HPE Ezmeral Data Fabric 6.1.x is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About MapR 6.1
This site contains the main documentation for Version 6.1 of the MapR Converged Data Platform, including installation, configuration, administration, and reference information.
6.1 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
6.1 MapR Data Platform
MapR Data Platform is the industry-leading data platform for AI and analytics that solves enterprise business needs.
6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and MapR Data Platform products, including the file system, Database (Key-Value and JSON), and Event Streams.
- Application Development Process
  Before you start developing applications on the MapR Data Platform platform, consider how you will get the data into the platform, the storage format of the data, the type of processing or modeling that is required, and how the data will be accessed.
- MapR XD and Apps
  The following sections provide information about accessing the MapR XD with C and Java applications.
- MapR Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- MapR Event Store For Apache Kafka and Apps
  MapR Event Store For Apache Kafka brings integrated publish and subscribe messaging to MapR Data Platform.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- MapR Data Science Refinery
  The MapR Data Science Refinery product 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
  This section describes how to leverage the capabilities of the MapR Data Fabric for Kubernetes.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the MapR Data Platform.
  - Ezmeral Ecosystem Packs
  - AsyncHBase
  - Cascading
  - Apache Drill
  - Flume
  - HBase
  - HBase Client and MapR Database Binary Tables
  - HCatalog
  - Hive
  - HttpFS
  - Hue
  - Impala
  - Livy
    Apache Livy is primarily used to provide integration between Hue and Spark.
  - MapR Event Store For Apache Kafka Clients and Tools
    Describes the supported MapR Event Store For Apache Kafka tools and clients.
  - S3 Gateway
    The S3 gateway is a service that provides an S3-compatible interface to expose data in MapR Data Platform as objects. The S3 gateway manages all inbound S3 API requests to put data into and get data out of cloud storage.
    - Configuring S3 Gateway
      Describes how to configure the S3 gateway.
    - Using the MapR Event Store For Apache Kafka for S3 Bucket Event Notifications
      You can use the MapR Event Store For Apache Kafka to receive event notifications for buckets. For example, when an object is created in a bucket. Install the event store, create a stream and topic, and then enable notifications in /opt/mapr/objectstore-client/objectstore-client-<version>/conf/config.json. You can then configure S3 event notifications through the S3 REST API, and use the AWS CLI to manage the notifications.
    - AWS CLI for S3 Gateway
      You can install and use the AWS Command Line Interface (CLI) with the S3 gateway.
    - Logs for the S3 Gateway
      Logs for the S3 Gateway are available after the first run. You can access logs in /opt/mapr/objectstore-client/objectstore-client-<version>/logs/.
    - Troubleshooting S3 Gateway
      This section shows some common error messages generated by the S3 gateway.
    - S3 Gateway Limitations
      The S3 Gateway has certain limitations and restrictions involving protocol support, object naming, and specific object and bucket APIs that are not supported.
  - Myriad
  - Oozie
  - Pig
  - Sentry
  - Apache Spark
  - Sqoop
  - YARN
  - Zeppelin
- 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 Data Platform supports public APIs for MapR File System, MapR Database, and MapR Event Store For Apache Kafka. These APIs are available for application-development purposes.
Other Docs
This section contains release-independent information, including: MapR Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other MapR version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

S3 Gateway Limitations

The S3 Gateway has certain limitations and restrictions involving protocol support, object naming, and specific object and bucket APIs that are not supported.

NOTICE The S3 gateway is included in EEP 6.0.0 - EEP 8.0.0 repositories.

Multiple protocol support limitation: You can write data via S3 API and read data via NFS/POSIX. But, you CANNOT write to NFS and read via the S3 API as NFS has no ability to populate the necessary S3 metadata required by S3 gateway.
S3 gateway instance limitation: You can use only one instance of S3 gateway on any given bucket.

Object name character restrictions

You cannot use object names that contain characters `^*|" are NOT supported in Windows and other file systems which do not support them.

S3 object APIs not supported

ObjectACL (Use bucket policies instead)
ObjectTorrent
ObjectVersions

S3 Bucket APIs not supported

BucketACL (Use bucket policies instead)
BucketCORS (CORS enabled by default on all buckets for all HTTP verbs)
BucketLifecycle (Not required for Minio erasure coded backend)
BucketReplication (Use mc mirror instead)
BucketVersions, BucketVersioning (Use s3git)
BucketWebsite (Use caddy or nginx)
BucketAnalytics, BucketMetrics, BucketLogging (Use bucket notification APIs)
BucketRequestPayment
BucketTagging

File deletion limitation

If you delete a file using S3 gateway, it will delete the metadata file but not the metadata directory of the file.