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For details, see Backing Up EVS Disks and Creating an EVS Snapshot respectively. You have logged in to the server. For how to log in to an ECS, see Logging In to an ECS. For how to log in to a BMS, see Logging In to a BMS.
API Types/Versions/Microversions API Type Description EVS APIs are classified as follows: APIs for EVS with customized specifications, which are also referred to as custom APIs Native OpenStack APIs that comply with OpenStack community specifications, which are also referred to as
You can use the following methods to improve your disk performance: RAID Array Creation with EVS Disks Using LVM to Manage EVS Disks Parent topic: Performance
For details, see Backing Up EVS Disks and Creating an EVS Snapshot respectively. You have logged in to the server. For how to log in to an ECS, see Logging In to an ECS. For how to log in to a BMS, see Logging In to a BMS.
SDK Overview This document lists the SDK versions provided by Elastic Volume Service (EVS) and the addresses for obtaining the latest SDK versions. SDK List Table 1 lists the SDKs supported by EVS.
Before an EVS disk is attached, the system will call the reserveVolume EVS API to check whether the disk can be attached. If it can be attached, the system then changes the disk status to attaching to avoid conflicts with other operations. Parent topic: General
Setting an Alarm Rule Scenarios You can set alarm rules for EVS to customize the monitoring scope and notification policies and stay aware of the EVS disk statuses.
Constraints The number of EVS resources that you can create is determined by your quota. To view or increase the quotas, see Querying EVS Resource Quotas. For detailed constraints, see the constraints described in specific APIs. Parent Topic: Before You Start
Multiple servers can access the same shared EVS disk at the same time. A shared EVS disk can be attached to a maximum of 16 servers, including ECSs or BMSs.
Currently, the capacity of an EVS disk cannot be transferred to another disk. Multiple EVS disks cannot be combined into a single, larger disk, either. Common Scenarios You want to expand the system disk capacity, but purchased a new data disk.
Will My EVS Disk Be Unsubscribed from or Deleted When I Unsubscribe from or Delete Its Server? For pay-per-use disks: If such disks are separately purchased and are attached, the system will prompt you whether to delete them when you delete the server.
Fault Recovery EVS offers a variety of fault recovery methods. For details, Table 1. Table 1 Fault recovery Method Description Reference EVS backup CBR provides the cloud disk backup function, which allows you to back up EVS disks while the servers are running.
Identity Authentication and Access Control You can access EVS through the EVS console, APIs, or SDKs. No matter which method you choose, you actually use REST APIs to access EVS. EVS APIs support only authenticated requests.
Why Do Some of My EVS Disks Not Have WWN Information? How Can I Migrate Data from an EVS Disk? What Are the Differences Between System Disks and Data Disks? How Can I Upload Files to My EVS Disk? Billing Will I Be Billed If I Have Purchased an EVS Disk But Not Used It?
An EVS system disk can be as large as 1 TiB (1,024 GiB). You can expand the capacity of a system disk to up to 1 TiB. An EVS data disk can be as large as 32 TiB (32,768 GiB).
Commercial use General Purpose SSD EVS Disks March 2019 No. Feature Description Phase Document 1 EVS disk monitoring is supported. You can view monitored EVS disks.
Commercial use General Purpose SSD EVS Disks March 2019 No. Feature Description Phase Document 1 EVS disk monitoring is supported. You can view monitored EVS disks.
EVS
For the endpoint of the EVS service, see Regions and Endpoints. Parent Topic: Before You Start
Figure 3 Data rebuild principle What Are the Differences Between Three-Copy Redundancy, EVS Snapshots, and EVS Backups? Three-copy redundancy improves the reliability of the data stored on EVS disks.
