Difference between revisions of "Hardware resources"

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=== Head node===
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=== Head node ===
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* The head node is wonko.bi.up.ac.za
 
* The head node is wonko.bi.up.ac.za
  
 
=== Compute servers===
 
=== Compute servers===
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* There are 8 x 28-core compute nodes with 128 GB RAM each (wonko1 - wonko8)
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* There are 10 x 28-core compute nodes with 128 GB RAM each (wonko1 - wonko10). These nodes constitute the short, normal and long queues.
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* There is a 96-core SMP server with 3 TB of RAM (alf)
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* There is a 96-core SMP server with 3 TB of RAM (alf). This large multicore server takes care of the bigmem queue on its own.
  
 
=== Storage ===
 
=== Storage ===
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* Home directories are on a 70 TB NFS4 filesystem over Infiniband (/home)
 
* Home directories are on a 70 TB NFS4 filesystem over Infiniband (/home)
 
* User data directories are on a 1.2 PB Lustre filesystem over Infiniband (/nlustre/users)
 
* User data directories are on a 1.2 PB Lustre filesystem over Infiniband (/nlustre/users)
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* User scratch directories are on a 1.2 PB Lustre filesystem over Infiniband (/nlustre/scratch/users)
 
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=== Backups ===
 
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* Home directories (/home) are backup up daily with a 14-day retention period for file versions.
 
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** You can thus possibly ask the system administrator to restore  a copy that existed in the previous 14 days.
 
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* Lustre data directories (/lustre/users) are replicated every evening. Multiple versions of files are not retained.
 
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** Deleted files are purged on Sundays. This means that if you accidentally delete a file, the system administrator may possibly be able to restore the file if you alert him before the first Sunday comes along.
 
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** If you overwrite a file, it will be replicated around 20:00 that day. If you alert the system administrator before then, he may possibly be able to restore the copy from the previous day.
 
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* Please contact the system administrator (johann.swart at up.ac.za) if restores are needed.
 

Latest revision as of 05:02, 20 May 2020

Head node

  • The head node is wonko.bi.up.ac.za

Compute servers

  • There are 10 x 28-core compute nodes with 128 GB RAM each (wonko1 - wonko10). These nodes constitute the short, normal and long queues.
  • There is a 96-core SMP server with 3 TB of RAM (alf). This large multicore server takes care of the bigmem queue on its own.

Storage

  • Please also see Storage Quotas and Charges
  • Home directories are on a 70 TB NFS4 filesystem over Infiniband (/home)
  • User data directories are on a 1.2 PB Lustre filesystem over Infiniband (/nlustre/users)
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