Learning
NFS Over RDMA
· β˜• 5 min read
1. Prerequisites The storage and the nodes that use it form an RDMA network The RDMA devices are configured with IP addresses If you are using Mellanox NICs, add the -with-nfsrdma parameter when installing the driver 1 ./mlnxofedinstall --with-nfsrdma 2. Starting the Server Install dependencies 1 apt install nfs-kernel-server rdma-core -y Load the kernel module 1 modprobe svcrdma Add the port to portlist 1 echo 'rdma 20049' | tee /proc/fs/nfsd/portlist Export directory 1 mkdir /data1/nfs 1 2 3 vim /etc/exports /data1/nfs *(rw,sync,no_root_squash,no_all_squash) Start the NFS service 1 systemctl start nfs-server.

kubectl logs Cannot View Pod Logs and Reports NotFound
· β˜• 2 min read
1. Symptoms Pod information can be viewed 1 2 3 4 kubectl -n my-testns get pod my-testpod NAME READY STATUS RESTARTS AGE my-testpod 1/1 Running 0 2d13h Pod logs cannot be viewed 1 2 3 kubectl -n my-testns logs my-testpod -f Error from server (NotFound): the server could not find the requested resource ( pods/log my-testpod) On the host where the Pod runs, the container logs can be viewed with docker logs.

Using Calico to Limit Pod Bandwidth
· β˜• 5 min read
1. Testing the Full Bandwidth Start the iperf3 server on the target host 1 2 3 4 5 iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Test from the client host 1 iperf3 -c x.x.x.x -p 5201 -t 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Connecting to host x.

Learning the Structure of Large Models Using Qwen as an Example
· β˜• 4 min read
1. Introduction to the Qwen Model In April 2023, Alibaba released the beta version of Qwen. In December 2023, Alibaba open-sourced the first version of Qwen. In September 2024, Alibaba released Qwen2.5. In January 2025, Alibaba released Qwen 2.5-Max. Qwen 2.5 is the latest series of the Qwen large language

Building Multi-Arch Images with Nerdctl
· β˜• 3 min read
1. Installing Nerdctl Install Opscli 1 curl -sfL https://raw.githubusercontent.com/shaowenchen/ops/main/getcli.sh |VERSION=latest sh - Install Nerdctl 1 opscli task -f install-nerdctl --arch amd64 2. BuildKit Download Buildkit 1 wget https://github.com/moby/buildkit/releases/download/v0.19.0-rc2/buildkit-v0.19.0-rc2.linux-amd64.tar.gz Install Buildkit 1 2 tar xvf buildkit-*.tar.gz mv bin/* /usr/local/bin/ Configure Buildkitd 1 mkdir -p /etc/buildkit /data/buildkit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 cat > /etc/buildkit/buildkitd.