Resources / Blogs
How to make the Namenode leave safemode?
Here are the few simple steps that I followed to make the NameNode leave the safemode.
# hadoop fs -expunge
# sudo -u hdfs hdfs dfsadmin -safemode leave
Case studies
Client names are withheld. We are happy to share details on a call.
4 roles, 1 app
Computer repair
A web application that runs the repair business end to end: a customer portal for booking and tracking repairs, and separate workspaces for technicians, accountants and administrators. Phase one went live in June 2026; phase two is in progress.
Four role-based workspaces in one appPhase one live in June 2026Card → follow-up
Sales & events
Scan cards, PDFs or QR codes at an event and get deduplicated leads with AI-drafted follow-ups that send from your own Outlook. A web application on Azure with a mobile companion app in beta.
Leads deduplicated automaticallyFollow-ups drafted in your own mailboxEvery change, flagged
Food manufacturing
Compares two versions of a product label, highlights every change, annotates the PDF and returns an audit-ready list of differences. We moved it from Copilot Studio to Azure Functions when the document processing outgrew the low-code platform.
Audit-ready differences in one chat turnRebuilt from low-code to cloud functionsKeep reading
June 29, 2026
June 10, 2026
May 1, 2026
Talk to the engineers who write these articles. We will look at your setup and tell you what to do first.
Princeton IT Services