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description...

Notes on general usage concept (proposal  bySteffen Christgau (Unlicensed) ): Since no resource management system is currently installed, be gentle to other users, take care to not disturb experiments/measurements of others.

Systems

NEC SX-Aurora TSUBASA A300-8 (aurora)

...beschreibung...

hostname: aorora.xxxx


CPU2x Xeon Gold 6126 (12c, 2,6 GHz) Skylake
Memory

192 GB (DDR4-2666 ESS RDIMM)

Extension8x NEC Vector Engine 1.0 (1,4 GHz, 8c, 2,15TFLOP, 48G)







Intel Optane NVRAM (apass{1,2})

The Apache Pass Systems are equipped with Intel Optane Memory components, both as Storage Class Memory (SCM/NVRAM) and SSD. The main difference between the two hosts is the memory capacity.

The Apache Pass memory, i.e. each of the systems, can be configured in two (three) modes:

  • Memory Mode: The Apache Pass/Optane Memory is exposed as RAM to the OS. Although the hardware is different, this mode allows transparent usage of this memory type. The main benefits are the gained memory capacity and easy usage (no modification of applications required). The DRAM memory acts as cache for Optane Memory. In this mode, the SCM is effectively not persistent.
  • AppDirect Mode: The Apache Pass/Optane Memory is exposed as block device(s) to the OS (usually as /dev/pmemX, depending on actual configuration). On such block devices, a file system can be created which should support the direct access (DAX) option. This enables mapping data on the persistent Optane Memory into an application's virtual address space while avoiding the OS' page cache. Thus, direct media access with load/store operations is possible. Note that data on the Optane Memory is deleted when the mode is changed. Therefore, data on /dev/pmem should be considered as ephemeral.
  • (Mixed/Hybrid Mode: The System can also be configured to provide a portion of the Optane capacity for the Memory Mode and another portion for AppDirect mode.)

By default: apass1 is configured in Memory Mode while apass2 is configured in AppDirect Mode. (tbd) If you need a different configuration contact ...who....

As simple check for the given mode you can run free -h. If the total memory capacity is around or larger than 3 TB the system is in memory mode. Further, if /dev/pmem[01] exists, the AppDirect (or Mixed/Hybrid) mode is in effect.

hostname: apass{1,2}.xxxxx

Hardware

CPU

2x Intel Xeon Platinum 8260L (24c, 2,4 GHz) Cascade Lake SP

SystemInspur NF5280M5
Memory

32 GB (PC4-23400 DDR4 1933 MHz) Christian Schimmel (Unlicensed) huch, wo kommt das denn her?

apass1

  • 384 GB DDR4 (12 x 32 GB Micron 36ASF4G72PZ-2G9E2 PC4-2933 DIMMs, configured to 2666 MT/s)
  • 3 TB Optane/Apache Pass NVRAM (12 x 258496 MB Intel NMA1XXD512GPSU4, 2666 MT/s)

apass2

  • 768 GB (12 x 64 GB Samsung M393A8G40MB2-CVF PC4-2933 DIMMs, configured to 2666 MT/s)
  • 6 TB Optane/Apache Pass NVRAM (12 x 514624 MB Intel NMA1XXD512GPSU4 DIMMs, 2666 MT/s)

All DIMM slots fully populated with Optane/DRAM pairs (2:2:2 configuration). The Optane DIMMs are interleaved and a single region spans over them (per socket)

Storage

apass1:

  • 240 GB Intel SSDSC2KB24 SATA, für OS/Home
  • 1x 8T Intel SSDPE2KX080T8 NVMe SSD, Scratch (ephemeral, might be wiped/unavailable at any time)

apass2:

  • 240 GB Intel SSDSC2KB24 SATA, für OS/Home
  • 2x 8T Intel SSDPE2KX080T8 NVMe SSD, Scratch (ephemeral, might be wiped/unavailable at any time )
NetworkSingle Port Omni-Path HFI Adapter 100 Series (back-to-back connected via Cu cable)

Software

  • OS: Centos7
  • more recent software (compilers, libraries, utilities) are avaiable via environment modules (module avail). Module files are stored in /opt/local/modules.

Access

. anmeldung per support@hlrn.de

. SSH-pubkey auf blogin übergeben / von heim PC?

. .ssh/config schnipsel

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