Home
6.0 Development
This section contains information related to application development for ecosystem components and MapR products including MapR-DB (binary and JSON), MapR-FS, and MapR Streams.
Ecosystem Components
The following sections provide information about each open source project that MapR supports.
AsyncHBase
AsyncHBase Behavior with MapR-DB Binary Tables
After you install AsyncHBase, you can use the AsyncHBase libraries to provide asynchronous access to MapR-DB binary tables. However, it is important to note the behavior that is specific to using AsyncHBase with MapR-DB.

MapR 6.0 Documentation

6.0 Development
This section contains information related to application development for ecosystem components and MapR products including MapR-DB (binary and JSON), MapR-FS, and MapR Streams.
- Application Development Process
  Before you start developing applications on MapR’s Converged Data Platform, consider how you will get the data onto the platform, the format it will be stored in, the type of processing or modeling that is required, and how the data will be accessed.
- MapR-FS and Apps
  The following sections provide information about accessing MapR-FS with C and Java applications.
- MapR-DB and Apps
  This section contains information about developing client applications for JSON and binary tables.
- MapR-ES and Apps
  MapR-ES brings integrated publish and subscribe messaging to the MapR Converged Data Platform.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- MapR Data Science Refinery
  The MapR Data Science Refinery is an easy-to-deploy and scalable data science toolkit with native access to all platform assets and superior out-of-the-box security.
- MapR Data Fabric for Kubernetes FlexVolume Driver
  This section describes how to use and troubleshoot the MapR Data Fabric for Kubernetes FlexVolume Driver.
- Ecosystem Components
  The following sections provide information about each open source project that MapR supports.
  - MapR Ecosystem Packs
    A MapR Ecosystem Pack (MEP) provides a set of ecosystem components that work together on one or more MapR cluster versions. Only one version of each ecosystem component is available in each MEP. For example, only one version of Hive and one version of Spark is supported in a MEP.
  - AsyncHBase
    - Compiling and Running AsyncHBase Applications
      When you compile or run AsyncHBase applications, you need to include the required AsyncHBase libraries.
    - AsyncHBase Script
      MapR provides an AsyncHBase script that you can use to run applications and generate the AsyncHBase classpath.
    - AsyncHBase Behavior with MapR-DB Binary Tables
      After you install AsyncHBase, you can use the AsyncHBase libraries to provide asynchronous access to MapR-DB binary tables. However, it is important to note the behavior that is specific to using AsyncHBase with MapR-DB.
    - Using OpenTSDB with AsyncHBase
      OpenTSDB can use MapR’s AsyncHBase to perform time-series data-plots on MapR-DB binary tables.
    - GetRequest API
      MapR includes an additional constructor for the GetRequest class which takes an extra qualifier.
  - Cascading
  - Drill
  - Flume
  - HBase Client and MapR-DB Binary Tables
  - HCatalog
  - Hive
  - HttpFS
  - Hue
  - Impala
  - MapR-ES Clients and Tools
  - Myriad
  - OpenStack Manila
  - Oozie
  - Pig
  - Sentry
  - Spark
  - Sqoop
  - Third Party Solutions
- Maven and MapR
  This section discusses topics associated with Maven and MapR.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  MapR supports public APIs for MapR-FS, MapR-DB, and MapR-ES. These APIs are available for application development purposes.

AsyncHBase Behavior with MapR-DB Binary Tables

After you install AsyncHBase, you can use the AsyncHBase libraries to provide asynchronous access to MapR-DB binary tables. However, it is important to note the behavior that is specific to using AsyncHBase with MapR-DB.

The Scanner.setMaxNumKeyValues method, when run against MapR-DB binary tables, does not behave as documented.: According to the AsyncHBase documentation, this method sets “the maximum number of KeyValues the server is allowed to return in a single RPC response.”
When you use this method with MapR-DB binary tables, the value for the maximum number of key values is ignored and the full set of KeyValues is always returned.

List<RegionClientStats> regionStats() is not supported: As of AsyncHBase 1.7-1603, List<RegionClientStats> regionStats() is not supported and when it is used the API does not return statistics.

MapR-DB ignores HBase configurations in the asynchbase.conf file: As of AsyncHBase 1.7-1603, the conf object can be used to override Hbase properties that were previously only configured in the asynchbase.conf file. The asynchbase.conf file is located in the asynchbase installation directory. MapR-DB does not use these Hbase configurations and therefore they are ignored by MapR-DB