Beyond RAID 10

Abstract

Traditional RAID 10 has long been a preferred way to balance storage performance and redundancy. But it costs half your flash, struggles with write-intensive workloads and wears SSDs faster. This white paper introduces the Host-based Flash Translation Layer (Host FTL). Using the host CPU and memory, Host FTL combines data compression, sequential write linearization and wear management to improve performance, increase usable storage and extend SSD lifespan. Compared with RAID 10, it lowers total cost of ownership (TCO) in demanding workloads such as databases, virtualized environments, AI/ML and analytics. maxRAID from WildFire Storage is our implementation of Host FTL.

Overview: breaking down the barriers of traditional RAID

For organizations seeking reliable RAID 10 alternatives, RAID 10 has long been the go-to solution for balancing data redundancy and storage performance. By combining striping speed with mirroring protection, RAID 10 delivers quick read/write operations while safeguarding data. However, these benefits come at a high cost. RAID 10 effectively doubles the required storage capacity for redundancy, reducing usable space and inflating expenses. Additionally, RAID 10 struggles with write-intensive workloads and accelerates wear on SSDs, leading to frequent maintenance and higher costs.

This white paper introduces the Host-based Flash Translation Layer (Host FTL). Host FTL addresses the limitations of RAID 10 by moving key data management functions from the SSD hardware to the host system, improving performance, increasing capacity, extending SSD lifespan and lowering total cost of ownership (TCO). It explains how Host FTL works, compares it with RAID 10, and presents benchmark results.

RAID 10 and its limitations: why the old guard is falling short

RAID 10 is valued for its balance of speed and redundancy. By striping data across multiple drives (RAID 0) and mirroring it for backup (RAID 1), RAID 10 provides quick access and recovery. However, these advantages come with considerable trade-offs:

1. High Storage Costs

RAID 10 requires twice the storage capacity to mirror data. For every 1TB of usable storage, an additional 1TB is needed for redundancy, effectively halving the available storage and doubling the cost. This makes RAID 10 an expensive option, mainly as storage demands grow.

2. Limited Performance in Write-Intensive Workloads:

The internal Flash Translation Layers (FTLs) within SSDs are designed primarily for sequential read/write operations. RAID 10, while efficient in sequential tasks, faces bottlenecks in handling the random write patterns common in modern applications like databases and virtual machines. This inefficiency slows application performance and fails to leverage SSDs’ full potential.

3. Increased Wear and Tear:

RAID 10’s mirroring process results in higher write amplification, accelerating the wear on SSDs. The more data that is written and mirrored, the quicker SSDs degrade. This leads to frequent replacements, increased maintenance, and added costs.

Host FTL: an alternative to RAID 10

Host FTL is a host-based Flash Translation Layer that manages data before it reaches the RAID layer or the SSDs. Using the host system’s CPU and memory, it enables capabilities not found in traditional RAID setups.

What Makes Host FTL Different?

1. Data Compression:

Host FTL compresses data before writing it to the SSDs, reducing stored data and minimizing write amplification. This efficient use of space directly addresses the storage overhead associated with RAID 10, providing more usable storage capacity while extending SSD lifespan.

2. Sequential Write Linearization:

SSDs operate best with sequential writes. Host FTL reorganizes random writes into large, sequential patterns, significantly improving performance and reducing latency. This reorganization is vital for environments with high random I/O operations, like databases, virtualized servers, and AI/ML workloads, where traditional RAID 10 struggles.

Host FTL: the RAID 10 alternative key benefits

By moving beyond the limitations of RAID 10, Host FTL provides a host of benefits that redefine storage performance and efficiency:

1. Maximizing Usable Storage Capacity

Unlike RAID 10, which doubles the flash you buy, Host FTL lets enterprises recover a considerable portion of their storage capacity through parity protection and compression.

Host FTL optimizes RAID configurations like RAID-5 and RAID-6, offering significantly improved efficiency without the usual performance trade-offs. This allows businesses to recover a considerable portion of their storage capacity, reducing RAID 10’s high overhead. While the increase in usable capacity is substantial—though not quite double—Host FTL also introduces opportunities for data compression, potentially exceeding a twofold increase in storage efficiency. Enterprises can maximize their storage investments by leveraging these capabilities while ensuring data redundancy.

2. Superior Performance in Write-Heavy Environments:

Host FTL converts random writes into sequential ones, enabling SSDs to operate efficiently — which makes it well suited to AI, databases and virtualized environments.

3. Extended SSD Lifespan:

Host FTL reduces write amplification by compressing data, linearizing writes, and distributing them evenly across the SSD array. Unlike RAID 10, which accelerates SSD wear due to excessive mirroring, Host FTL’s efficient management prolongs the life of SSDs, reducing the need for frequent replacements and providing a better return on investment.

4. Lower Total Cost of Ownership (TCO)

Host FTL’s added capacity, performance and longer SSD life lower TCO compared with RAID 10. Fewer drives means less hardware, installation and maintenance cost, and longer SSD life means fewer replacements. In the 200 TB database example, with data that compresses by 50%, maxRAID‑5 needs 6 drives where RAID 10 needs 14, and no drive replacements within five years.

With fewer drives to buy and replace, Host FTL is a practical RAID 10 alternative for businesses focused on long-term cost.

5. Flexible Data Protection:

Host FTL offers software-based redundancy schemes that adapt to various storage configurations. This flexibility ensures data protection without the performance penalties associated with traditional RAID 10 mirroring. Host FTL’s intelligent redundancy and data management make it possible to safeguard information while optimizing speed and efficiency.

Performance testing: Host FTL vs RAID 10

We benchmarked Host FTL against RAID 10 in environments simulating real-world workloads, including write-intensive and mixed I/O scenarios.

All results below were measured on the same system: six 3.75 TB NVMe SSDs, 4K blocks.

1. Mixed Read/Write Workloads

With 70% reads and 30% writes — typical of databases and virtualized servers — maxRAID‑6, with double parity, delivered more throughput than RAID 10. Traditional RAID‑5 collapsed under the parity penalty.

Mixed workload: 70% reads, 30% writes	Throughput
RAID 5	0.1 GB/s
RAID 10	8.1 GB/s
maxRAID‑6	10.4 GB/s (3.1 million IOPS)

2. Write-Intensive Workloads

With 100% random writes, maxRAID‑5 sustained 3.2 million IOPS, compared with 1.0 million for RAID 10, because every write reaches the SSDs as part of a full, sequential stripe. RAID 10, by contrast, doubles every write through mirroring.

100% random writes	IOPS
RAID 5	42K
RAID 10	1.0 million
maxRAID‑5	3.2 million

3. Usable Storage Capacity

With six 3.84 TB drives, RAID 10 gives you 11.5 TB of usable storage. Host FTL with RAID‑5 gives you 19.2 TB — and 27.0 TB with data that compresses 1.4 : 1. More data in the same physical space means fewer drives to buy.

Six 3.84 TB SSDs	Usable storage
RAID 10	11.5 TB
Host FTL, RAID‑5, no compression	19.2 TB
Host FTL, RAID‑5, 1.4 : 1 compression	27.0 TB

When to choose Host FTL: tailoring solutions for real-world applications

Host FTL is more than an improvement over RAID 10; it is a storage management layer designed for today’s data environments. Here is how it applies to specific real-world workloads.

1. High-Performance Databases:

Modern databases, especially those that support Online Transaction Processing (OLTP) systems, generate a high volume of random read and write operations. Traditional RAID 10 setups are often bogged down by the fragmented, scattered nature of these I/O patterns, resulting in increased latency and slowed transaction processing. Host FTL addresses this by linearizing these random writes into sequential ones before they hit the storage array, significantly reducing latency and accelerating throughput. Furthermore, Host FTL’s real-time compression reduces the data footprint, enabling databases to handle more transactions with the same storage capacity. The benefits are twofold: a boost in performance and a reduction in the physical hardware needed, leading to cost savings. This combination makes Host FTL particularly valuable in environments where speed, reliability, and data integrity are paramount, such as financial institutions, e-commerce platforms, and large-scale enterprise resource planning (ERP) systems.

2. Virtualized Environments:

Virtualized environments, including those running on VMware, Hyper-V, or KVM, host multiple virtual machines (VMs) on a single physical server. Each VM produces a variety of I/O patterns, resulting in a complex and mixed I/O workload. Traditional RAID 10 configurations struggle to manage these simultaneous, unpredictable requests, often leading to performance bottlenecks as the density of VMs increases. Host FTL overcomes this challenge by reorganizing these varied I/O patterns into sequential, SSD-friendly writes, minimizing internal fragmentation and optimizing throughput. Additionally, Host FTL’s advanced block management intelligently allocates storage resources, ensuring that each VM receives fast and reliable access to data. This capability improves the overall system responsiveness and allows for higher VM density per host. By reducing latency and maximizing I/O efficiency, Host FTL enables virtualized environments to scale effectively, improving resource utilization and reducing operational costs.

3. Artificial Intelligence (AI) and Machine Learning (ML) Workloads:

AI and ML workloads are characterized by their need for rapid data processing and large-scale data movement, often requiring high-speed access to vast datasets. The efficiency of these workloads heavily depends on the ability of the underlying storage system to feed data to the GPUs without delay. Traditional RAID 10 configurations can lead to GPU data starvation due to the slow processing of random write patterns and the high overhead of data mirroring. Host FTL eliminates this bottleneck by linearizing writes, compressing data in real-time, and managing data blocks to ensure timely delivery. This efficient data flow maximizes GPU utilization, significantly reducing training and inference times. The result is a more productive AI pipeline, allowing enterprises to gain insights faster and derive greater value from their AI investments. Host FTL directly improves the return on investment (ROI) for AI/ML infrastructure by minimizing idle GPU time and maximizing throughput.

4. Big Data Analytics:

Big data applications, such as data mining, real-time analytics, and machine learning model training, involve processing vast amounts of data from various sources. These workloads often generate a mix of sequential and random I/O operations, creating challenges for traditional RAID 10 configurations. RAID 10’s inherent limitations in handling random writes and its static data management approach can lead to fragmentation, increased latency, and reduced throughput. Host FTL, on the other hand, excels in these scenarios by compressing large datasets in real-time and converting random writes into sequential ones. This accelerates data access and reduces write amplification, extending the lifespan of the SSDs within the storage array. Host FTL’s dynamic block management ensures that storage resources are used efficiently, facilitating quick data retrieval and processing. As a result, organizations can analyze data more rapidly, derive insights faster, and make more informed, data-driven decisions. The enhanced storage performance provided by Host FTL is a critical enabler for big data environments, allowing them to operate at their full potential without being hindered by storage bottlenecks.

5. Cloud Services and Multi-Tenant Environments:

In cloud environments, storage performance directly impacts the quality and responsiveness of a wide range of services, from web hosting to SaaS applications. Cloud providers manage large-scale, multi-tenant infrastructures where different clients have diverse and often unpredictable storage requirements. This complexity creates a challenging I/O landscape featuring mixed read-heavy, write-intensive, and random-access patterns. RAID 10 configurations, with their static data management and high overhead, often struggle to handle such diverse workloads efficiently. Host FTL offers a dynamic solution by intercepting and reorganizing data flows before they reach the SSDs. This ensures that each client’s data is stored efficiently, significantly improving overall storage performance and system responsiveness. By maximizing available storage capacity and reducing write amplification, Host FTL allows cloud providers to manage operational costs more effectively, resulting in competitive pricing and enhanced service quality for their clients. Additionally, the advanced wear levelling and data protection features of Host FTL ensure that cloud environments remain robust and reliable, reducing the risk of data loss and costly downtimes.

Why Host FTL is the strategic choice

Host FTL provides a strategic advantage in each scenario by offering enhanced performance, extended SSD lifespan, and reduced long-term costs. By dynamically adapting to the specific requirements of different workloads, Host FTL creates a more intelligent and responsive storage environment that traditional RAID 10 does not offer: a path to faster, more reliable and more cost-effective storage.

Key Takeaway:

Host FTL is a practical alternative to RAID 10. It optimizes data flow, reduces storage costs and improves responsiveness — a strong fit for enterprises that want more from their storage infrastructure.

Conclusion: the future is Host FTL

Host FTL overcomes RAID 10’s inherent limitations with a different approach to data handling. It improves performance, increases usable storage, extends SSD lifespan and lowers total cost.

By linearizing writes, reducing write amplification and adapting to varying storage needs, Host FTL offers a practical path beyond RAID 10 for high-performance storage.

With reduced hardware requirements and extended drive life, Host FTL enables organizations to cut costs, making it an ideal RAID 10 alternative for businesses focused on long-term savings.

To learn more about maxRAID look at our White Paper titled “How maxRAID Works”

WildFire Storage: Leading the Charge with maxRAID Host FTL

WildFire Storage builds maxRAID, our Host FTL technology, into its product line. We also license maxRAID to enterprises, hosting providers, storage vendors and disk manufacturers.

Our data management technology is designed for the demands of high-performance computing, virtualization, AI/ML workloads and cloud environments. With maxRAID, WildFire Storage builds flash-based storage that does more with fewer drives.