NoSQL databases have matured considerably and now handle a significant portion of production workloads. The landscape has shifted toward specialized solutions rather than one-size-fits-all approaches. Here’s a breakdown of the most widely deployed options: Document Stores MongoDB remains the most popular document database. It’s production-ready, well-documented, and offers strong consistency guarantees with replica sets. The…
Your iPhone’s touchscreen can serve as a remote input device for your Linux desktop or laptop. Here are the most practical approaches. WiFi Mouse Method The WiFi Mouse application lets you control your Linux system’s cursor and clicks from your iPhone over a local network. Setup: Install the iPhone app: Download WiFi Mouse from the…
SQL layers abstract traditional relational query interfaces over distributed NoSQL and big data systems, enabling applications to leverage SQL’s familiarity while benefiting from horizontal scalability. Here are the key approaches and systems that have emerged in this space. Distributed SQL on Key-Value Stores Phoenix (Apache Phoenix) provides a SQL interface over HBase. It compiles SQL…
WordPress’s default block editor works fine for most users, but if you’re comfortable with Markdown—especially for code-heavy technical posts—you’ll want a solid setup that doesn’t corrupt existing content or create maintenance headaches. The key requirement: your solution must preserve Markdown in the database and render it on demand, rather than converting it to HTML and…
SSH tunneling is one of the most reliable ways to create a secure proxy on Windows. You can route traffic through a remote SSH server, encrypting your connection and bypassing local network restrictions. Prerequisites You’ll need: An SSH server with valid credentials An SSH client (Windows 10/11 includes OpenSSH, or use PuTTY, Git Bash, or…
Directory listing exposes your file structure to visitors and can be a security concern. Apache’s .htaccess file provides a straightforward way to disable this behavior while still allowing direct file access. Basic Implementation Create a .htaccess file in the directory where you want to disable listing: Options -Indexes Place this file in the root directory…
MySQL Cluster uses NDB (Network Database) storage engine to provide high availability and data redundancy across multiple nodes. This guide covers installation and configuration on modern RHEL-compatible systems. Prerequisites Three or more servers (minimum: one management node, two data nodes, one SQL node) Rocky Linux 9 or AlmaLinux 9 Root or sudo access Static IP…
Standard Markdown syntax doesn’t include built-in parameters for image dimensions. The basic syntax  produces images at their original size or constrained by container width, with no way to specify explicit dimensions. If you need to control image size, you have several options depending on your use case and platform. HTML <img> Tag The…
Linux can manage multiple swap partitions or files simultaneously, each with an assigned priority. The kernel allocates swap pages from highest to lowest priority, with round-robin allocation among equally-prioritized areas. Setting Swap Priority with swapon Use the swapon command to activate a swap partition and set its priority: swapon -p 10 /dev/sdc1 The -p flag…
To disable all active swap spaces on Linux, run: swapoff -a The -a flag targets all currently enabled swap devices and files. This forces the kernel and applications to rely entirely on physical RAM. When You’d Do This Disabling swap is useful for: Performance testing: Eliminating swap I/O variance to get consistent benchmarks Latency-sensitive workloads:…
The strcmp() and strncmp() functions are fundamental string comparison utilities in the C standard library. Understanding their implementations reveals important aspects of character comparison, null-termination handling, and performance optimization. strcmp Implementation The glibc implementation of strcmp() performs lexicographic comparison of two null-terminated strings, returning: A negative value if the first string is lexicographically less than…
To enable debugging, configure your CMake build with CMAKE_BUILD_TYPE set to Debug. This tells CMake to invoke the compiler with the -g flag, generating debug symbols that tools like gdb and lldb need. From your project’s root directory: cmake -DCMAKE_BUILD_TYPE=Debug -B build cd build make The -B build flag creates a separate build directory, which…
If you’re running a site with limited resources, a free CDN can significantly improve performance and reduce bandwidth costs. Here are the current options worth considering. Cloudflare https://www.cloudflare.com Cloudflare remains the most popular free CDN choice for good reason. Their free tier includes: Global edge network with automatic content caching and optimization DDoS protection and…
If you’re evaluating hosting providers in 2026, the landscape has shifted considerably from the shared hosting dominance of the early 2020s. Before committing to a provider, understand what you’re actually getting and what limitations matter. Shared Hosting Limitations to Watch Traditional shared hosting providers like Hostgator, Bluehost, and Dreamhost still exist, but they come with…
X11 forwarding over SSH lets you run graphical applications on remote systems and display them locally. Firefox is a common use case, though it requires careful configuration to avoid crashes and permission issues. Basic Setup The simplest approach uses X11 forwarding: ssh -X remotehost The -X flag enables trusted X11 forwarding. For untrusted forwarding (more…
The conventional wisdom that smaller code is always better has been thoroughly invalidated on modern processors. A statement from kernel development circles captured this well: for performance-critical paths like interrupt handlers, large-but-correctly-aligned-and-optimized code consistently outperforms byte-packed alternatives. Consider this comparison: mov eax, [foo] add eax, 1 mov [foo], eax versus: inc [foo] The three-instruction sequence…
Archiving or copying a 1TB sparse file containing only 32MB of actual data is impractical with naive approaches—you’ll waste time and I/O bandwidth copying zeros. The solution is using SEEK_HOLE and SEEK_DATA flags with lseek(), which allow tools to skip over hole regions entirely. How SEEK_HOLE and SEEK_DATA work The Linux kernel provides two additional…
NFSv4 significantly simplifies network exposure compared to NFSv3. Where NFSv3 requires managing multiple dynamic ports (mountd, statd, lockd), NFSv4 uses only port 111 (rpcbind) and port 2049 (NFS). This makes firewall configuration and port forwarding straightforward. For production environments, consider implementing Kerberos authentication (krb5, krb5i, or krb5p) instead of relying solely on network-based access control….
This post covers .NET Core 2.1, which released in May 2018. Some of the predicted features below didn’t materialize as described; we’ll clarify what actually landed versus what was speculated. What is .NET Core? .NET Core is Microsoft’s open-source, cross-platform runtime for building applications in C#, F#, and Visual Basic. Unlike the monolithic .NET Framework…
Hibernate Envers is a proven auditing framework that automatically tracks changes to JPA entities without cluttering your domain model with logging code. It stores historical data in separate audit tables and lets you query entity states at any point in time. Why Use Hibernate Envers Envers handles the mechanics of change tracking transparently: Audits all…