Disk Types
Huawei Cloud provides various storage products for your BMSs, including block storage based on the distributed storage architecture, dedicated storage based on enterprise storage architecture, and local disks.
- Block storage refers to EVS disks, which are block-based storage products and adopt a three-copy distributed mechanism. EVS disks provide high reliability, performance, and scalability. You can create or release them at any time.
- Dedicated Distributed Storage Service (DSS) provides dedicated physical storage resources and adopts a three-copy distributed mechanism similar to block storage. It provides high availability and durability, and stable and low latency using multiple technologies, such as data redundancy and cache acceleration.
- Local disks include NVMe SSDs, SATA disks, and others. They provide a low latency, high throughput, and high cost-effectiveness and are applicable to scenarios that have large volumes of data and require high storage I/O performance and real-time performance.
Because local disks of a single physical server may encounter a single point of failure (SPOF), you are advised to configure data redundancy at the application layer to ensure data availability.
Storage Product |
Storage Type |
Typical Application Scenarios |
Process |
---|---|---|---|
Block storage |
Shared storage pools |
|
Create a disk and then attach the disk to the BMS. |
DSS |
Physically isolated storage pools and dedicated resources |
|
DSS can be used with BMSs in DeCs or those not in DeCs.
|
Local disks |
Local disks of servers |
|
Create a BMS and use its local disks directly. |
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