Page 89 - Mironsoft Blog

A failed disk, a destroyed bootloader, or a complete hardware failure usually hits teams without warning. Bare metal recovery is the discipline of rebuilding a server from nothing, including partition table, bootloader, and operating system, with no working base install left to rely on. Teams that plan and rehearse this case in advance need hours instead of days.

Once a project grows past a handful of message handlers, it quickly becomes clear that concerns like logging, execution time measurement, or wrapping work inside a database transaction shouldn't be duplicated inside every single handler. The Symfony Messenger bus solves exactly this problem with a middleware chain that every message passes through before and after reaching its handler, similar in spirit to an HTTP kernel event, but specific to the messaging layer. This article walks through implementing custom middleware, registering it at the right spot in the chain, and where the line to classic event listeners sits.

A rolling upgrade updates an Elasticsearch or OpenSearch cluster node by node, while the cluster keeps serving requests the entire time. Anyone who correctly disables shard allocation before every node restart and respects the version compatibility rules between major versions can move production clusters to a new version without any planned downtime.

A race condition arises when two or more requests read and modify the same data nearly simultaneously without the application coordinating this shared access, letting an attacker bypass a check that works correctly under single execution by deliberately firing multiple requests at once. Such vulnerabilities are especially tricky because the affected code appears completely bug-free under normal, sequential testing, and the problem only surfaces under deliberately induced, high concurrency.

The infer keyword is the key to many TypeScript utility types and lets you extract partial types such as the resolved value of a Promise or the parameters of a function directly from an existing type without duplicating them by hand. Understanding how infer works inside conditional types lets you build your own utility types, avoid duplication, and keep derived types automatically in sync with their source.

Font files are often among the largest individual resources on a page, even though most of their content never gets displayed. Font subsetting and variable fonts can drastically cut the transferred data volume without users noticing any visible difference in typography.

Chasing Magento performance problems by guesswork wastes time on the wrong things. This article shows how to use Blackfire, Xhprof and Tideways, and the built-in Magento Profiler to read flame graphs, identify slow observers and plugins, and compare profiles cleanly, including safe sampling in production.

Without rate limiting, a single misbehaving client loop or a targeted attack is enough to bring a PHP API to its knees. Building your own rate limiting is straightforward with Redis and a few lines of PHP, with no third party gateway required, and the choice between fixed window, sliding window and token bucket determines how fair and how burst tolerant the protection actually turns out to be.

Redis nodes confined to a single availability zone are powerless against the loss of that exact zone, no matter how well internal replication is configured. A well thought out distribution of masters and replicas across multiple zones significantly increases resilience, but it requires deliberate decisions about latency, network cost and the limits of cloud-managed Redis offerings.

Without ElementInternals, a hand-built Custom Element could never truly participate in a form element: no automatic entry in FormData, no native validation, no :invalid styling. The ElementInternals API closes that gap through attachInternals(), setFormValue(), and setValidity(), turning an ordinary Custom Element into a full-fledged form control.