Step 4: Enable New Features

After upgrading MapR Core without the MapR Installer (using a manual offline, scripted, or rolling upgrade method ), enable the new features.

Note: This task is applicable to all manual upgrade methods: offline, scripted rolling, and manual rolling upgrades.

After a successful manual upgrade, administrators have the option to enable new features that are not enabled by default.

Based on the version that you upgraded from, the following features can be enabled. Once your features are enabled, run simple and non-trivial health checks to verify cluster health. These features are automatically enabled with a fresh install.

Important: All nodes in your cluster must be upgraded before enabling new features.

Enable Feature Command

Features are enabled using the maprcli cluster feature enable command. A list of the features are obtained using the maprcli cluster feature list command. See maprcli cluster commands for more information.

Attention: It is strongly recommended that all of the features be enabled: maprcli cluster feature enable -all.
Note: The maprcli config save command is no longer available for enabling features.

Once your features are enabled, run simple and non-trivial health checks to verify cluster health. These features are automatically enabled with a fresh install.

Feature Summary

Feature Feature Name Version Available Description
Container identity reuse cldb.feature.cid.reuse As of 5.2.1 Support for container identity reuse.
Streams connect support mfs.feature.streams.connect.support As of 5.2.1 Enables support for Kafka Connect in the distributed mode.
Fast inode scan for mirroring mfs.feature.fastinodescan.support As of 5.2.1 Enables fast mirroring when there are large numbers of files with few changes.
Hardlinks mfs.feature.hardlinks.support As of 5.2 Enables support for retrieving hard links on files.
Extended Attributes mfs.feature.fileace.support As of 5.2 Enables support for adding, retrieving, and removing extended attributes on files and directories.
MapR Streams and MapR-DB as a document database mfs.feature.db.json.support As of 5.1 Enables the use of MapR Streams and MapR-DB as a Document Database.
Access Control Expressions for MapR-FS mfs.feature.fileace.support As of 5.1 Enables the setting of Access Control Expressions on filesystem and whole volume data.
MapR Auditing mfs.feature.audit.support As of 5.0 Logs audit records of cluster-administration operations and operations on directories, files, and tables.
MapR Volume Upgrade mfs.feature.volume.upgrade, mfs.feature.rwmirror.support As of 5.0 Enables support for promotable mirrors on both old-format and new-format volumes.
MapR-DB Table Replication mfs.feature.db.repl.support As of 4.1 Enables support for MapR-DB table replication.
Promotable Mirror Volumes mfs.feature.rwmirror.support As of 4.0.2 Enables support for promotable mirror volumes.
Reduce On-Disk Container Size cldb.reduce.container.size As of 4.0.2 Reduces the space required on-disk for each container. The reduction of the on-disk container size takes effect after the CLDB service restarts or fails over.
Note: After enabling this feature on a cluster with more than a million containers, it may take some time for the initial failover to complete because the CLDB will re-write container location tables and storage pool container map tables. However, this delay will not reoccur with any subsequent failovers.
Bulk loading of Data to MapR-DB Tables mfs.feature.db.bulkload.support As of 3.1.1 Enables support for bulk loading of data to MapR-DB tables. Used when upgrade from MapR version 3.1 or earlier.
Access Control Expressions and Table Region Merges mfs.feature.db.ace.support, mfs.feature.db.regionmerge.support, mfs.feature.filecipherbit.support As of 3.1

The following features enable support for Managing Access Control Expressions (ACEs) and table region merge. Used when upgrading from MapR version 3.0.x.

mfs.feature.db.ace.support
mfs.feature.db.regionmerge.support

These features are automatically enabled with a fresh install or when you upgrade from a version earlier than 3.0.x.

Important: After enabling ACEs for MapR tables, table access is enforced by table ACEs instead of the file system. As a result, all newly created tables are owned by root and have their mode bits set to 777.

The following feature enables encryption of network traffic to or from a file, directory, or MapR-DB table with the following feature. This feature is enabled after security features are enabled on your cluster.

mfs.feature.filecipherbit.support
Warning: Clusters with active security features will experience job failure until this configuration value is set.