PERF03-05 Selecting Appropriate Storage Services
- Risk level
Medium
- Key strategies
During architecture design, select an appropriate storage service based on service scenarios and data characteristics. There are three types of storage available for you to choose from: Elastic Volume Service (EVS), Scalable File Service (SFS), and Object Storage Service (OBS). Their differences are described in the following table.
Dimension
SFS
OBS
EVS
Concept
Provides on-demand high-performance file storage, which can be shared by multiple cloud servers. It is similar to a remote directory for Windows or Linux OSs.
Provides massive, secure, reliable, and cost-effective data storage for users to store data of any type and size.
Provides scalable, high-performance, high-reliability, block storage that can be used to meet a wide variety of service requirements. An EVS disk is similar to a hard disk on a PC.
Data storage logic
Stores files. Data is sorted and displayed in files and folders.
Stores objects. Files are saved directly to OBS. The files automatically generate corresponding system metadata. You can also customize the metadata if needed.
Stores binary data and cannot directly store files. To store files, you need to format the disk with a file system first.
Access method
SFS file systems need to be mounted to ECSs or BMSs through the Network File System (NFS) or Common Internet File System (CIFS) protocol before they can be accessed. A network address must be specified or mapped to a local directory for access.
Accessible through the Internet or Direct Connect. The bucket address must be specified for access, and transfer protocols HTTP and HTTPS are used.
EVS disks can only be used and accessed from applications after being attached to ECSs or BMSs and initialized.
Scenario
High-performance computing (HPC), media processing, file sharing, content management, and web services
Note:HPC: High bandwidth is required for shared file storage, such as gene sequencing and image rendering.
Big data analytics, static website hosting, online video on demand (VoD), gene sequencing, and intelligent video surveillance
HPC, enterprise core cluster applications, enterprise application systems, and development and testing
Note:HPC: High-speed and high-IOPS storage is required, such as industrial design and energy exploration.
Capacity
PiB-level
EiB-level
TiB-level
Latency
3–10 ms
10 ms
Sub-milliseconds
IOPS/TPS
10,000 per file system
Tens of millions
128,000 for a single disk
Bandwidth
GiB/s
TiB/s
MiB/s
Data sharing
Yes
Yes
Yes
Remote access
Yes
Yes
No
Used independently
Yes
Yes
No
Hyperlink
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot
