Difference between revisions of "New mek-quake"
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= New mek-quake = |
= New mek-quake = |
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| − | This is a large cluster system to be used by the Wales and Vendruscolo |
+ | This is a large cluster system to be used by the Wales and Vendruscolo groups. There are some decisions to be made about setting it up. |
| − | groups. There are some decisions to be made about setting it up. |
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| − | On clust (the other Wales group cluster) there are dual-CPU nodes but |
+ | On clust (the other Wales group cluster) there are dual-CPU nodes but these are deliberately hidden from the queueing system. The smallest unit |
| − | these are deliberately hidden from the queueing system. The smallest unit |
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you can get is a single node. This was to avoid the situation we get on |
you can get is a single node. This was to avoid the situation we get on |
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nimbus, a similar machine, where parallel jobs sometimes get assigned one |
nimbus, a similar machine, where parallel jobs sometimes get assigned one |
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task on certain nodes, instead of two. This seems to happen despite the |
task on certain nodes, instead of two. This seems to happen despite the |
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| − | queues being configured to ask for two tasks per node on parallel jobs but it is always possible for users to reset this so I |
+ | queues being configured to ask for two tasks per node on parallel jobs but it is always possible for users to reset this so I do not knpw |
Revision as of 15:50, 11 April 2006
New mek-quake
This is a large cluster system to be used by the Wales and Vendruscolo groups. There are some decisions to be made about setting it up.
On clust (the other Wales group cluster) there are dual-CPU nodes but these are deliberately hidden from the queueing system. The smallest unit you can get is a single node. This was to avoid the situation we get on nimbus, a similar machine, where parallel jobs sometimes get assigned one task on certain nodes, instead of two. This seems to happen despite the queues being configured to ask for two tasks per node on parallel jobs but it is always possible for users to reset this so I do not knpw