Dynamically Expanding EVS Disk Capacity

Overview

If a notebook instance uses an EVS disk for storage, the disk is mounted to /home/ma-user/work/ of the notebook container and the disk capacity can be expanded by up to 100 GB at a time when the instance is running.

Application Scenarios

During notebook development, select a small EVS disk capacity, for example, 5 GB, when creating a notebook instance because the storage requirements are low at the initial stage. After the development, a large volume of data must be trained. Then, expand the disk capacity to cost-effectively meet your service needs.

Restrictions

• The target notebook instance must use EVS for storage.
  Figure 1 Selecting EVS when creating a notebook instance
  
• Up to 100 GB can be expanded at a time. Additionally, the total capacity after expansion cannot exceed 4096 GB.
• If the original capacity of an EVS disk is 4096 GB, the disk capacity cannot be expanded.
• After the instance is stopped, the expanded capacity still takes effect. The billing is based on the expanded EVS disk capacity.
• An EVS disk is billed as long as it is used. To stop billing an EVS disk, delete data from the EVS disk and release the disk.

Procedure

1. Log in to the ModelArts management console. In the left navigation pane, choose Development Workspace > Notebook.
2. Click the name of a running notebook instance. On the instance details page, click Expansion.
   Figure 2 Instance details page
   
3. Set the capacity to be expanded and click OK. Expanding shows that the capacity expansion is in progress. After the expansion, the displayed storage capacity is the expanded capacity.
   Figure 3 Capacity expansion
   
   Figure 4 Expanding