What's New in Cloudera Manager Free Edition 4.5.0
Cloudera Manager Free Edition 4.5.0 includes the following new features:
- Easy CDH upgrade. You can now manage and upgrade the CDH binaries on the cluster using Cloudera Manager, which supports a new packaging format called "parcel". Rather than manually upgrading the CDH packages across your cluster, you can now download, distribute and activate a new CDH version all from within Cloudera Manager. See Managing Parcels. Parcels are available for CDH 4.1.3 and onwards. Cloudera Manager continues to work with RPM (RHEL and SLES) and Debian/Ubuntu packages.
- Improved configuration management for role instances. You can now group an arbitrary set of roles instances (of the same type, for example, DataNodes) together and manage their configuration as a unit. Called "Role Groups", this feature simplifies configuring groups of roles that need to have different configuration settings, for example when running on nodes with heterogeneous hardware.
- Improved role to host assignment with Host Templates. A host template defines a set of role configurations that can be applied to new hosts. This simplifies the process of adding hosts and instantiating the roles that should run on those hosts.
- Resource management. Enables partitioning of cluster resources (CPU, memory) across different services in use. Enables customers to run multiple workloads/services simultaneously (for example, MapReduce and Impala on the same cluster) with no loss in QoS.
- AWS installation wizard. When running on AWS (Amazon Web Services), the Cloudera Manager installation wizard can create your entire cluster from scratch (including EC2 instance creation), and optimize settings for the AWS environment. This provides an excellent way to create a fully functional CDH cluster managed by Cloudera Manager, although it is not intended for long-running production use.
- Support for Hive. Cloudera Manager can automatically set up the Hive Metastore for you. It also supports running the Hive Metastore Server and HiveServer2. If you have configured Hue or Impala, then upgrading to Cloudera Manager 4.5 will automatically create new Hive service(s), migrate the existing Hive related configuration over, and link Hue and Impala to the new Hive service(s). Note that Cloudera Manager 4.5 supports Hive Server2 only with CDH4.2.
- Hue dependency on MapReduce. In CDH3 clusters, Hue had a dependency on the MapReduce service. Starting with Cloudera 4.5, Hue has a dependency on the Hive service, which indirectly satisfies the MapReduce dependency.
- Automatic creation of Oozie ShareLib. Oozie ShareLib is automatically installed when adding an Oozie service.
- Support for HBase REST and Thrift servers. These can be added as role instances for HBase services.
- HDFS Short-circuit reads improvement. In Cloudera Manager 4.1, HDFS short-circuit reads is enabled only for Impala daemons. In Cloudera Manager 4.5, HDFS will perform short-circuit reads if clients are so configured. By default, Impalad and HBase RegionServers enable short-circuit reads, while MapReduce TaskTrackers and all gateways (HDFS, MapReduce, HBase) disable short-circuit reads.
- General usability and user interface improvements.
- Support for unlimited nodes. Previous versions of Cloudera Manager Free Edition limited the number of managed nodes to 50. This limitation has been removed.