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pub:hpc:hellbender [2025/01/31 18:50] – [Tutorial: Globus File Manager] nal8cfpub:hpc:hellbender [2025/03/06 20:00] (current) – robertschrist
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 **What is the Difference between High Performance and General Performance Storage?** **What is the Difference between High Performance and General Performance Storage?**
  
-On Pixstor, which is used for standard HPC allocations, general storage is pinned to the SAS disk pool while high performance allocations are pinned to all flash NVME pool.  Meaning writes and recent reads will have lower latency with HPC allocations.+On Pixstor, which is used for standard HPC allocations, general storage is pinned to the SAS disk pool while high performance allocations are pinned to all flash NVME pool.  Meaning writes and recent reads will have lower latency with High performance allocations.
    
 On VAST, which is used for non HPC and mixed HPC / SMB workloads, the disks are all flash but general storage allocations have a QOS policy attached that limits IOPS to prevent the share from the possibility of saturating the disk pool to the point where high-performance allocations are impacted.  High Performance allocations may also have a QOS policy that allows for much higher IO and IOPS.  RSS reserves the right to move general store allocations to lower tier storage in the future if facing capacity constraints. On VAST, which is used for non HPC and mixed HPC / SMB workloads, the disks are all flash but general storage allocations have a QOS policy attached that limits IOPS to prevent the share from the possibility of saturating the disk pool to the point where high-performance allocations are impacted.  High Performance allocations may also have a QOS policy that allows for much higher IO and IOPS.  RSS reserves the right to move general store allocations to lower tier storage in the future if facing capacity constraints.
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   * Workloads that require sustained use of low latency read and write IO with multiple GB/s, generally generated from jobs utilizing multiple NFS mounts   * Workloads that require sustained use of low latency read and write IO with multiple GB/s, generally generated from jobs utilizing multiple NFS mounts
  
 +
 +**Snapshots**
 +
 +  *VAST default policy retains 7 daily and 4 weekly snapshots for each share
 +  *Pixstor default policy is 10 daily snapshots
  
 **__None of the cluster attached storage available to users is backed up in any way by us__**, this means that if you delete something and don't have a copy somewhere else, it is gone. Please note the data stored on cluster attached storage is limited to Data Class 1 and 2 as defined by [[https://www.umsystem.edu/ums/is/infosec/classification-definitions| UM System DCL]]. If you have need to store things in DCL3 or DCL4 please contact us so we may find a solution for you. **__None of the cluster attached storage available to users is backed up in any way by us__**, this means that if you delete something and don't have a copy somewhere else, it is gone. Please note the data stored on cluster attached storage is limited to Data Class 1 and 2 as defined by [[https://www.umsystem.edu/ums/is/infosec/classification-definitions| UM System DCL]]. If you have need to store things in DCL3 or DCL4 please contact us so we may find a solution for you.
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   * **[[https://status.missouri.edu| UM System Status Page]]**   * **[[https://status.missouri.edu| UM System Status Page]]**
-  * **[[https://po.missouri.edu/scripts/wa.exe?SUBED1=RSSHPC-L&A=1| RSS Announcement List: Please Sign Up]]**+  * **[[https://LISTS.UMSYSTEM.EDU/scripts/wa-UMS.exe?SUBED1=RSSHPC-L&A=1&SUB=1| RSS Announcement List: Please Sign Up]]**
   * **[[https://missouri.qualtrics.com/jfe/form/SV_6zkkwGYn0MGvMyO|RSS Services: Order Form]]**   * **[[https://missouri.qualtrics.com/jfe/form/SV_6zkkwGYn0MGvMyO|RSS Services: Order Form]]**
   * **[[https://request.itrss.umsystem.edu/|Hellbender: Account Request Form]]**   * **[[https://request.itrss.umsystem.edu/|Hellbender: Account Request Form]]**
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 ==== Open OnDemand ==== ==== Open OnDemand ====
  
-  * https://ondemand.rnet.missouri.edu - Hellbender Open OnDemand (HB OOD) +  * https://ondemand.rnet.missouri.edu - Hellbender Open OnDemand (Researcher) 
-  * https://hb-classes.missouri.edu - Hellbender Classes Open OnDemand (HB OOD classes)+  * https://hb-classes.missouri.edu - Hellbender Classes Open OnDemand (Classes)
  
 OnDemand provides an integrated, single access point for all of your HPC resources. The following apps are currently available on Hellbender's Open Ondemand. OnDemand provides an integrated, single access point for all of your HPC resources. The following apps are currently available on Hellbender's Open Ondemand.

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