Step 5: Enable New Features
After upgrading MapR Core without the MapR Installer (using a manual offline or rolling upgrade method), enable the new features.
This task is applicable to all manual upgrade methods: offline, 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.
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.
maprcli cluster feature enable -all.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 |
|---|---|---|---|
| Name container threshold | mfs.feature.name.container.size.control | As of 6.0.1 | Enables support for setting a limit on the size of data stored in the name container for a volume. |
| External IPs for CLDB | cldb.feature.external.ip | As of 6.0 | Enables support for external IP addresses and port forwarding. Set the environment variables (as described here) before enabling this feature. After enabling this feature, perform a CLDB failover to allow MapR-FS to re-register. |
| Enforce guaranteed minimum replication | mfs.feature.enforce.min.replication | As of 6.0 | Enables support for enforcing minimum number of replicas for (read-write)
volumes during write operations. NOTE: Do not enable this feature
before upgrading all the nodes in the cluster. If you enable this feature before
upgrading all the nodes, MapR-FS will shut down on
the nodes that have not yet been upgraded. |
| CLDB snapshot improvements | mfs.feature.snapshotdb.lite | As of 6.0 | This feature stays disabled even after you enable it, till you perform a CLDB failover. This feature is enabled only after the CLDB failover is complete, after which you can experience significant performance improvements for snapshot create and delete operations. |
| Directcopy for Autosetup Replication, Change Data Capture and Secondary Index features. | mfs.feature.db.streams.v6.support | As of 6.0 | Enables the following:
|
| 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-ES 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. 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. This feature is enabled after security features are enabled on your cluster. WARNING: Clusters with active security features experience job failures
until this configuration value is set.
|