Create tar.gz with chunks and untar

tar cvzf - dir/ | split --bytes=200MB - sda1.backup.tar.gz.

cat sda1.backup.tar.gz.* | tar xzvf -

https://unix.stackexchange.com/questions/61774/create-a-tar-archive-split-into-blocks-of-a-maximum-size

Change NFS Daemon systemd priority

 vim /usr/lib/systemd/system/nfs-server.service

 

 Add to [service]

IOSchedulingPriority=1
CPUSchedulingPolicy=fifo
CPUSchedulingPriority=20

 systemctl daemon-reload

 systemctl restart nfs-server

Check glibcxx version

 strings /usr/lib64/libstdc++.so.6 | grep GLIBCXX

GLIBCXX_3.4

GLIBCXX_3.4.1

GLIBCXX_3.4.2

GLIBCXX_3.4.3

GLIBCXX_3.4.4

GLIBCXX_3.4.5

GLIBCXX_3.4.6

GLIBCXX_3.4.7

GLIBCXX_3.4.8

GLIBCXX_3.4.9

GLIBCXX_3.4.10

GLIBCXX_3.4.11

GLIBCXX_3.4.12

GLIBCXX_3.4.13

GLIBCXX_3.4.14

GLIBCXX_3.4.15

GLIBCXX_3.4.16

GLIBCXX_3.4.17

GLIBCXX_3.4.18

GLIBCXX_3.4.19

Remove unwanted kernel & version lock

• boot in pervious kernel
• list kernels: rpm -qa kernel-core
• remove unwanted kernels: dnf remove ...
• install version lock: dnf install 'dnf-command(versionlock)'
• set version lock: dnf versionlock add kernel-core kernel-devel kernel-modules

GPU Settings

nvidia-smi -q -d POWER

nvidia-smi -i 0 -pl 100

nvidia-settings -a [gpu:0]/GPUFanControlState=1 -a [fan:0]/GPUTargetFanSpeed=70 -c :0


Notes about restoring LVM volumes

 https://www.suse.com/c/recovering-lost-lvm-volume-disk/

 Best to have backups of the config files in: /etc/lvm/backup

Connection stats grouped by status

# netstat -nat | awk '{print $6}' | sort | uniq -c | sort -n
      1 established)
      1 Foreign
     17 LISTEN
     18 SYN_SENT
    198 ESTABLISHED

Install VLC on Centos9

 > dnf install rpmfusion-free-release

> dnf install vlc

Spacemesh on Centos9

This assumes you got NVIDIA drivers loaded (525), clinfo, opencl all working. Also NVIDIA toolkit 11 installed.

POST

• git clone https://github.com/spacemeshos/post
• make install
• cp /home/srv_spacemesh/post/build/libpost.so /usr/lib64/

GPU-POST first (may not be needed anymore)

• dnf install libstdc++-static
  
• git clone https://github.com/spacemeshos/gpu-post
• cd gpu-post/
• git checkout v0.1.28
  
• git submodule update --init

vim CMakeLists.txt and comment out

#if(UNIX AND NOT APPLE)
#    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libstdc++ -static-libgcc -pthread")
#endif()

• cmake -B build -DSPACEMESHVULKAN=OFF -DCUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-12.1/
• cmake --build build -j24
• cp /home/srv_spacemesh/gpu-post/build/src/libgpu-setup.so /usr/lib64/

 Now we can run the benchmarks

• ./build/test/gpu-setup-test -c -n 100663296 -d 20
• ./build/test/gpu-setup-test -b -n 2000000

GO-SPACEMESH second

• git clone https://github.com/spacemeshos/go-spacemesh
• cd go-spacemesh/
• git checkout v0.2.21-beta.0
• make install
• make build
  
• ./build/go-spacemesh version

 SMAPP last

• git clone https://github.com/spacemeshos/smapp
• cd smapp/
• git checkout v0.2.11
• mkdir node/linux
• cp ../go-spacemesh/build/go-spacemesh node/linux/
• export NODE_OPTIONS=--openssl-legacy-provider
• yarn
• yarn package-linux

Start the app:   ./release/linux-unpacked/spacemesh_app

 

 

Check NVIDIA GPU NUMA Affinity

> nvidia-smi topo -m
        GPU0    CPU Affinity    NUMA Affinity
GPU0     X      64-127,192-254  1

Legend:

  X    = Self
  SYS  = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
  NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
  PHB  = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
  PXB  = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
  PIX  = Connection traversing at most a single PCIe bridge
  NV#  = Connection traversing a bonded set of # NVLinks

Centos9 NVIDIA drivers

• dnf makecache
• dnf config-manager --set-enabled crb
• dnf install epel-release epel-next-release -y
  
• dnf makecache
• dnf install -y kernel-headers kernel-devel tar bzip2 make automake gcc gcc-c++ pciutils elfutils-libelf-devel libglvnd-opengl libglvnd-glx libglvnd-devel acpid pkgconfig dkms
  
• dnf config-manager --add-repo http://developer.download.nvidia.com/compute/cuda/repos/rhel9/$(uname -i)/cuda-rhel9.repo
• dnf makecache
  
• dnf module install -y nvidia-driver
• dnf install -y nvtop clinfo

(dnf module install nvidia-driver:latest-dkms) 

https://linuxhint.com/install-nvidia-drivers-centos/

Force Widows Block Cache to Disk (C)

 - Powershell

Write-VolumeCache C

Centos9 enable powertools to install protobuf-compiler

 

dnf config-manager --set-enabled crb

yum install protobuf-compiler