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:description: Apache Hop is an independent platform that originated from the same code base as Kettle (Pentaho Data Integration). This page provides an overview of the differences in concepts, configuration, engines and features between Hop and Kettle/PDI
[[HopvsKettle]]
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= Hop vs Kettle - A Quick Comparison


== Concepts

[width=90%",cols="6,2,2",options="header"]
|===
|Terminology|Kettle|Hop
|Parallel scalable data pipeline|Transformation|Pipeline
|An operation in a parallel pipeline|Step|Transform
|Sequential series of actions|Job|Workflow
|An action in a workflow|Job Entry|Action
| Shared metadata container|Metastore|Hop Metadata
|The graphical user interface|Spoon|Hop Gui
|Script to run data pipelines|Pan|Hop Run
|Script to run workflows|Kitchen|Hop Run
|Server for remote execution|Carte|Hop Server
|Script for configuration|-|Hop Config
|===

== Configuration

[cols="2,3,3",options="header"]
|===
|Configuration|Kettle|Hop
|System variables|{openvar}KETTLE_HOME{closevar}/.kettle/kettle.properties|{openvar}HOP_CONFIG_FOLDER{closevar}/hop-config.json or ./config/hop-config.json
|GUI preferences (fonts, colors, preferences…)|{openvar}KETTLE_HOME{closevar}/.kettle/kettle.properties|{openvar}HOP_CONFIG_FOLDER{closevar}/hop-config.json or ./config/hop-config.json
|Language choice|{openvar}KETTLE_HOME{closevar}/.kettle/.languageChoice|{openvar}HOP_CONFIG_FOLDER{closevar}/hop-config.json or ./config/hop-config.json
|Shared objects|{openvar}KETTLE_HOME{closevar}/.kettle/shared.xml|All stored in Hop shared metadata
|GUI usage information|{openvar}KETTLE_HOME{closevar}/.kettle/kettle.properties|{openvar}HOP_AUDIT_FOLDER{closevar}/<project>/
|Shared metadata|{openvar}PENTAHO_METASTORE_FOLDER{closevar} or {openvar}HOME{closevar}/.pentaho/metastore|{openvar}HOP_METADATA_FOLDER{closevar} or {openvar}HOP_CONFIG_FOLDER{closevar}/metadata
|Environment/Project configurations|{openvar}KETTLE_HOME{closevar}/.kettle/environment/metastore|{openvar}HOP_CONFIG_FOLDER{closevar}/hop-config.json or ./config/hop-config.json
|===

== Engines

[cols="70%,15%,15%",options="header"]
|===
|Engine|Kettle|Hop
|Unit Testing|Plugin|Yes
|Apache Spark Support|No (PDI EE only)|Yes (Beam)
|Apache Flink Support|No|Yes (Beam)
|Google Cloud DataFlow Support|No|Yes (Beam)
|===

== Features

[cols="70%,15%,15%",options="header"]
|===
|Feature|Kettle|Hop
|Projects and Lifecycle Configuration |No|Yes
|Search Information in projects and configurations|No|Yes
|Configuration management through UI and command line|No|Yes
|Standardized shared metadata|No|Yes
|Pluggable runtime engines|No|Yes
|Advanced GUI features: memory, native zooom, ...|No|Yes
|Metadata Injection|Yes|Yes (most transforms)
|Mapping (sub-transformation/pipeline|Yes|Yes(simplified)
|Web Interface|WebSpoon|HopWeb
|APL 2.0 license compliance|LGPL doubts regarding pentaho-metastore library|Yes
|Pluggable metadata objects|No|Yes
|GUI plugin architecture|XUL based (XML)|Java annotations
|===