Technical articles. No filler.
A web application firewall inspects HTTP requests and blocks known attack patterns like SQL injection, XSS and path scanning. But it is a filtering layer, not a substitute for secure code, and it needs tuning so it does not block your legitimate users.
OPcache stores compiled code in memory so PHP skips re-parsing every file on every request, often lifting throughput two to three times. JIT is an added gain for compute-heavy work, not for web apps dominated by I/O.
node_exporter collects CPU, memory, disk, and network, Prometheus stores them as time series, and Grafana visualizes and alerts. Here is how to build a useful dashboard and set an alert that reaches you before the disk fills or memory runs out.
RAG makes a model answer from your own documents, not its general knowledge, in five steps: chunk, embed, store, retrieve, generate. Self-hosting keeps sensitive data inside your server, and a medium knowledge base fits on a server with 8 to 16GB of RAM.
A password alone is no longer enough for control panels and SSH. Two-factor authentication adds a second factor, a TOTP code or a hardware key, so your account stays safe even if the password leaks. This is a practical setup and recovery guide.
Enable slow_query_log to catch heavy queries, then read EXPLAIN to see whether MySQL scans the whole table or uses an index. The right index turns a query from scanning a million rows to reading ten, cutting vCPU use by a measurable margin.
The advertised plan price is only part of the story. Total cost of ownership adds backups, licenses, bandwidth, admin time, and the price of downtime. Here are the hidden items with a realistic table on Cloud's plans, and how to compute TCO before deciding.
HAProxy is a load balancer that sits in front of several application servers, spreads requests across them by an algorithm you choose, and constantly checks their health, pulling a failed one out automatically. It gives you higher capacity and fault tolerance with no downtime the visitor sees.
Quantization shrinks a model's weights from 16 bits to 4, 5, or 8 bits, cutting its memory footprint to roughly a quarter with a small quality loss. That means running a 7B model on 8GB of RAM, or 13B on 16GB, on a CLOUD server.
