Create a DSW spot instance

Usage notes

Pay-as-you-go instances in a DSW public resource group can be purchased as spot instances. Spot instances provide the same features and performance as regular instances, with per-minute billing and the following characteristics:

• Dynamic pricing: Prices fluctuate in real time based on supply and demand but never exceed the pay-as-you-go price for the same instance type, saving up to 90% on costs.

• Interruption mechanism: If the market price exceeds your specified maximum price, the instance is interrupted and reclaimed. Save intermediate data regularly to avoid data loss.

Billing

Notes

• If the spot instance option is unavailable after you select an instance type, no spot inventory is available for that type.

• Spot instances are not eligible for savings plan deductions.

• If you have a DSW resource plan (free or paid) and select an instance type eligible for the plan, the resource plan deduction is based on the original price, regardless of the spot instance transaction price. Therefore, do not use spot instances if you have a resource plan.

• Market prices for the same instance type can vary across zones. If you specify a vSwitch, do not bid lower than the minimum price in the zone where the vSwitch is located. Otherwise, the purchase may fail.

  For example, if you purchase the following instance type as a spot instance and configure a vSwitch in Shenzhen Zone E, your purchase request is likely to fail if your bid is lower than CNY 11.712.

  

Procedure

1. Go to the DSW page.

   1. Log on to the PAI console.

   2. On the Overview page, select the destination region.

   3. In the navigation pane on the left, click Workspaces. On the Workspace List page, click the name of the workspace you want to manage.

   4. In the navigation pane on the left of the workspace, choose Model Development and Training > Data Science Workshop (DSW).

2. Click Create Instance and configure the following key parameters. For more information about other parameter settings, see Create a DSW instance.

   Parameter	Description
   Resource Type	Select Public Resources.
   Bidding Purchase	Enable the Bidding Purchase switch.
   Instance Usage Duration	Select one of the following options: 1-Hour Usage: After the instance starts, it runs for the set time without release. After the set time, inventory and bids are checked every 5 minutes to determine whether the instance can continue. No Specified Usage Duration: Do not set a resource usage duration. This option provides better cost savings compared to setting a specific duration.
   Maximum Instance Price	Select one of the following options: Use Automatic Bid: The system automatically bids at the real-time market price. When inventory is sufficient, the system bids at the current market price, with the pay-as-you-go price as the upper limit. When inventory is insufficient, the instance is automatically released. Set Maximum Price: Specify an acceptable maximum price. If the maximum price is greater than or equal to the market price and inventory is sufficient, the spot instance is purchased and runs. You are billed at the current market price. If the maximum price is less than the market price or inventory is insufficient, the order fails and the instance is automatically released. Pay attention to historical price trends when placing a bid. Note Consider market price fluctuations and set a reasonable bidding policy to increase the success rate of instance creation and reduce the risk of resource reclamation.

3. After confirming the configuration, click OK.

Data and environment protection

Like regular pay-as-you-go instances, each spot instance includes a free 100 GiB system disk. If a spot instance is released due to a market price increase, your environment configuration and data on the system disk are retained. You can recover this data the next time you start the instance.

However, running processes cannot be recovered. Save intermediate data regularly when using a spot instance to prevent data loss.