Core Upgrade Process

When you upgrade core, you will also upgrade a number of cluster components.

The following cluster components are upgraded with core:

  • Storage Layer: File system, fileserver, and Container Location Database (CLDB) services
  • Cluster Management Services: ZooKeeper and Warden
  • NFS server
  • Web server, including the Control System user interface and REST API to cluster services
  • The maprcli commands for managing cluster services
  • Any new features and performance enhancements introduced with the new version.

When you upgrade core, the following changes occur within the /opt/mapr directory:

  • If required, additional folders are added.
  • Product binaries are replaced by binaries associated with the new version.
  • Existing configuration files remain in the active directory, and default configuration files associated with the new version are installed in a new directory:
    Default Configuration File Directories Active Configuration File Directories

    /opt/mapr/conf.new

    		/opt/mapr/conf
    /opt/mapr/conf/conf.d.new /opt/mapr/conf/conf.d