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--- partitions [2020/02/20 11:53]
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+++ partitions [2021/08/18 09:59] (current)
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@@ Line 3: / Line 3: @@
 **Partition** == **Queue**
-SLURM allows the definition of different partitions. Think of these as job queues.
+SLURM allows the definition of different partitions. A partition is a subset of all the nodes in the cluster. Partitions are not mutually exclusive, so a node can belong to multiple partitions. Every compute node is assigned to one or more partitions.
 Our cluster has 4 different partitions:
   * **standard**
-    * The default queue. Contains the 25 standard compute nodes (128GB RAM, at least 16 cores). No time limit.
+    * The default queue. Contains the 31 standard compute nodes (at least 128GB RAM, at least 16 cores). No time limit.
   * **gpu**
     * Contains the GPU machines only. No time limit. node91 has two (old) Nvidia K20m GPUs. node94 has an Nvidia V100 with 32GB of RAM.
   * **bigmem**
-    * Contains the big memory machines only (512GB or 768GB, 32 cores). No time limit.
+    * Contains big memory machines only (512GB or 768GB, 32 cores). No time limit.
   * **short**
-    * Contains all nodes, including gpu and bigmem, but has a 3 hour time limit, and jobs in this queue have a lower priority than jobs in the other queues.
+    * Contains all nodes, including gpu and bigmem, but has a 5 hour time limit, and jobs in this queue have a lower priority than jobs in the other queues. The short queue allows users with quick-running jobs to make use of all the cluster nodes without holding up users who need the special purpose (bigmem or gpu) nodes too much.
 **Standard**, **gpu**, and **bigmem** have no time limit.
-(There is actually a **long** partition defined, but it is no different from the **standard** partition.)

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