Why high performance storage is important for AI Cloud Build

The AI cloud market is experiencing exceptionally rapid growth worldwide, with the latest reports projecting annual growth rates between 28% and 40% over the next five years. It may reach up to $647 billion by 2030 as per various analyst reports. The surge in AI Cloud adoption, GPU-as-a-service platforms, and enterprise interest in AI “factories” has created new pressures and opportunities for product engineering and IT leaders. Regardless of which public cloud or private cluster you choose, one key differentiator sets each AI and HPC solution apart: the performance of storage.

While leading clouds often use the same GPUs and servers, the way data flows—between compute, network, storage, and persistent layers—determines everything from training speed to scalability. Understanding storage fundamentals will help you architect or select the right solution. We have previously covered how to build AI cloud solutions and with hands-on experience in this space, we would like to cover our thoughts around it in this article.

Business and technology leaders now recognize that real-world AI breakthroughs require infrastructure with high bandwidth, low latency, and extreme parallelism. As deep learning and data-intensive analytics move from labs to production, GPU clusters run ever-larger models on ever-growing datasets.

Why Does Storage Matter in AI Workloads?

Storage plays an important role across the entire AI lifecycle. Let’s look into all three major areas: data preparation, training & tuning, and inference.

Data Preparation

Key Tasks

• Scalable and performant storage to support transforming data for AI use
• Protecting valuable raw and derived training data sets

Critical Capabilities

• Storing large structured and unstructured datasets in many formats
• Scaling under the pressure of map-reduce like distributed processing often used for transforming data for AI
• Support for file and object access protocols to ease integration

Training & Tuning

Key Tasks

• Providing training data to keep expensive GPUs fully utilized
• Saving and restoring model checkpoints to protect training investments

Critical Capabilities

• Sustaining read bandwidths necessary to keep training GPU resources busy
• Minimizing time to save checkpoint data to limit training pauses
• Scaling to meet demands of data parallel training in large clusters

Inference

Key Tasks

• Safely storing and quickly delivering model artifacts for inference services
• Providing data for batch inferencing

Critical Capabilities

• Reliably storing expensive to produce model artifact data
• Minimizing model artifact read latency for quick inference deployment
• Sustaining read bandwidths necessary to keep inference GPU resources busy

High Performance Storage is Critical in Checkpointing Process in AI Training

Checkpointing is a critical process in large-scale AI training, enabling models to periodically save and restore their state as training progresses. As model and dataset sizes expand into the billions of parameters and petabytes of data, this operation becomes increasingly demanding for storage infrastructure. Efficient checkpointing helps safeguard training progress against inevitable hardware failures and disruptions, while also allowing for fine-tuning, experimentation, and rapid recovery. However, frequent checkpointing can introduce performance overhead due to pauses in computation and intensive reads/writes to persistent storage, especially when distributed clusters grow to thousands of accelerators.

To address these challenges, modern AI storage architecture leverages strategies such as asynchronous checkpointing—where checkpoints are saved in the background, minimizing idle time—and hierarchical distribution, reducing bottlenecks by having leader nodes manage data transfers within clusters. The result is faster training throughput, lower risk of lost work, and more efficient use of compute resources. Optimizing for checkpoint size, frequency, and concurrent access patterns is vital to ensure high throughput and low latency, making high-performance scalable storage systems an indispensable foundation for reliable, cost-effective AI model training at scale. You can read more about it in this AWS article.

What Kind of Storage Is Needed for AI and HPC Workloads?

For AI and HPC workloads, the demands extend well beyond ordinary enterprise storage. Key requirements include:

• Parallel File Systems: Multiple servers and GPUs need to access datasets at the same time. Systems such as Lustre, WEKA, VAST Data, CephFS, and DDN Infinia enable concurrent access, avoiding bottlenecks and improving throughput for distributed workloads.
• High Throughput and Low Latency: Training GPT-like models or running simulations generates millions of read/write operations per second. Storage must deliver bandwidth in the tens to hundreds of GB/s and latency below 1ms, so that GPUs remain fed and productive.
• POSIX Compliance: Many AI frameworks and HPC applications expect a traditional POSIX interface for seamless operation.
• Scalability and Elasticity: Petabyte-scale capacity is the norm. Modern solutions allow you to scale horizontally, adding performance and capacity as demand grows.
• Data Integrity and Reliability: Enterprise-grade AI and HPC workloads need uninterrupted access to their data. Redundancy, fault tolerance, and robust disaster recovery features matter.

Typical Storage Specifications and Requirements

For modern AI Cloud or AI factory, and GPU Cloud infrastructure, expect:

• Bandwidth: 15–512 GB/s (or higher for top-tier solutions)
• IOPS: From 20,000 (entry) up to 800,000+
• Latency: Sub-1ms to 2ms for parallel file systems
• Capacity: 100TB to multi-petabyte scale, often with tiering to object storage
• Protocols: NFSv3/v4.1, SMB, Lustre, S3 (for hybrid and archival storage), HDFS, and native REST APIs

On-premises or hybrid deployments may include NVMe storage, CXL-enabled expansion, and advanced cooling for supporting high-density GPU clusters.

Source: snia.org - John Cardente Talk

Storage options for AI Cloud and HPC Workloads

To achieve next-generation AI and HPC results, enterprises and product teams should evaluate both commercial vendors and open source platforms.

Open Source Parallel File Systems

• Ceph (CephFS): Highly flexible, POSIX-compliant, scales from small clusters to exabytes. Used in academic and commercial AI labs for robust file and object storage. Many early stage AI factories are using solutions built on top of Ceph.
• Lustre / DDN Lustre: Optimized for large-scale HPC and AI workloads. Used in many supercomputing and enterprise environments.
• IBM Spectrum Scale (GPFS): High-performing parallel file system, widely used in science and industry.

Commercial AI and HPC Storage Solutions

• VAST Data: Delivers extreme performance for AI storage, marrying parallel file system performance with the economics of NAS and archive. Vast has been very popular and adapted by popular AI Cloud players like CoreWeave and Lambda.
• WEKA: Highly optimized metadata and file access for AI and multi-tenant clusters; helps overcome bottlenecks experienced in legacy systems. Similar to Vast, Weka has customers such as Yotta, Cohere, and Together.ai.
• DDN: Industry leader for research, hybrid file-object storage, and scalable data intelligence for model training and analytics. DDN’s solutions, like Infinia and xFusionAI, focus on both performance and efficiency for GPU workloads.
• Pure Storage, Cloudian, IBM, Dell: Also recognized for delivering enterprise-grade AI/HPC storage platforms.

Many solutions integrate natively with popular public clouds (AWS S3, Google Cloud Storage, Azure Blob)—enabling hybrid architectures and seamless data movement.

Product Examples and Use Cases

• Ceph (Open Source): Used by research labs and private cloud teams to build petabyte-scale, resilient storage for AI and HPC clusters.
• WEKA: Enterprise deployments often leverage WEKA for AI factories—a system with hundreds of GPUs running concurrent training jobs—thanks to its elastic scaling and metadata performance.
• VAST Data: Designed to deliver high throughput for both small and large file operations, increasingly chosen for generative AI workloads and data-intensive analytics in fintech, healthcare, and media.
• DDN: Supports hybrid deployment strategies; offers both parallel file system and object storage in a unified stack.

Parallel file systems such as Lustre and Spectrum Scale facilitate near-instant recovery, zero-data loss architectures, and compliance for regulated sectors.

Identifying the Best Storage for your needs

Because every cloud environment is unique, the first step in creating a distinctive solution is to establish a baseline through hardware benchmarking. MLCommons' benchmarking tools can be run directly on your hardware to gather reliable performance data.

The latest MLPerf Storage v2.0 benchmark results from MLCommons highlight the increasingly critical role of storage performance in the scalability of AI training systems. With participation nearly doubling compared to the previous v1.0 round, the industry’s rapid innovation is evident—storage solutions now support around twice the number of accelerators as before. The new iteration includes checkpointing benchmarks, which address real-world scenarios faced by large AI clusters, where frequent hardware failures can disrupt training jobs. By simulating such events and evaluating storage recovery speeds, MLPerf Storage v2.0 offers valuable insights into how checkpointing helps ensure uninterrupted performance in sprawling datacenter environments.

A broad spectrum of storage technologies took part in the benchmark—ranging from local storage, in-storage accelerators, to object stores—reflecting the diversity of approaches in AI infrastructure. Over 200 results were submitted by 26 organizations worldwide, many participating for the first time, which showcases the growing global momentum behind the MLPerf initiative. The benchmarking framework—open-source and rigorously peer-reviewed—provides unbiased, actionable data for system architects, datacenter managers, and software vendors. MLPerf Storage is a go-to resource for designing resilient, high-performance AI training systems in a rapidly evolving technology landscape.

Conclusion: Building Your AI Cloud and HPC Strategy

As the AI Cloud, GPU-as-a-service, and HPC landscape evolves, storage is no longer a background detail—it is the core differentiator for speed, scale, and future innovation. Vendor neutrality empowers you to architect best-of-breed systems, leveraging open-source foundations and integrating commercial solutions where they fit your needs. Every cloud or on-prem cluster will benefit from storage designed for AI and HPC, not just traditional workloads.

Ready for the next step? If you want to explore options, benchmark solutions, or design an optimized AI/HPC cloud, book a meeting with the CloudRaft team. Our experts bring hands-on experience from enterprise projects, migration strategies, and multi-vendor deployments, helping you maximize both infrastructure and business outcomes. Read more about our offering.