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Terra:Batch:Usable Memory

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Usable Memory for Batch Jobs

While nodes on Terra have either 64GB or 128GB of RAM, some of this memory is used to maintain the software and operating system of the node. In most cases, excessive memory requests will be automatically rejected by SLURM.

The table below contains information regarding the approximate limits of Terra memory hardware and our suggestions on its use.

Memory Limits of Nodes
64GB Nodes 128GB Nodes 96GB KNL Nodes (68 core) 96GB KNL Nodes (72 core)
Node Count 256 48 8 8
Number of Cores 28 Cores (2 sockets x 14 core) 68 Cores 72 Cores
Memory Limit
Per Core
2048 MB
2 GB
4096 MB
4 GB
1300 MB
1.25 GB
1236 MB
1.20 GB
Memory Limit
Per Node
57344 MB
56 GB
114688 MB
112 GB
89000 MB
84 GB
89000 MB
84 GB

SLURM may queue your job for an excessive time (or indefinitely) if waiting for some particular nodes with sufficient memory to become free.