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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: wangdengke2 <wangdengke2@huawei.com>
Co-committed-by: wangdengke2 <wangdengke2@huawei.com>
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DB Instance Storage Types

The database system is generally an important part of an IT system and has high requirements on storage I/O performance. You can select a storage type based on service demands. You cannot change the storage type after the DB instance is created.

Description

RDS supports Cloud SSD and Extreme SSD to suit different performance requirements of your workloads.

  • Cloud SSD

    Stores data in cloud disks for decoupled storage and compute. The maximum throughput is 350 MB/s.

  • Extreme SSD

    Uses 25GE network and RDMA technologies to provide you with up to 1,000 MB/s throughput per disk and sub-millisecond latency.

Performance Comparison

Table 1 Performance comparison

Item

Cloud SSD

Extreme SSD

I/O performance

Subpar I/O performance due to additional network I/O overheads

Higher I/O performance than cloud SSDs

Elastic scalability

Scaling in seconds

Scaling in seconds

Maximum IOPS

50,000

128,000

Maximum throughput

350 MiB/s

For specifications with more than 32 vCPUs, the maximum throughput is 1,000 MiB/s.

For specifications with 32 vCPUs or fewer, the maximum throughput may not reach 1,000 MiB/s due to the underlying architecture.

Read/write latency

Medium

Medium
Parent topic: DB Instance Description