Proven Results for UK Merchants
Real-world examples of how our Magento-optimised infrastructure solves performance, security, and scaling challenges.
Peak Load Performance: Traffic Spike During Flash Sale
The Challenge
A UK fashion retailer experienced severe database locking during flash sales, causing abandoned carts and lost revenue. Their previous host couldn't handle concurrent checkout sessions.
Our Approach
We migrated to our Nginx + Varnish + Redis stack with NVMe storage. Varnish cached product pages while Redis handled sessions, eliminating database contention.
Stack Used
Measurable Results
- Faster TTFB achieved
- Traffic spike handled smoothly
- Fewer checkout timeouts
- Cart abandonment reduced
Security Event: DDoS Attack Blocked in Minutes
The Challenge
An electronics retailer faced a massive botnet DDoS attack during their busiest weekend. Traditional WAF solutions were overwhelmed and blocked legitimate customers.
Our Approach
Our upstream network DDoS mitigation absorbed the volumetric flood in the network, before it could reach the store's server. Sentinel and our engineers watched the event throughout and dealt with the smaller application-level requests that got through, without affecting real shoppers.
Stack Used
Measurable Results
- Volumetric flood absorbed upstream
- Legitimate traffic kept flowing
Migration Success: Legacy Dedicated to Modern Cloud Stack
The Challenge
A B2B industrial supplies company ran Magento 1.9 on an aging dedicated server. Upgrade to Magento 2.4 required a complete infrastructure overhaul without disrupting orders.
Our Approach
Our migration team performed a parallel environment build, extensive testing, and coordinated DNS cutover during low-traffic hours. Cron schedules and custom integrations were preserved.
Stack Used
Measurable Results
- Large database migrated
- Complex cron schedule preserved
- DNS switch completed quickly
- Orders kept flowing during transition
Database Stability: Resolving Chronic Cron Lock Issues
The Challenge
A home goods retailer experienced daily cron failures: stuck indexers, duplicate jobs, and MySQL deadlocks. Their admin panel showed constant warnings about cron_schedule table bloat.
Our Approach
Sentinel now watches every cron job and alerts our engineers to stuck or failed runs, so they are cleared before they pile up. Redis moved session storage off disk, and NVMe storage accelerated index writes.
Stack Used
Measurable Results
- Cron failures eliminated
- Indexer runtime reduced
- Admin panel responsive again
- Automated cron monitoring, with alerts to our engineers
Bot Mitigation: Stopping Search Abuse and Scraping
The Challenge
A beauty retailer noticed OpenSearch becoming unresponsive during peak hours. Investigation revealed aggressive scraping bots hammering the search API, consuming resources meant for real customers.
Our Approach
Sentinel spotted the abusive search patterns and the unusual session growth behind them. Our engineers identified the bots and rate-limited them without affecting legitimate users.
Stack Used
Measurable Results
- Bot traffic reduced
- OpenSearch response times normalised
- Real customer searches unaffected
- Ongoing protection via automated rules
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