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Object Lifecycle Management

Object Lifecycle Management

1
posts
2026

Pinecone has implemented 'Janitor', a robust system for managing object lifecycle and safely deleting billions of objects at scale. This system addresses the challenges of immutable storage by identifying and removing stale and orphaned objects through distinct 'Normal', 'Orphan', and 'Customer Deletion' modes. Janitor employs a core protocol of 'Identify -> Verify -> Execute' to ensure safe and auditable deletion, with advanced property-based testing using a mock clock to validate complex, time-dependent behaviors. This infrastructure ensures predictable storage costs and operational reliability by automating garbage collection.

2026

Garbage Day: How Pinecone Safely Deletes Billions of Objects at Scale

3/5/2026

This post introduces 'Janitor', a new system designed to safely delete billions of objects at scale in Pinecone's immutable blob storage. It details the challenges of managing stale and orphaned objects due to immutability and propagation lag. The system is broken down into three modes: 'Normal' for everyday superseded files, 'Orphan' for files from crashed processes, and 'Customer Deletion' for user-initiated data removal with a 30-day recovery window. The core protocol involves 'Identify' (candidate generation), 'Verify' (rechecking reachability against fresh system state), and 'Execute' (safe, idempotent deletion). It also highlights the use of property-based testing with a mock clock to simulate and test complex, time-dependent behaviors over long periods.