Preparing each Node
Identifies major factors in preparing each node in your cluster.
Each node contributes to the cluster, so each must be able to run MapR and Hadoop software. Nodes must meet minimum requirements for operating system, memory and disk resources and installed software, such as Java. Including unsuitable nodes in a cluster is a major source of installation difficulty.
|OS||RedHat, Oracle Linux, CentOS, SUSE, or Ubuntu|
|Memory||8 GB minimum, more in production|
|Disk||Raw, unformatted drives and partitions|
|DNS||Hostname, reaches all other nodes|
|Users||Common users across all nodes; passwordless ssh (optional)|
|Java||Must run Java|
|Other||NTP, Syslog, PAM|
Use the subsequent sections as a checklist to make each candidate node suitable for its assigned roles. Once each node has been prepared or disqualified, install MapR software.