Understand the difference between Block Storage volumes
This page provides information about the differences between Block Storage legacy, Block Storage 5K IOPS, and Block Storage 15K IOPS volumes.
Refer to the dedicated documentation to learn about the differences between Block Storage and Local Storage volumes.
Block Storage volume types overview
| Volume type | IOPS | Underlying hardware | Latency | Max volume size | Recommended use cases | Availability & resilience |
|---|---|---|---|---|---|---|
b_ssd (Block Storage legacy) | 5,000 | Legacy SSDs | High | Up to 10 TB | General-purpose workloads that do not demand high IOPS or | Data is replicated three times across multiple disks for high availability and integrity |
sbs_5k (Block 5K) | 5,000 | Modern NVMe disks | Low | 5 GB to 10 TB | Development environments, web servers, and applications needing consistent performance | 99.99% SLA, triple-replicated data to safeguard against hardware failures |
sbs_15k (Block 15K) | 15,000 | Modern NVMe disks | Very low | 5 GB to 10 TB | High-performance databases, transactional applications, and I/O-intensive workloads | 99.99% SLA, triple-replicated data to safeguard against hardware failures |
Block Storage 5K and Block Storage legacy comparison
| Block Storage legacy volumes | Block Storage 5K IOPS volumes | |
|---|---|---|
| Underlying hardware | Built using older-generation SSDs. 5K IOPS split between read and write (total 10K IOPS). | Powered by modern NVMe disks. NVMe provides better performance and is optimized for high-speed operations. |
| Performance | Limited by older SSD hardware, slower data access, higher latency. | Better performance with NVMe disks, 5K IOPS for both read and write combined, faster and more efficient. |
| Latency | Higher latency due to older SSDs, slower application response times. | Lower latency, faster access times, ideal for quick data retrieval, smoother experience with NVMe. |
Summary
- Block Storage legacy volumes rely on older, slower SSD technology, leading to higher latency and lower overall performance.
- Block Storage 5K IOPS volumes use advanced NVMe disks, offering improved performance, lower latency, and faster data access.
For tasks where performance and low latency are crucial, Block Storage 5K and 15K IOPS volumes provide a more effective solution due to the modern hardware and technological improvements.
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