgoing incident edges, given the edge labels.
        inE
        Move to the incoming incident edges, given the edge labels.
        bothE
        Move to both the outgoing and the incoming incident edges, given the edge labels.
        outV
        Move to the outgoing vertex.
        inV
        Move to the incoming vertex.
        bothV
        Move to both the outgoing and the incoming vertex.
        otherV
        Move to the vertex that was not the vertex that was moved from.
      - addV
        Specify a vertex from a traversal.
      - addE
        Specify an edge from a traversal.
      - property
        How to specify a property from a traversal.
      - mid-traversal V()
        Fetch a vertex in the middle of a graph traversal.
      - aggregate
        Aggregate all objects into a collection at a particular point in a graph traversal.
      - and
        Filter traversals using the AND boolean.
      - barrier
        Causes all steps prior to the barrier step to be executed before moving onto additional steps.
      - branch
        Split a traversal based on values.
      - cap
      - choose
        Route a traverser to a particular traversal branch option.
      - coalesce
        Return a value based on the first traversal that has an element.
      - coin
        Get a random coin toss value with stated odds.
      - constant
        Set a constant value.
      - count
        Get a count of the traverser that precedes the count step.
      - cyclicPath
        Filter out repeated steps in a traversal
      - dedup
        Deduplicate returned objects from a query.
      - drop
        Drop a traversal object.
      - explain
        Explain the traversal strategies used in a traversal.
      - fill
        Put all results in the provided collection, then return the collection.
      - filter
        Filter the traversal to eliminate some of the returned objects based on a criteria.
      - flatMap
        Create a map of traversal objects and stream to the next traversal step.
      - fold
        Aggregate all the returned objects into a list, then emit the list.
      - group
        Organize returned objects by a function of the objects.
      - groupCount
        Determines the number of objects specified.
      - has
        Filter based on a particular vertex or edge label, property key, or property value.
      - hasId
        Filter based on a particular id.
      - hasKey
        Filter based on a particular property key.
      - hasLabel
        Filter based on a particular vertex or edge label.
      - hasNext
        Determine if results are available from a traversal.
      - hasNot
        Filter based on a particular label or value not present.
      - hasValue
        Filter based on a particular property value.
      - id
        Fetch the id of a graph object.
      - inject
        Inject an object arbitrarily into a traversal stream.
      - is
        Filter for scalar values.
      - key
        Extracts property keys for specified object.
      - label
        Extracts the specified labels.
      - limit
        Limit the objects returned.
      - local
        Limit the operation of the traversal to a single element within the traversal.
      - loops
        Get the number of times a query has gone through a particular loop.
      - map
        Map a portion of the query.
      - match
        Provides a more declarative form of graph querying based on pattern matching.
      - math
        Enables scientific calculator functionality.
      - max
        Get the largest number in a traversal.
      - mean
        Get the mean average in a traversal.
      - min
        Get the smallest number in a traversal.
      - next
        Find the next results.
      - not
        Exclude a specified object from the traversal.
      - optional
        Returns an optional result if the specified traversal yields a result; otherwise, returns the calling element.
      - or
        Yield at least one result from choices.
      - order
        Sorts objects given a certain criteria.
      - pageRank
        Calculates pageRank.
      - path
        Examine the history of a traversal's path.
      - peerPressure
        Executes a Peer Pressure community detection algorithm over the graph.
      - profile
        Profile a traversal to determine statistical information.
      - project
      - properties
        Retrieve properties of a specified element.
      - propertyMap
        Yields a map representation of the properties of an element.
      - range
        Filter only a specified number of objects into the next step.
      - repeat
        Loop until a condition is met.
      - sack
        Read and write sacks.
      - sample
        Sample previous steps in the traversal.
      - select
        Select labeled steps.
      - sideEffect
        Perform some operation on the traverser and pass the result to the next step.
      - simplePath
        Use to prevent a traverser from repeating a path through the graph.
      - skip
        Skip a specified number of return objects.
      - store
        Store information for later use in the traversal.
      - subGraph
        Get a subgraph of the full graph.
      - sum
        Sum the previously returned objects.
      - tail
        Get the last specified number of returned objects.
      - timeLimit
        Limit the traversal to a specified number of milliseconds of execution time.
      - toBulkSet
        Return all restuls in a weighted set.
      - toList
        Return all results in a list.
      - toSet
        Return all results in a set with duplicated removed.
      - tree
        Create a tree of the traversal.
      - unfold
        Unfold a returned object into a linear form.
      - union
        Merge the results of several traversals.
      - value
        Get the value of a property given a specified property.
      - valueMap
        Yields a map representation of the properties of an element.
      - values
        Extract the value of properties for an element.
      - where
        Filters based on a predicate, a sideEffect or a traversal.
    - DSE Graph data types
      Describes the DSE Graph data types.
    - Graph storage in the DSE database keyspace and tables
      Describes graph storage in the DSE database at a high level.
- DSE Advanced Replication
  Documentation for configuring and using configurable distributed data replication.
Tools
Tools include dse commands, dsetool, fs-stress tool, pre-flight check, and yaml_diff tools, and the sstableloader.
Operations
DataStax Enterprise operation topics, such as node and datacenter operations, changing replication strategies, configuring compaction and compression, caching, and tuning Bloom filters.
CQL
CQL (Cassandra Query Language) is a query language for the DataStax Enterprise database.

TinkerPop Vertex Steps

Fundamental steps of Gremlin language

All the vertex steps are flatMap steps.

out
Move to the outgoing adjacent vertices, given the edge labels.
in
Move to the incoming adjacent vertices, given the edge labels.
both
Move to both the outgoing and the incoming adjacent vertices, given the edge labels.
outE
Move to the outgoing incident edges, given the edge labels.
inE
Move to the incoming incident edges, given the edge labels.
bothE
Move to both the outgoing and the incoming incident edges, given the edge labels.
outV
Move to the outgoing vertex.
inV
Move to the incoming vertex.
bothV
Move to both the outgoing and the incoming vertex.
otherV
Move to the vertex that was not the vertex that was moved from.

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Build time: 2023-03-29 08:48:14.106

DataStax, Titan, and TitanDB are registered trademarks of DataStax, Inc. and its subsidiaries in the United States and/or other countries.

Apache, Apache Cassandra, Cassandra, Apache Tomcat, Tomcat, Apache Lucene, Apache Solr, Apache Hadoop, Hadoop, Apache Pulsar, Pulsar, Apache Spark, Spark, Apache TinkerPop, TinkerPop, Apache Kafka and Kafka are either registered trademarks or trademarks of the Apache Software Foundation or its subsidiaries in Canada, the United States and/or other countries.

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