{"id":6636,"date":"2022-06-27T09:52:00","date_gmt":"2022-06-27T13:52:00","guid":{"rendered":"https:\/\/www.redline13.com\/blog\/?p=6636"},"modified":"2022-06-28T12:12:14","modified_gmt":"2022-06-28T16:12:14","slug":"load-testing-with-aws-spot-vs-on-demand-instances","status":"publish","type":"post","link":"https:\/\/www.redline13.com\/blog\/2022\/06\/load-testing-with-aws-spot-vs-on-demand-instances\/","title":{"rendered":"Load Testing with AWS Spot vs On-Demand Instances &#8211; Spot Instances save you money"},"content":{"rendered":"\n<p>Many companies are struggling with the need for comprehensive load testing, the cost of load testing and limited budgets. This post will tell you about something you may not have considered: Load Testing with AWS Spot vs On-Demand Instances.<\/p>\n\n\n\n<p>To begin with, RedLine13 understands the high cost of load testing. If you don&#8217;t know the RedLine13 <a href=\"https:\/\/www.redline13.com\/blog\/about-redline13\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"story (opens in a new tab)\">story<\/a>, that&#8217;s what led us to create RedLine13 for our own testing.<\/p>\n\n\n\n<p>There are many different types of load testing that you may need to do, which just increases the demands. For those relatively new to load testing, this tutorial by Guru99 is full of good information on the many types: <a rel=\"noreferrer noopener\" aria-label=\"Performance Testing Tutorial: What is, Types, Metrics &amp; Example (opens in a new tab)\" href=\"https:\/\/www.guru99.com\/performance-testing.html\" target=\"_blank\">Performance Testing Tutorial: What is, Types, Metrics &amp; Example.<\/a><\/p>\n\n\n\n<p>The cost of load testing is what leads many companies to RedLine13 and significant savings. But there are savings being left on the table, even by RedLine13 customers. The reason is the choice of AWS instances being used for load testing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">AWS Spot Instances<\/h3>\n\n\n\n<p>If you only use AWS On-Demand Instances and don&#8217;t use AWS Spot Instances, then this is something to consider for saving more money when load testing. When deciding between AWS Spot vs On-Demand Instances you first need to understand about AWS Spot instances.<\/p>\n\n\n\n<p>From the <a href=\"https:\/\/docs.aws.amazon.com\/AWSEC2\/latest\/UserGuide\/using-spot-instances.html\">AWS<\/a> website:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>A Spot Instance is an unused EC2 instance that is available for less than the On-Demand price. Because Spot Instances enable you to request unused EC2 instances at steep discounts, you can lower your Amazon EC2 costs significantly.<\/p><\/blockquote>\n\n\n\n<p>Are there any negatives to Spot Instances? <a href=\"https:\/\/docs.aws.amazon.com\/AWSEC2\/latest\/UserGuide\/using-spot-instances.html\">AWS<\/a> says:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Spot Instances are a cost-effective choice if you can be flexible about when your applications run and if your applications can be interrupted.&nbsp;<\/p><\/blockquote>\n\n\n\n<p><a href=\"https:\/\/aws.amazon.com\/ec2\/spot\/?sc_icampaign=Adoption_Campaign_pac-edm-2019-ec2-site_merch-adoption-1-2ups&amp;sc_ichannel=ha&amp;sc_icontent=awssm-1847&amp;sc_ioutcome=Enterprise_Digital_Marketing&amp;sc_iplace=docs-bottom&amp;trk=ha_a131L000005uEkWQAU~ha_awssm-1847~ha_awssm-1847&amp;trkCampaign=pac_ec2spot_webpage_product-page\">AWS<\/a> gives three reasons to use Spot Instances:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Low, predictable prices<\/li><li>Massive scale<\/li><li>Easy to use<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Pricing &#8211; AWS Spot vs On-Demand Instances<\/h3>\n\n\n\n<p>AWS says:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>You can purchase Spot Instances at prices up to 90% lower than On-Demand Instances.<\/p><\/blockquote>\n\n\n\n<p>RedLine13 customer <a rel=\"noreferrer noopener\" aria-label=\"KMI Learning (opens in a new tab)\" href=\"http:\/\/www.kmilearning.com\/\" target=\"_blank\">KMI Learning<\/a>, based in Columbus, Ohio, builds custom eLearning solutions, and uses AWS Spot Instances. Eric Blevins, Systems Engineer at KMI Learning:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Redline13 has made it easy for us to save money by making Spot Instance bidding a built-in part of the RedLine13 load testing system.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">See what you can save BEFORE you start your test<\/h3>\n\n\n\n<p>RedLine13 makes it easy for you to see what you can save before you start your test. When you start a test, RedLine13 displays the anticipated hourly cost for On-Demand and for Spot.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/FsjnMjVRfPHXCSe9YzzexjXOYc0VaxmJH7JN4ZE3LzjLzmD5je-siy4dyq86gmRN3DVm9r2UnFr2InhonodWnBBHYMOqBoo4MDu5zu6I2vUyF-mDxmXo56skxhVNBV094kRO2dqI\" alt=\"AWS Spot vs. On-Demand Instances\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">New RedLine13 Enhancement for Load Testing with AWS Spot vs On-Demand Instances<\/h3>\n\n\n\n<p>If AWS Spot Instances are what is best for you, RedLine13 lets you set the default to Spot Instances in your settings. Just go to Account &gt; Your Settings and click on &#8220;Prefer spot instances&#8221;:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2019\/08\/AWS-Spot-as-Default.png\" alt=\"\" class=\"wp-image-6652\" width=\"274\" height=\"89\" srcset=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2019\/08\/AWS-Spot-as-Default.png 548w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2019\/08\/AWS-Spot-as-Default-300x97.png 300w\" sizes=\"auto, (max-width: 274px) 100vw, 274px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">AWS Spot Instance Limits<\/h3>\n\n\n\n<p>Of note especially important as you scale your test, your AWS account will need the appropriate Spot Instance limits in place to ensure you have the capability to provision what you request.  The limits (or &#8220;<em><a href=\"https:\/\/docs.aws.amazon.com\/general\/latest\/gr\/aws_service_limits.html\" target=\"_blank\" rel=\"noreferrer noopener\">Service Quotas<\/a><\/em>&#8220;) are applicable to all AWS accounts, though your specific limit will vary on how long you&#8217;ve had your account with AWS, as well as your particular use of AWS services.<\/p>\n\n\n\n<p>You may encounter the following message on RedLine13 as you scale your test:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded-1024x175.png\" alt=\"Max spot instance service quota error message on RedLine13\" class=\"wp-image-9869\" width=\"512\" height=\"88\" srcset=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded-1024x175.png 1024w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded-300x51.png 300w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded-768x132.png 768w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded-425x73.png 425w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/max-spot-instances-exceeded.png 1313w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><figcaption>If you encounter the &#8220;<em>MaxSpotInstanceCount<\/em>&#8221; message, continue reading for how to resolve this. <\/figcaption><\/figure><\/div>\n\n\n\n<p>To increase your Spot Instance limit, your will need to log into your <a href=\"http:\/\/AWS Management Console\">AWS Console<\/a>, open the Service Quota Dashboard, and search for &#8220;<em>EC2<\/em>&#8220;.  You will find the appropriate &#8220;<em>Spot Instance Requests<\/em>&#8221; item for your instance type.  In the example below, this limit is set to 640 vCPUs:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota-1024x70.png\" alt=\"AWS Spot Instance service quota\" class=\"wp-image-9870\" width=\"512\" height=\"35\" srcset=\"https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota-1024x70.png 1024w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota-300x21.png 300w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota-768x53.png 768w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota-425x29.png 425w, https:\/\/www.redline13.com\/blog\/wp-content\/uploads\/2022\/06\/spot_instance-service-quota.png 1367w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/figure><\/div>\n\n\n\n<p>Clicking on &#8220;<em>Request quota increase<\/em>&#8221; will open a form where you can specify a new limit.  Usually, AWS will respond to these requests quickly (often as soon as minutes to hours).  Once the new limit is in place, you will be able to utilize as many spot instance vCPU cores as you have specified.  Service quota increases are also <a href=\"https:\/\/www.redline13.com\/blog\/amazon-approval-for-large-tests\/\">explained in more detail<\/a> in a related post.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>See for yourself how much you&#8217;ll save<\/strong> with AWS Spot Instances and if it is right for you. You can easily run your own&nbsp;<a href=\"https:\/\/www.redline13.com\/Service\">RedLine13 test&nbsp;<\/a>and check out Load Testing with AWS Spot vs On-Demand instances.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many companies are struggling with the need for comprehensive load testing, the cost of load testing and limited budgets. This post will tell you about something you may not have considered: Load Testing with AWS Spot vs On-Demand Instances. To begin with, RedLine13 understands the high cost of load testing. If you don&#8217;t know the RedLine13 story, that&#8217;s what led us to create RedLine13 for our own testing. There are many different types of load testing<a class=\"more-link\" href=\"https:\/\/www.redline13.com\/blog\/2022\/06\/load-testing-with-aws-spot-vs-on-demand-instances\/\">Read More &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":4965,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,2],"tags":[91,94,165,183,408,449],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-user","4":"post-6636","6":"format-standard","7":"has-post-thumbnail","8":"category-aws","9":"category-blog","10":"post_tag-aws-on-demand-pricing","11":"post_tag-aws-spot-pricing","12":"post_tag-customer","13":"post_tag-ec2-instance","14":"post_tag-pricing","15":"post_tag-scalability-testing"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.12 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Load Testing with AWS Spot vs On-Demand Instances<\/title>\n<meta name=\"description\" content=\"Load Testing with AWS Spot vs On-Demand Instances. 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