Managing Software Installation Using Cloudera Manager
A major function of Cloudera Manager is to install CDH and managed service software. Cloudera Manager installs software for new deployments and to upgrade existing deployments. Cloudera Manager supports two software distribution formats: packages and parcels.
A package is a binary distribution format that contains compiled code and meta-information such as a package description, version, and dependencies. Package management systems evaluate this meta-information to allow package searches, perform upgrades to a newer version, and ensure that all dependencies of a package are fulfilled. Cloudera Manager uses the native system package manager for each supported OS.
- Parcels are self-contained and installed in a versioned directory, so multiple versions of a parcel can be installed side-by-side. You can then designate one of the installed versions as the active one. With packages, only one package can be installed at a time, so the installed version is active.
- Parcels can be installed at any location in the filesystem (/opt/cloudera/parcels by default). Packages are always installed in /usr/lib.
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