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Storage & Data Transfer

Unlocking the future of shared storage: Filestore on Colossus

August 6, 2026

Jerome McFarland<br>Senior Product Manager

Itai Steiner<br>Engineering Manager

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Today,  enterprise storage must be as agile, elastic, and responsive as the workloads it supports. Filestore, Google Cloud’s first-party, secure, scalable NFS file service, can service a wide-range of enterprise use cases as well as cutting-edge AI and agentic workflows. Today, we’re sharing a major enhancement: Filestore now incorporates a cloud-native backend storage layer built directly on Colossus, Google’s foundational distributed storage system. Leveraging Colossus, Filestore can deliver even greater flexibility and scalability to support the most demanding modern workloads.

Colossus: A foundation of global scale

As a first-party service, Filestore is positioned to leverage the best of Google’s infrastructure-level innovation. By leveraging Colossus, Filestore now utilizes the same infrastructure DNA that powers Google’s biggest global services, including YouTube, Gmail, and Gemini. This platform-level upgrade enables superior scalability and operational efficiency compared to legacy VM-based architectures, providing a robust foundation for your data.

This also allows Filestore to decouple storage capacity and performance. Now you can provision IOPS independently to precisely meet workload demands without having to over-provision capacity, supporting a broad range of workloads — from small developer environments to massive datasets.

This decoupled scale is especially powerful when applied to containerized environments. Through the Filestore CSI driver, Filestore delivers persistent, high-performance storage for GKE workloads with enterprise-grade reliability and availability. To further optimize resource utilization at scale, Filestore multishares for GKE lets you segment a single Filestore instance into many smaller shares, starting at just 10 GiB. This means AI teams can scale out their GKE clusters efficiently, carving up large high-performance instances into smaller, project-specific shares to support thousands of concurrent containers, without sacrificing performance or increasing TCO.

Shared storage for agentic swarms

The combination of decoupled performance and deep GKE integration enables a critical new use case: high-concurrency workspaces for AI agent swarms, where multiple specialized, autonomous AI agents collaborate in parallel to accomplish complex goals. In an agentic workflow, multiple agents often need to read from and write to a common dataset simultaneously to maintain state and share context. Filestore file shares act as these common workspaces leveraging the NFS protocol to provide consistent file system access across the swarm.

Backed by Colossus, Filestore can support millions of agents, working independently or securely collaborating with shared data. By utilizing NFS file locking, Filestore helps ensure strict data consistency, preventing conflicts even as swarms grow in size and complexity. This allows AI agents to maintain a unified view of their environment, enabling more complex reasoning and collaboration.

Operational agility and enterprise-grade control

Beyond performance, this enhancement improves operational agility. Now, you can independently scale IOPS via Custom Performance settings, optimizing costs in real-time without having to rebuild clusters. Furthermore, the distributed storage layer provides faster failure recovery and zero-downtime capacity changes compared to traditional monolithic storage architectures. Filestore is also providing security at scale via deep integration with Google Cloud IAM, NFS User IDs and Group IDs (UIDs/GIDs), and IP Access Control Lists (ACLs).

Building for the next era of data

This Filestore update reflects our commitment to meeting the changing needs of AI-era workflows and lays the foundation for future enhancements. By providing a first-party, deeply integrated service that evolves with your needs, we are helping you maximize your business potential flexibly and cost-efficiently. Get started today by visiting the Filestore page.

Posted inStorage & Data Transfer

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