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technical:slurm:node-memory-sizes [2019-02-18 12:10] – frey | technical:slurm:node-memory-sizes [2019-02-18 12:25] – [Nominal node memory size is not an appropriate limit] frey | ||
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The changes did not need to be rolled-back, | The changes did not need to be rolled-back, | ||
- | One additional problem could present itself under the v1.1.3 use of nominal physical memory size for the nodes Consider the following: | + | One additional problem could present itself under the v1.1.3 use of nominal physical memory size for the nodes. |
* A node runs a job requesting 28 cores and 100 GiB of memory, leaving 8 cores and 28 GiB of memory available according to the node configuration. | * A node runs a job requesting 28 cores and 100 GiB of memory, leaving 8 cores and 28 GiB of memory available according to the node configuration. | ||
- | * A second job from a different user, requesting | + | * The same node runs a second job that requests |
- | Since the OS itself occupies some non-trivial amount of the physical memory, the second job eventually extends memory usage above and beyond the amount of physical memory present. | + | Since the OS itself occupies some non-trivial amount of the physical memory, the second job eventually extends memory usage above and beyond the amount of physical memory present |
<WRAP negative round> | <WRAP negative round> | ||
Line 77: | Line 77: | ||
^Node type^(PHYS_PAGES*PAGESIZE)/ | ^Node type^(PHYS_PAGES*PAGESIZE)/ | ||
- | |Gen1/128 GiB|128813|126976|124 | + | |Gen1/128 GiB|128813|126976|124| |
- | |Gen1/256 GiB|257843|256000|250 | + | |Gen1/256 GiB|257843|256000|250| |
- | |Gen1/512 GiB|515891|514048|502 | + | |Gen1/512 GiB|515891|514048|502| |
- | |Gen1/ | + | |Gen1/ |
- | |Gen1/ | + | |Gen1/ |
- | |Gen1/ | + | |Gen1/ |
- | |Gen1/ | + | |Gen1/ |
+ | A workgroup QOS which under v1.1.3 had '' | ||
===== Implementation ===== | ===== Implementation ===== | ||