What's New in Version 6.1.1

New Repository for MapR Software

On August 1, 2023, Hewlett Packard Enterprise introduced a new download repository for MapR Data Platform core and ecosystem software packages. https://package.ezmeral.hpe.com/ is the new repository for MapR downloads. For all MapR releases, https://package.ezmeral.hpe.com/ replaces two older repositories:

Description	URL	Authentication Required?
New repository	https://package.ezmeral.hpe.com/	Yes
Old repositories	https://package.mapr.com/ https://package.mapr.hpe.com/	Yes¹

¹Beginning October 2023, the old repositories are redirected to the new repository URL, which requires authentication.

The new repository requires you to provide the email and token for your HPE Passport account. Software that points to the old repositories must be updated to include your HPE Passport email and token. For more information about using the new repository, see Using the HPE Ezmeral Token-Authenticated Internet Repository.

If you plan to use the MapR Installer, you must update the Installer to version 1.18.0.3 or later. Earlier versions of the Installer will not work with the new repository. See Updating the MapR Installer.

Filesystem Additions

CORE-517: Added the -no-auto-permission-update option to prevent MapR from silently altering the /etc/shadow file during reconfiguration.

MFS-2343: Enhanced the node list command. Using the node list command without the -clientsonly true or the -nfsnodes true option, does not list edge nodes. To include edge nodes, use the -nfsnodes true or the -clientsonly true option.

MFS-2344: Added a new CLDB parameter cldb.ignore.posix.only.hb.alarm that controls whether this alarm is raised for edge nodes.

MFS-2749: Added a parameter cldb.disable.alarm.history to disable alarm history.

MFS-11243: Added a FUSE tunable (fuse.max.cache.pages) to limit the amount of memory that each FUSE process can use when working with a large number of open files.

MFS-11674: Added a new -D|--crc option to enable gfsck to perform CRC checks without blocking the operations on the EC frontend volume.

MCS Additions

MON-5511: Added Snapshot Size as a configurable column in the Volumes List view.

Operating System Support

MapR version 6.1.1 supports SuSE Linux Enterprise Server version 12 SP5.

Performance

MAPRDB-2250: Added a parameter mfs.db.max.concurrent.internal.ops to regulate the number of parallel BatchGet operations.

MAPRMR-8: Added the parameter mapreduce.input.fileinputformat.split.maxblocknum that determines the number of blocks that can be added to one split.

MFS-2078: Added the fuse.negative.timeout parameter to cache negative lookup results, and speed up FUSE path lookups.

MFS-4750: Added a tunable - prevent.volume.skew.by.diskbalancer to let the Disk Balancer allow or prevent volume skew.

MFS-4805

Added the following entities in /opt/mapr/conf/nfsserver.conf:

MemDebugEnable - Set to true to enable Memory Debugging.
HighMemLimitMB - Sets the maximum amount of memory that the NFS Server can use.

Security

CORE-384: Added a parameter JMXDISABLE to enable or disable loading ZooKeeper JMX parameters.

MFS-3310: Added the Security Certificate Expiry Alarm.

MFS-5236: Added a new parameter warden.enable.jmxremote that must be explicitly set to true to enable the Warden JMX Server.

YARN

MAPRMR-19

Two options have been added to YARN to retry fetching job statuses.

yarn.app.mapreduce.job.update-status-max-retries - The number of times to retry.
yarn.app.mapreduce.job.update-status-retry-interval - The interval to wait before each retry attempt.

MAPRYARN-210: Added the Local Log Aggregation Feature.

MAPRYARN-221

Added two options:

yarn.nodemanager.timeout-localizing-container - The maximum time to wait to localize resources for containers.
yarn.nodemanager.check-interval-localizing-container.ms - The frequency at which the ApplicationMaster checks the running time of the localizing container.

MAPRYARN-250: Added a parameter, mapreduce.jobhistory.intermediate-done-scan-timeout to set the timeout in milliseconds for rescanning the done_intermediate user directory.

Other Features

For a list of other features, see What's New in Version 6.1.0