Difference between revisions of "Hardware resources"

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(Head node)
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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
  

Revision as of 11:58, 11 April 2018

Head node

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

Compute servers

  • There are 8 x 28-core compute nodes with 128 GB RAM each (wonko1 - wonko8)
  • There is a 96-core SMP server with 3 TB of RAM (alf)

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)
  • User scratch directories are on a 1.2 PB Lustre filesystem over Infiniband (/nlustre/scratch/users)

Backups

  • Home directories (/home) are backup up daily with a 14-day retention period for file versions.
    • You can thus possibly ask the system administrator to restore a copy that existed in the previous 14 days.
  • Lustre data directories (/lustre/users) are replicated every evening. Multiple versions of files are not retained.
    • 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.
    • 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.
  • Please contact the system administrator (johann.swart at up.ac.za) if restores are needed.