Beating $3k SSD with $2k HDD?
A.K.A. Practical ZFS application on USTC Mirrors. A writeup of the talk I gave at Nanjing University this August.
Make Python 3.12 install user packages without complaints
I have a habit of pip3 install --user and then expecting these packages under ~/.local/lib/ to be available for my Python scripts whenever I need them. However, with PEP 668 landing in Python 3.12,...
Why my IPv4 gets stuck? - Debugging network issues with bpftrace
I run a Debian-based software router on my home network. It’s connected to multiple ISPs, so I have some policy routing rules to balance the traffic between them. Some time ago, I noticed that the ...
Driving pppd with systemd
I moved my soft router (Intel N5105, Debian) from school to home, and at home it’s behind an ONU on bridge mode, so it’ll have to do PPPoE itself.
Migrating Ubuntu onto ZFS
As part of a planned disk migration, I decided to move my Ubuntu installation from a traditional ext4 setup to ZFS. I did a lot of preparation and research, but things went much smoother than I had...
Reload SSL certificates with systemd
Recently I relinquished an old domain on my server and had to re-issue a certificate to drop that domain off. Previously it ran Let’s Encrypt’s official client Certbot, set up back in 2019. All my ...
I almost broke our lab’s storage server…
Recently we discovered that both SSDs on our storage server were giving worrisome SMART values, so we started replacing them. One of them was used only for ZFS L2ARC, so pulling it out was easy. Th...
My firewall solution for RDP
Today I stumbled upon this V2EX post (Simplified Chinese) where the OP shared their PowerShell implementation of a “makeshift fail2ban” for RDP (their GitHub repository). Their script looked very c...