What is the background of the emergence of ZNS? The principle of ZNS SSD is to divide the namespace space into multiple zone spaces, and perform sequential reading and writing inside the zone space.
In the ZNS scenario, different applications store business data accordingly according to the Zone configuration information. Since the Host manages the placement and access location of data, it willminimize GC garbage collection, reduce write amplification inside the SSD, and increase the life of the SSD.
Reduce the DRAM space of SSD and remove OP redundant space to increase the capacity available to users.
Back to our core question today:Why is QLC NAND the biggest winner of ZNS SSD? What are the benefits of combining QLC NAND and ZNS?
-
Cost Effectiveness: QLC NAND, which offers higher storage density and lower cost than TLC. In ZNS devices, because their designs favor sequential writes, the high-density nature of QLC NAND can be better exploited, providing a higher-capacity, more cost-effective solution< /span>.
-
Improved durability:The ZNS design helps extend the life of QLC NAND. Traditional SSDs require frequent garbage collection operations to manage erased and unused space. However, ZNS SSD allows for more efficient data management and erasure strategies, reducing unnecessary read/write operations, thereby reducing wear and tear on the flash memory cells.
-
Performance Optimization: Since the ZNS design encourages sequential writes, it can effectively avoid excessive random writes on QLC NAND Enter. This helps reduce write amplification effects, improve write performance, and reduce latency.
-
Easy to manage: ZNS provides a more structured way of organizing data, making it easier for firmware and host systems to track and manage data. This simplification is particularly useful for QLC NAND, which is typically slower to program and erase and has a higher bit error rate.
-
Future Trend: With the advancement of technology, QLC NAND has become the mainstream choice for large-capacity storage devices. As a new storage interface specification, ZNS technology is gradually being accepted by the industry and used in data centers and enterprise-level applications. By combining the two technologies, manufacturers canoffer products with greater capacity and better price/performance ratio to meet growing data storage needs.