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The management servers play a critical role in handling non-compute services within a cluster, such as administration and user access. These servers typically function as either management nodes or login nodes, and their configuration and quantity depend on the cluster's size and requirements.
The baseline configurations for infrastructure nodes are based on the R6625 (AMD) and R660 (Intel) servers. Density is not a concern because infrastructure nodes are a small fraction of the overall cluster, and therefore regular 1U or 2U systems can be used. Typically, clusters have matching platform architectures for both infrastructure and compute servers for ease of administration. Login nodes specifically benefit from being of the same architecture as application nodes.