Release notes for PSL4

Overview

PSL4 is a storage type in PolarDB that uses Alibaba's technology to compress and decompress data at the physical SSD level, minimizing storage costs.

Release date

August 27, 2022

Pricing

Benefits

• AliFlash technology compresses and decompresses data at the physical SSD level, lowering storage costs while maintaining high disk performance.

• FPGA or ASIC chips compress data, reducing write volume and saving storage space. The resulting free space decreases write amplification on standard SSDs and improves disk performance.

• Data compression reduces physical flash memory accesses and improves data access performance. When the access savings outweigh compression and decompression overhead, overall disk performance improves.

• Smart-SSDs are compatible with standard disk interfaces, transparent to applications with no adaptation required.

Scenarios

Workloads that prioritize cost-effectiveness.

References