What is Cloudera Manager and Cloudera Management Service

Big data is buzzing across all industries, and processing massive data is a big deal to extract trends and other meaningful information. Hadoop plays a more significant role in processing such massive data with commodity hardware.

Hadoop is a distributed data processing system, and we need more independent hardware to process data from gigabytes to petabytes.

So, installing and managing such distributed applications requiring several automated scripts and resources to get them to work.

Cloudera Manager makes this simple in managing distributed parallel processing Hadoop services as a cluster. Let us see what exactly is Cloudera manager and Cloudera Management Services and the importance of Cloudera Manager.

Cloudera Manager and its services

There are distributions available to manage the Hadoop stack, but Cloudera is the first one who released the commercial Hadoop distribution, and it has been widely used. It offers two major services: installation, configuration, monitoring, and management of the whole Hadoop stack.

1. Cloudera Manager (Cloudera Manager Server)
2. Cloudera Management Services

Cloudera Manager

Cloudera Manager is the agent-based application that controls the whole Hadoop cluster end to end. Agents are responsible for starting, stopping, configuring, and unpacking individual hosts in the cluster through a web-based UI administrator.

Cloudera Manager does the following management services:

• State Management
• Configuration Management
• Process Management
• Software Distribution Management
• Host Management
• Resource Management
• User Management
• Security Management

Cloudera Management Services

Cloudera Management Services collects various information from the agents installed in the host of the Hadoop cluster; agents collect host and service state information.

Based on the role, Cloudera offers the following services:

• Activity Monitor – Collects information about activities run by the MapReduce service.
• Host Monitor – Collects health and metric information about hosts.
• Service Monitor – Collects health and metric information about services and activity information from the YARN and Impala services.
• Event Server – Aggregates relevant Hadoop events and makes them available for alerting and searching.
• Alert Publisher – Generates and delivers alerts for certain types of events.

The above services are responsible for creating a state chart of the individual services running the cluster.

Importance of Cloudera Manager

The organization manages the Hadoop cluster with hundreds of nodes and scaling the cluster on both horizontal and vertical bases on the data growth rate.

Scaling and monitoring will be tedious and consumes more human resource and time to deep dive the log files in the absence of Cloudera manager and its services.

Cloudera Manager relies on any RDBMS where the cluster-related metadata is stored in a relational database to manage the Hadoop services.

As we said earlier, the Cloudera manager controls the clusters end to end, ensuring its high availability. So, it’s crucial to preserve the Cloudera manager’s database to ensure the uninterrupted monitoring of the Hadoop cluster.