Paper Reading: Are You Sure You Want to Use MMAP in Your Database Management System?
Paper reading for [CIDR 2022] Are You Sure You Want to Use MMAP in Your Database Management System? by Crotty et al.
LVM metadata exceeds maximum metadata size, now what next?
An LVM volume group (VG) on our Proxmox VE cluster has failed to create new logical volumes, reporting that its metadata was full. At first this appears to be easy, “fine I’ll just add more space f...
Taking the 24 puzzle game to the next level
The 24 game is a classic math game where players try to arrange 4 integers into 24 using basic arithmetics (addition, subtraction, multiplication and division). Thanks to its popularity, it’s now a...
Centralized Linux authentication with OpenLDAP
LDAP, the #1 way to get your graduation delayed (as has always been the meme around Tsinghua University), is every SysAdmin’s dream tool for their servers. As mighty as its rumors fly, LDAP takes t...
Install Proxmox VE on eMMC
Recently I bought a mini PC looking forward to setting up a home router. It started quite well except the specs were higher than I anticipated. 8 GB RAM plus 128 GB eMMC - too much waste for “just ...
New Pandora’s box: Install Linux and Windows onto the same NTFS partition
Linux 5.15 is shipped with a brand new driver for Microsoft’s classic NTFS filesystem, NTFS3. Unlike the decades-old open-source NTFS-3G project, which is based on FUSE and have always received cri...
Reinstall Windows VPS into Linux with iPXE network boot
This November I found a discount from one of my favorite VPS providers, NETfront. They offered Linux VPS with 2 vCPUs and 2 GB RAM at HK$56/mo, and also Windows VPS with 4 vCPUs and 4 GB RAM at HK$...
Secure site-to-site connection with Linux IPsec VPN
Linux has a built-in framework for Internet Protocol Security (IPsec), which is often combined with other tunneling technologies (e.g. L2TP and GRE) to create secure cross-site network connections....