update README and hardware overview

# GPU cluster

# GPX cluster

Information about the private GPU cluster located in a former prison cell at Trojanova 13, Prague.

Information about the GPX cluster located in a former prison cell at Trojanova 13, Prague.

## Getting started

The cluster can be accessed via SSH on port 22.

For example:

    ssh <user>@gp3.fjfi.cvut.cz

    ssh <username>@<nodename>.fjfi.cvut.cz

User authentication is done by _public-key cryptography_ using the key established during account registration.

The available _node names_ are `gp1`, `gp2`, ..., `gp9`.

After a successful login, a short information message about the system will be displayed.

You can also follow the documentation below to find more details.

<img src="DSC08103_popis.JPG" title="GPU cluster" width=50%>

## Login node (gp3.fjfi.cvut.cz)

## Login nodes

This section lists all nodes that have a DNS record and are available via SSH from the public network.

The main login node is __gp3.fjfi.cvut.cz__, which has the largest disk array and is connected to the [compute nodes](#compute-nodes-gp11-14) via a fast 10 Gbit Ethernet network.

### gp1.fjfi.cvut.cz

- CPU:

  2× [Intel Xeon E5-2630 v3](https://ark.intel.com/content/www/us/en/ark/products/83356/intel-xeon-processor-e5-2630-v3-20m-cache-2-40-ghz.html)

  (8 cores @ 2.4-3.2 GHz, 20 MiB cache)

- RAM:

  8× 16 GiB DDR4 ECC 2133 MT/s

- GPU:

  1× [Nvidia Quadro P6000](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#Quadro_Pxxx_series)

  (3840 cores @ 1.5 GHz, 24 GiB GDDR5X, compute capability 6.1)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/home/`: 1 TB WD Caviar Black

### gp2.fjfi.cvut.cz

- CPU:

  1× [AMD Ryzen 9 5950X](https://www.amd.com/en/products/cpu/amd-ryzen-9-5950x)

  (16 cores @ 3.4-4.9 GHz, 64 MiB cache)

- RAM:

  4× 32 GiB DDR4 3200 MT/s CL16

- GPU:

  2× [Nvidia GeForce GTX 1060](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#GeForce_10_series)

  (1280 cores @ 1.77 GHz, 6 GiB GDDR5X, compute capability 6.1)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/mnt/gp2/`: 4× 6 TB disks (Seagate IronWolf, WD Gold, Seagate Exos) (RAID 0)

### gp3.fjfi.cvut.cz

- CPU:

  1× [Intel Core i9-9900KF](https://ark.intel.com/content/www/us/en/ark/products/190887/intel-core-i9-9900kf-processor-16m-cache-up-to-5-00-ghz.html)

  2× [Nvidia GeForce GTX 1080Ti](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#GeForce_10_series)

  (3584 cores @ 1.62 GHz, 11 GiB GDDR5X, compute capability 6.1)

- Local storage:

    - `/`: 120 GB SSD (KINGSTON SA400S37120G)

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/mnt/gp3/`: 4× 16 TB Seagate Exos X16 (RAID 0)

The `/mnt/gp3/` file system is __not backed up__ and since it is on RAID 0, even __a single drive failure would mean destruction of all data__.

Hence, users are advised not to keep valuable data here or make their own backups if needed.

### gp4.fjfi.cvut.cz

The `/mnt/gp3/` storage is shared with compute nodes over network.

- CPU:

  1× [Intel Core i7-9800X](https://ark.intel.com/content/www/us/en/ark/products/189122/intel-core-i7-9800x-x-series-processor-16-5m-cache-up-to-4-50-ghz.html)

  (8 cores @ 3.8-4.5 GHz, 16 MiB cache)

- RAM:

  4× 16 GiB DDR4 3200 MT/s CL16

- GPU:

  2× [Nvidia GeForce GTX 3060](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#RTX_30_series)

  (1792 cores @ 1.78 GHz, 12 GiB GDDR6, compute capability 8.6)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/home/`: 1 TB WD Re

### gp5.fjfi.cvut.cz

- CPU:

  1× [Intel Xeon E5-2640 v4](https://ark.intel.com/content/www/us/en/ark/products/92984/intel-xeon-processor-e5-2640-v4-25m-cache-2-40-ghz.html)

  (10 cores @ 2.4-3.4 GHz, 25 MiB cache)

- RAM:

  4× 16 GiB DDR4 ECC 2133 MT/s

- GPU:

  2× [Nvidia GeForce GTX 3060](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#RTX_30_series)

  (1792 cores @ 1.78 GHz, 12 GiB GDDR6, compute capability 8.6)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/home/`: 1 TB WD RED

### gp6.fjfi.cvut.cz

- CPU:

  1× [Intel Core i9-9820X](https://ark.intel.com/content/www/us/en/ark/products/189121/intel-core-i9-9820x-x-series-processor-16-5m-cache-up-to-4-20-ghz.html)

  (10 cores @ 3.3-4.2 GHz, 16 MiB cache)

- RAM:

  4× 16 GiB DDR4 2666 MT/s

- GPU:

  2× [Nvidia GeForce GTX 3060](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#RTX_30_series)

  (1792 cores @ 1.78 GHz, 12 GiB GDDR6, compute capability 8.6)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/home/`: 1 TB WD Red

### gp7.fjfi.cvut.cz

- CPU:

  1× [Intel Core i9-9900KF](https://ark.intel.com/content/www/us/en/ark/products/190887/intel-core-i9-9900kf-processor-16m-cache-up-to-5-00-ghz.html)

  (8 cores @ 3.6-5.0 GHz, 16 MiB cache)

- RAM:

  3× 16 GiB DDR4 2666 MT/s CL16

  1× 8 GiB DDR4 2133 MT/s

- GPU:

  2× [Nvidia GeForce GTX 3060](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#RTX_30_series)

  (1792 cores @ 1.78 GHz, 12 GiB GDDR6, compute capability 8.6)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/home/`: 2 TB WD Red

### gp8.fjfi.cvut.cz

- CPU:

  1× [AMD Ryzen 9 5950X](https://www.amd.com/en/products/cpu/amd-ryzen-9-5950x)

  (16 cores @ 3.4-4.9 GHz, 64 MiB cache)

- RAM:

  4× 32 GiB DDR4 3200 MT/s CL16

- GPU:

  1× [Radeon RX 570](https://www.amd.com/en/support/graphics/radeon-500-series/radeon-rx-500-series/radeon-rx-570)

  (2048 cores @ 1.17 GHz, 8 GiB GDDR5, architecture gfx803)

- Local storage:

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

    - `/mnt/gp8/`: 2× 1 TB WD Green (RAID 0)

### gp9.fjfi.cvut.cz

- CPU:

  2× [Intel Xeon E5-2640 v4](https://ark.intel.com/content/www/us/en/ark/products/92984/intel-xeon-processor-e5-2640-v4-25m-cache-2-40-ghz.html)

  (10 cores @ 2.4-3.4 GHz, 25 MiB cache)

- RAM:

  8× 16 GiB DDR4 ECC 2400 MT/s

- GPU:

  2× [Nvidia Tesla P100](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#Tesla)

  (3584 cores @ 1.48 GHz, 16 GiB HBM2, compute capability 6.0)

- Local storage:

    - `/`: 4× 480 GB SSD (Intel SSDSC2BB48) (RAID0)

## Compute nodes (gp[11-14])

  2× [Nvidia GeForce RTX 2070 Super OC](https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units#GeForce_20_series)

  (2560 cores @ 1.78 GHz, 8 GiB GDDR6, compute capability 7.5)

- Local storage:

    - `/`: 120 GB SSD (KINGSTON SA400S37120G)

    - `/`: 960 GB SSD (KINGSTON SA400S37960G)

## Network

The compute nodes are not accessible from the outside network, they must be accessed from the login node.

Internet access from the compute nodes is provided via [NAT](https://en.wikipedia.org/wiki/Network_address_translation) on the login node.

The `/mnt/gp3/` file system is __not backed up__ and since it is on RAID 0, even __a single drive failure would mean destruction of all data__.

Hence, users are advised not to keep valuable data here or make their own backups if needed.

The `/mnt/gp3/` storage is shared with compute nodes over network.

## Other nodes

Other nodes (gp{1,2,4,5,6}) are not connected to the 10 Gbit switch and cannot be used for distributed computations.