Stuff

config/linux-server/storage-zfs.md

@@ -124,7 +124,10 @@ The installation part is highly specific to Debian 10 (Buster). The backports re
 
 ### Datasets
 
-- List datasets: `zfs list [-t {filesystem|volume|snapshot|bookmark}] [-r] [dataset]`
+- Basics:
+    - List datasets: `zfs list [-t {filesystem|volume|snapshot|bookmark}] [-r] [dataset]`
+    - Check if mounted: `zfs get mounted -t filesystem`
+    - Check if unlocked (if encrypted): `zfs get keystatus`
 - Recommended dataset options:
     - Set quota: `quota=<size>`
     - Set reservation: `reservation=<size>`
@@ -137,6 +140,8 @@ The installation part is highly specific to Debian 10 (Buster). The backports re
     - Properties may have the following sources, as seen in the "source" column: Local, default, inherited, temporary, received and none.
     - Get: `zfs get {all|<property>} [-r] [dataset]` (`-r` for recursive)
     - Set: `zfs set <property>=<value> <dataset>`
+    - Inherit: `zfs inherit [-r] [dataset]` (`-r` for recursive)
+        - See the encryption section for inheritance of certain encryption properties.
     - Reset to default/inherit: `zfs inherit -S [-r] <property> <dataset>` (`-r` for recursive, `-S` to use the received value if one exists)
 - Don't store anything in the root dataset itself, since it can't be replicated.
 

config/pc/applications.md

@@ -72,6 +72,16 @@ GUI for configuring gaming mice.
 - In `Window > Appearance`, change font to Consolas, regular, size 10.
 - In `Window > Colours`, set all ANSI non-bold colors to the same as the bold ones.
 
+## Screen
+
+### Usage
+
+#### Serial
+
+- Open serial session: `screen /dev/ttyUSB0 38400,-crtscts` (38400 baud, no flow control)
+- End session: `Ctrl+A, \`
+- Note: For some devices, you may need to use `Ctrl+H` instead of backspace.
+
 ## SMB
 
 ### Troubleshooting
@@ -101,6 +111,41 @@ GUI for configuring gaming mice.
 
 - Windows appdata dir: `steamapps/compatdata/<some_id>/pfx/drive_c/users/steamuser/AppData/`
 
+## tmux
+
+### Setup
+
+- Config files:
+    - User: `~/.tmux.conf`
+    - Global: `/etc/tmux.conf`
+- Set/fix default shell and colors (using ZSH as example):
+    - In `~/.tmux.conf`, set `set-option -g default-shell /bin/zsh` (for ZSH).
+    - In `~/.zshrc`, set `echo  "export TERM=xterm-256color" >> ~/.zshrc`.
+
+### Usage
+
+- Sessions:
+    - Start new session: `tmux new [-s <name>] [-d]`
+        - `-d` to start detached.
+    - Detach from session: `Ctrl+B D`
+    - List sessions: `tmux ls`
+    - Attach to session: `tmux attach [-d] [-t <session>]`
+        - `-d` to detach any other attached clients.
+- Enter command: `Ctrl+B :<command> Enter`
+- Windows:
+    - Switch to window: **TODO**
+- Panes:
+    - Split horizontally: `Ctrl+B "`
+    - Split vertically: `Ctrl+B %`
+    - Switch active pane: `Ctrl+B <arrow>`
+    - Show pane numbers: `Ctrl+B Q`
+    - Kill pane: `Ctrl+B X` (or exit normally)
+- Killing:
+    - Kill session: `tmux kill-session -t <session>`
+    - Kill server with all sessions: `tmux kill-server`
+- Miscellanea:
+    - Type into all panes (command): `:setw synchronize-panes`
+
 ## Vim
 
 ### Config

miscellanea/betzy.md

@@ -30,20 +30,24 @@ A mix of general XH2000 specifications and specific Betzy specifications.
     - Compute nodes: 1’344x X2410 (AMD) + 4x X2415 (A100)
     - CPUs total (excluding A100 nodes): 2’688 sockets, 86’016 cores, 172’032 threads
     - Memory: 336TiB total (excluding A100 nodes)
-    - Storage: 7.8PB (2.5PB before 2021 upgrade), DNN powered, Lustre, 51GB/s bandwidth, 500k+ metadata OPS
+    - Storage: 7.8PB (2.5PB before 2021 upgrade), DNN powered, Lustre, 51GB/s bandwidth, 500k+ metadata OPS (before 2021 upgrade)
     - Interconnect topology: DragonFly+ topology
     - Queueing system: Slurm
     - Footprint: 14.78m2 (before 2021 upgrade)
     - Power: 952kW, 95% of heat captured to water (before 2021 upgrade)
     - Cooling: Liquid cooled
-- CPU specifications (excluding A100 nodes) \[1\]\[2\]\[3\]:
-    - AMD Epyc 7742
+- CPU specifications (CPU nodes) \[1\]\[4\]:
+    - AMD EPYC Rome 7742
     - 64 cores, 128 threads
     - Clock: 2.25GHz base, 3.4GHz max boost
     - PCIe: 4.0, x128
-    - Memory: DDR4, 8 channels, 3200MHz, 204.8GB/s per socket BW
-    - Supports AVX and AVX2.
-- Compute node specifications (excluding A100 nodes) \[1\]\[2\]:
+    - Memory: DDR4, 8 channels, 3200MHz, 204.8GB/s per-socket BW
+- CPU specifications (GPU nodes) \[0\]\[14\]:
+    - AMD EPYC Rome 7452
+    - 32 cores, 64 threads
+    - Clock: 2.35GHz base, 3.35GHz max boost
+    - Memory: DDR4, 8 channels, 3200MHz, 204.8GB/s per-socket BW
+- Compute node specifications (CPU nodes) \[1\]\[2\]:
     - CPUs per node: 2 sockets, 128 kjerner, 256 threads
     - Memory: 256GiB, split into 8 NUMA nodes
     - Storage: 3x SATA or NVMe M.2 drives
@@ -57,7 +61,7 @@ A mix of general XH2000 specifications and specific Betzy specifications.
         - X2415: 2x AMD EPYC Rome/Milan CPUs and 4x Nvidia A100 SXM4 GPUs (single node).
         - X1120: 3x Intel Xeon nodes (side-by-side) (6 CPUs total).
         - X1125: 2x Intel CPUs and 4x Nvidia V100 SXM2 GPUs (single node).
-- Cabinet specifications \[8\]\[9\]:
+- Cabinet specifications (general, not Betzy specific) \[8\]\[9\]:
     - Number of blades: 4-20 in front, 4-12 in back
     - Management switches:
         - Up to 2.
@@ -68,8 +72,8 @@ A mix of general XH2000 specifications and specific Betzy specifications.
     - Alternative technologies:
         - Bull eXascale Interconnect (BXI): 48 ports, 100Gb/s
         - High-speed Ethernet: Up to 48 ports, up to 100Gb/s
-    - Topology: DragonFly+ (Betzy)
-    - Alternative topologies:
+    - Supported interconnect topologies:
+        - DragonFly+
         - Full Fat Tree
     - PSU: 6x 15kW shelves
     - Power input: 3x 63A 3-phase 400V (for EU)
@@ -81,6 +85,7 @@ A mix of general XH2000 specifications and specific Betzy specifications.
 
 ## References
 
+- \[0\] Unofficial sources.
 - \[1\] UNINETT Sigma2. "Betzy." (Accessed 2020-09-03.) https://documentation.sigma2.no/hpc_machines/betzy.html
 - \[2\] UNINETT Sigma2. "Betzy Pilot Projects." (Accessed 2020-09-03.) https://documentation.sigma2.no/hpc_machines/betzy/betzy_pilot.html
 - \[3\] SPEC CPU 2017 Integer Rate Result for Atos BullSequana XH2000 (1 socket)
@@ -93,5 +98,6 @@ A mix of general XH2000 specifications and specific Betzy specifications.
 - \[11\] UNINETT Sigma2. "Betzy Inauguration." (Accessed 2021-04-21.) https://www.sigma2.no/betzy-inauguration
 - \[12\] TOP500. "Betzy." (Accessed 2021-04-25.) https://top500.org/system/179861/
 - \[13\] UNINETT Sigma2. "Procurement Project HPC B1 (Betzy)." (Accessed 2021-04-25.) https://www.sigma2.no/procurement-project-hpc-b1
+- \[14\] AMD EPYC 7452. (Accessed 2021-05-03.) https://www.amd.com/en/products/cpu/amd-epyc-7452
 
 {% include footer.md %}

miscellanea/vilje.md

@@ -50,7 +50,8 @@ In addition to research, it was used for numerical weather prediction for MET.
 
 ## References
 
-- \[1\] First-hand inspection of a node.
+- \[0\] Unofficial sources.
+- \[1\] First-hand inspection.
 - \[2\] UNINETT Sigma2. "HPC and storage hardware." (Accessed 2021-04-25.) https://www.sigma2.no/systems
 - \[3\] NTNU HPC Group. "About Vilje." (Accessed 2021-04-25.) https://www.hpc.ntnu.no/ntnu-hpc-group/vilje/about-vilje
 - \[4\] TOP500. "SGI ICE X." (Accessed 2021-04-25.) https://top500.org/system/177817/