Eliminating Deployment Downtime with PM2 Cluster Mode
Learn how to use PM2 Cluster Mode to eliminate deployment downtime. This guide covers ecosystem configuration, rolling restarts, and the necessity of stateless architecture.
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nodejsAchieving Zero-Downtime Node.js Deploys with PM2 Cluster Mode
Stop dropping requests during deployments. Learn how to use PM2 cluster mode and rolling reloads to achieve zero-downtime updates for Node.js apps.
Dovecot Clustered Configuration vs. External Storage Replication for Zero-Downtime Migration
Dovecot Clustered Configuration vs. External Storage Replication for Zero-Downtime Migration The objective is to migrate a small Dovecot deployment to a new node configuration while preserving continuous service availability for existing mail clients. Key constraints involve determining whether Dovecot's hot reload mechanism can synchronize module settings a
dovecotVert.x Event Bus request-response timeout behavior in clustered environments
Distributed Message Handling The Vert.x Event Bus facilitates request-response patterns across clustered JVM nodes using a cluster manager for routing. When a sender dispatches a message to a specific address, the system distributes the request among available handlers, typically via round-robin load balancing. Resource Management and Timeouts In high-throug
vertxVert.x Event Bus and Hazelcast: Multicast vs Static Discovery in Cloud
Cluster Manager Interoperability Vert.x uses an Event Bus that runs in standalone mode by default. For production, clustering via a Cluster Manager such as Hazelcast extends the bus across multiple JVMs. A common discrepancy arises between local development, where multicast discovery works on a LAN, and cloud environments (AWS, GCP) where multicast is blocke
Silent message loss in Phoenix.PubSub when scaling to a second non‑clustered node
Goal: Determine the safest, lowest‑cost approach to handle Phoenix.PubSub when a low‑traffic application might later be scaled to a second node. Constraints: The current cheapest setup runs a single release with server mode enabled, relies on the default PG2‑style PubSub adapter, and accepts a brief availability gap during each deploy. Adding a second node w