- Service Overview
- Getting Started
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User Guide
- Using IAM to Grant Access to FlexusX
- Purchasing a FlexusX Instance
- Logging In to a FlexusX Instance
- Managing FlexusX Instances
- Managing Images
- Managing EVS Disks
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VPC Management
- VPC Overview
- Attaching Extension Network Interfaces to a FlexusX Instance
- Detaching Extension Network Interfaces from a FlexusX Instance
- Changing the VPC for a FlexusX Instance
- Changing the Private IP Address of the Primary Network Interface for a FlexusX Instance
- Configuring a Virtual IP Address for a FlexusX Instance
- Managing EIPs
- Managing Server Security
- Managing Backups
- Viewing Monitoring Metrics and Configuring Alarms
- API Reference
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FAQs
- Product Consulting
- Billing
- OS and Image
- Specification Modification FAQ
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Performance Mode
- How Do I Know Whether Performance Mode Is Enabled for a FlexusX Instance?
- How Much Can Performance Be Improved If Performance Mode Is Enabled for a Flexus X Instance?
- Do I Need to Stop My FlexusX Instance If I Want to Enable or Disable Performance Mode for It?
- Can I Enable Performance Mode After a FlexusX Instance Is Created?
- Will I Continue to Be Billed If I Disable Performance Mode for My FlexusX Instance?
- Password
- General Reference
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Overview
Elastic Volume Service (EVS) provides scalable block storage for FlexusX instances. With high reliability, high performance, and varied specifications, EVS disks can be used for distributed file systems, development and testing environments, data warehouses, and high-performance computing (HPC) scenarios to meet diverse service requirements.
System and data disks of FlexusX instances support the following EVS disk types: common I/O, high I/O, General Purpose SSD, ultra-high I/O, and General Purpose SSD V2. By default, a FlexusX instance has a system disk attached. You can configure the type and capacity of the system and data disks based on service requirements. For more information about EVS disk performance, see Disk Types and Performance.
Billing
EVS disks are billed based on the disk type, size, and usage duration on a yearly/monthly or pay-per-use basis. For details about EVS billing, see Billing for EVS Disks.
Constraints
- When you purchase a FlexusX instance, the EVS disk device type is VBD by default and cannot be changed. After purchasing a FlexusX instance, you can add SCSI data disks.
- When you purchase a FlexusX instance, you can add a maximum of 24 disks (1 system disk and 23 data disks). After purchasing a FlexusX instance, you can add a maximum of 60 disks.
If more data disks are required, attach them after purchasing a FlexusX instance. To query the number of disks that can be attached to FlexusX instances of different specifications, see Querying Information About Disks Attached to an ECS.
- After a new data disk is attached to a FlexusX instance, you need to initialize the data disk before using it.
For details about EVS constraints, see EVS Notes and Constraints.
Related Operations
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After a FlexusX instance is created, if the EVS disks on the instance cannot meet service requirements, you can attach existing disks to the FlexusX instance. |
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If the disk capacity of your FlexusX instance is not enough, you can expand the capacity. |
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Data disks must be initialized before they can be used, regardless of whether they are created together with FlexusX instances or created separately and attached to the FlexusX instances. An initialized data disk does not need to be initialized again.
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