User guide

// Create the block device mapping to describe the root partition.

BlockDeviceMapping blockDeviceMapping = new BlockDeviceMapping();

blockDeviceMapping.setDeviceName("/dev/sda1");

40 // Set the delete on termination flag to false.

EbsBlockDevice ebs = new EbsBlockDevice();

ebs.setDeleteOnTermination(Boolean.FALSE);

blockDeviceMapping.setEbs(ebs);

45 // Add the block device mapping to the block list.

ArrayList<BlockDeviceMapping> blockList = new ArrayList<BlockDeviceMap

ping>();

blockList.add(blockDeviceMapping);

// Set the block device mapping configuration in the launch specifications.

50 launchSpecification.setBlockDeviceMappings(blockList);

// Add the launch specification.

requestRequest.setLaunchSpecification(launchSpecification);

55 // Call the RequestSpotInstance API.

RequestSpotInstancesResult requestResult = ec2.requestSpotInstances(re

questRequest);

Assuming you wanted to re-attach this volume to your instance on startup, you can also use the block

device mapping settings. Alternatively, if you attached a non-root partition, you can specify the Amazon

EBS volumes you want to attach to your Spot instance after it resumes.You do this simply by specifying

a snapshot ID in your EbsBlockDevice and alternative device name in your BlockDeviceMapping

objects. By leveraging block device mappings, it can be easier to bootstrap your instance.

Using the root partition to checkpoint your critical data is a great way to manage the potential for interruption

of your instances. For more methods on managing the potential of interruption, please visit the Managing

Interruption video.

How to Tag Your Spot Requests and Instances

Adding tags to EC2 resources can simplify the administration of your cloud infrastructure. A form of

metadata, tags can be used to create user-friendly names, enhance searchability, and improve coordination

between multiple users.You can also use tags to automate scripts and portions of your processes.

To add tags to your resources, you need to tag them after they have been requested. Specifically, you

must add a tag after a Spot request has been submitted or after the RunInstances call has been

performed. The following code example illustrates adding tags.

served.

5 * Licensed under the Apache License, Version 2.0 (the "License").

* You may not use this file except in compliance with the License.

* A copy of the License is located at

* http://aws.amazon.com/apache2.0

10 *

Version v1.0.0

AWS SDK for Java Developer Guide

Tutorial: Advanced Amazon EC2 Spot Request

Management