{"id":7718,"date":"2026-09-29T13:09:17","date_gmt":"2026-09-29T18:09:17","guid":{"rendered":"https:\/\/www.is-t.net\/blog\/?p=7718"},"modified":"2026-09-29T13:09:17","modified_gmt":"2026-09-29T18:09:17","slug":"cloud-migration-checklist","status":"publish","type":"post","link":"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/","title":{"rendered":"Cloud Migration Checklist (2026): Move Without Downtime"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#Cloud_Migration_in_2026_A_Step-by-Step_Checklist_to_Move_Without_Downtime\" >Cloud Migration in 2026: A Step-by-Step Checklist to Move Without Downtime<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#What_cloud_migration_actually_means\" >What cloud migration actually means<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#Why_cloud_migrations_run_over_budget_and_over_schedule\" >Why cloud migrations run over budget and over schedule<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#The_cloud_migration_checklist_8_steps_to_move_without_downtime\" >The cloud migration checklist: 8 steps to move without downtime<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#How_to_keep_downtime_near_zero_during_cutover\" >How to keep downtime near zero during cutover<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#Common_cloud_migration_mistakes_to_avoid\" >Common cloud migration mistakes to avoid<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/#Frequently_asked_questions\" >Frequently asked questions<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Cloud_Migration_in_2026_A_Step-by-Step_Checklist_to_Move_Without_Downtime\"><\/span>Cloud Migration in 2026: A Step-by-Step Checklist to Move Without Downtime<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-7719 size-full\" src=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero.png\" alt=\"Cloud migration checklist to move workloads to AWS, Azure, or Google Cloud without downtime\" width=\"2400\" height=\"1260\" srcset=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero.png 2400w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero-300x158.png 300w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero-1024x538.png 1024w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero-768x403.png 768w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero-1536x806.png 1536w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-hero-2048x1075.png 2048w\" sizes=\"(max-width: 2400px) 100vw, 2400px\" \/><\/p>\n<p><a href=\"https:\/\/www.is-t.net\/cloud-services\/cloud-migration-services\">Cloud migration<\/a> is the process of moving applications, data, and workloads from on-premises servers, or from one cloud into a cloud environment such as <a href=\"https:\/\/www.is-t.net\/cloud-services\/aws-consulting-services\">AWS<\/a>, <a href=\"https:\/\/www.is-t.net\/cloud-services\/azure-consulting-services\">Microsoft Azure<\/a>, or Google Cloud. When done well, the switch is nearly invisible to the clients, customers, and employees who use your systems every day. The trick to migrating without downtime is sequencing: assess and prioritize each workload, replicate data ahead of the switch, test the new environment in parallel, and cut over in small waves with a rollback plan ready. With our eight-step checklist , listed below, we can keep disruption close to zero.<\/p>\n<p><strong>Key Takeaways<\/strong><\/p>\n<ul>\n<li>Worldwide public cloud spending is forecast to reach $723.4 billion in 2025, up 21.5% from the year before, so getting migration right has real financial weight (Gartner).<\/li>\n<li>84% of organizations say that managing cloud spend is their top challenge, and cloud budgets are already running about 17% over plan (Flexera 2025 State of the Cloud Report).<\/li>\n<li>Most unplanned downtime happens at cutover, not during the move itself. Replicating data early and switching in waves keeps it near zero.<\/li>\n<li>A migration is only as safe as its rollback plan. Every wave should stay reversible until the new environment is proven stable.<\/li>\n<li>Picking the right approach for each workload (the 6 R&#8217;s, listed below) is what prevents the over-budget rebuilds that wreck timelines.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_cloud_migration_actually_means\"><\/span>What cloud migration actually means<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>At its simplest, cloud migration means moving computing work off hardware you own and onto an infrastructure you rent, allowing you to scale on demand. Some moves are a straight copy of a server into the cloud. Others rebuild an application, so it takes advantage of cloud-native services. The term cloud migration covers a wide range of effort, and the smartest organizations decide, workload by workload, how far to go. That decision usually follows the 6 R&#8217;s, a framework for classifying every system before it moves:<\/p>\n<ul>\n<li><strong>Rehost<\/strong> (Lift and Shift) &#8211; Move the workload as-is with minimal change. Though fast, it may not save much until you optimize later.<\/li>\n<li><strong>Replatform<\/strong> (Lift and Reshape) &#8211; Make a few cloud optimizations, such as a managed database, without rewriting the app.<\/li>\n<li><strong>Refactor<\/strong> (Re-Architect) &#8211; Rebuild the application to be cloud-native, often using containers and Kubernetes. Requires the most effort, but usually has the most long-term payoff.<\/li>\n<li><strong>Repurchase<\/strong> &#8211; Drop the old system and move to a SaaS product.<\/li>\n<li><strong>Retain<\/strong> &#8211; Leave a workload where it is for now, often for latency, compliance, or cost reasons.<\/li>\n<li><strong>Retire<\/strong> &#8211; Decommission anything you no longer need. Migrations are a great time to find dead weight.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Why_cloud_migrations_run_over_budget_and_over_schedule\"><\/span>Why cloud migrations run over budget and over schedule<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Planning, as opposed to technology, is where cloud migrations slip. In the <a href=\"https:\/\/www.flexera.com\/about-us\/press-center\/new-flexera-report-finds-84-percent-of-organizations-struggle-to-manage-cloud-spend\">Flexera 2025 State of the Cloud Report<\/a>, 84% of organizations named managing cloud spend as their single biggest cloud challenge, and respondents reported budgets running roughly 17% over plan. When you set that against <a href=\"https:\/\/www.gartner.com\/en\/newsroom\/press-releases\/2024-11-19-gartner-forecasts-worldwide-public-cloud-end-user-spending-to-total-723-billion-dollars-in-2025\">Gartner&#8217;s forecast<\/a> of $723.4 billion in public cloud spending for 2025, small planning gaps turn into huge expenditures.<\/p>\n<p>The usual culprits are predictable. Teams often lift and shift everything at once, so inefficient workloads that were cheap on old hardware become expensive to run in the cloud. Cost governance gets added after going live instead of before. Data transfer and testing are underestimated. And often nobody maps how systems depend on each other, so the first cutover breaks things no one expected. Every step in the checklist below exists to close one of those gaps.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_cloud_migration_checklist_8_steps_to_move_without_downtime\"><\/span><strong>The cloud migration checklist: 8 steps to move without downtime<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>Inventory and assess your workloads. <\/strong>Catalog every application, database, and service, then map the dependencies between them. You cannot move safely what you have not documented.<\/li>\n<li><strong>Set clear goals and success metrics. <\/strong>Decide what &#8220;done&#8221; looks like: a target cost per workload, a performance baseline, and a downtime tolerance for each system. These numbers drive every later trade-off.<\/li>\n<li><strong>Choose a migration strategy per workload. <\/strong>Assign each system one of the 6 R&#8217;s. A billing database and a marketing site do not deserve the same treatment, and matching effort to value is where budgets are won or lost.<\/li>\n<li><strong>Design the target architecture and security model. <\/strong>Build your landing zone first: network layout, identity and access management, encryption, logging, and cost guardrails. Security and spending controls belong at this stage, not as an afterthought.<\/li>\n<li><strong>Plan data migration and replication. <\/strong>Decide how each dataset moves and, crucially, set up continuous replication so the new environment stays in sync with the old one right up to the moment you switch.<\/li>\n<li><strong>Build and test in parallel. <\/strong>Stand up the new environment alongside the old, and then run real workloads against it. Test performance, integrations, and the rollback path, not just whether the app loads.<\/li>\n<li><strong>Cut over in waves with a rollback plan. <\/strong>Move a small, low-risk batch first during a quiet traffic window, confirm it is healthy, and then continue. Keep each wave reversible until you are sure.<\/li>\n<li><strong>Optimize after going live. <\/strong>Right-size instances, remove idle resources, and put ongoing cost and performance monitoring in place. This is continuous work, and many teams hand it to <a href=\"https:\/\/www.is-t.net\/managed-it-services-houston-tx\/24-7-cloud-managed-services\">managed cloud services<\/a> so the savings do not erode over time.<\/li>\n<\/ol>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-7722 size-full\" src=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic.png\" alt=\"8-step cloud migration checklist infographic covering assess, plan, replicate, test, cut over, and optimize\" width=\"2160\" height=\"2360\" srcset=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic.png 2160w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic-275x300.png 275w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic-937x1024.png 937w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic-768x839.png 768w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic-1406x1536.png 1406w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-checklist-infographic-1874x2048.png 1874w\" sizes=\"(max-width: 2160px) 100vw, 2160px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_keep_downtime_near_zero_during_cutover\"><\/span><strong>How to keep downtime near zero during cutover<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Downtime is a cutover problem, so it is best to treat the switch as its own project. Continuous data replication means the target is always current, so the final sync is measured in seconds rather than hours. Blue-green and canary techniques allow you shift a slice of traffic to the new environment, watch it, and shift more only when it holds. Lowering DNS time-to-live before the move lets you redirect users quickly, and rehearsing the whole cutover on a staging copy removes the surprises. Above all, define the exact conditions that trigger a rollback before you start, so the call is obvious under pressure as opposed to an unexpected debate at 2 a.m.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-7723 size-full\" src=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover.png\" alt=\"Zero-downtime cutover with a traffic router sending 90% live and 10% canary traffic, rollback ready\" width=\"2400\" height=\"1350\" srcset=\"https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover.png 2400w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover-300x169.png 300w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover-1024x576.png 1024w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover-768x432.png 768w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover-1536x864.png 1536w, https:\/\/www.is-t.net\/blog\/wp-content\/uploads\/2026\/09\/cloud-migration-zero-downtime-cutover-2048x1152.png 2048w\" sizes=\"(max-width: 2400px) 100vw, 2400px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Common_cloud_migration_mistakes_to_avoid\"><\/span><strong>Common cloud migration mistakes to avoid<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Lifting and shifting everything without reassessing whether each workload should move, change, or retire.<\/li>\n<li>Leaving cost guardrails until after launch, when overspending is already baked in.<\/li>\n<li>Skipping the dependency map and discovering hidden connections during cutover.<\/li>\n<li>Testing only the successful path and never rehearsing the rollback.<\/li>\n<li>Treating security and identity as a post-migration task instead of designing them into the landing zone.<\/li>\n<li>Declaring victory at go-live and skipping the optimization that actually delivers the savings.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_asked_questions\"><\/span><strong>Frequently asked questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>What is cloud migration?<\/strong><\/p>\n<p>Cloud migration is the process of moving applications, data, and other workloads from on-premises infrastructure or one cloud platform to another cloud environment such as AWS, Microsoft Azure, or Google Cloud. The goal is usually lower cost, better scalability, and easier management. A migration can be as simple as a rehost or as involved as a full re-architecture of the application.<\/p>\n<p><strong>How long does a cloud migration take?<\/strong><\/p>\n<p>Timelines vary with scope. A single application might move in a few weeks, while migrating a full data center of interdependent systems can take six months to well over a year. The biggest factors are the number of workloads, how tightly they depend on each other, and how much each one must be re-architected before it runs efficiently in the cloud.<\/p>\n<p><strong>How do you migrate to the cloud without downtime?<\/strong><\/p>\n<p>Near-zero downtime comes from replicating your data to the new environment ahead of time, running the old and new systems in parallel, and cutting over in small waves during low-traffic windows. Techniques like blue-green or canary cutovers, backed by a tested rollback plan, mean users keep working even if a wave must be reversed.<\/p>\n<p><strong>What are the biggest cloud migration risks?<\/strong><\/p>\n<p>The most common risks are cost overruns, unplanned downtime during cutover, data loss or corruption, and security gaps in the new environment. Most trace back to weak planning, such as no workload assessment, no cost guardrails, and no rehearsed rollback. Flexera&#8217;s 2025 State of the Cloud Report found that 84% of organizations struggle to control cloud spend, which is why cost governance belongs in the plan from day one.<\/p>\n<p><strong>What is the 6 R&#8217;s cloud migration strategy?<\/strong><\/p>\n<p>The 6 R&#8217;s are six ways to handle each workload during a migration: rehost (lift and shift as-is), replatform (make a few cloud optimizations), refactor (rebuild for the cloud), repurchase (switch to a SaaS product), retain (leave it in place for now), and retire (decommission what you no longer need). Choosing the right R for each system controls both cost and effort.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cloud Migration in 2026: A Step-by-Step Checklist to Move Without Downtime Cloud migration is the process of moving applications, data, and workloads from on-premises servers, or from one cloud into a cloud environment such as AWS, Microsoft Azure, or Google Cloud. When done well, the switch is nearly invisible to the clients, customers, and employees [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":7723,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-7718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-managed-services"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cloud Migration Checklist (2026): Move Without Downtime Cloud Migration Checklist (2026): Move Without Downtime - IS&amp;T Blog<\/title>\n<meta name=\"description\" content=\"A step-by-step 2026 cloud migration checklist to move apps and data to the cloud with minimal downtime, fewer budget overruns, and less risk.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.is-t.net\/blog\/cloud-migration-checklist\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cloud Migration Checklist (2026): Move Without Downtime Cloud Migration Checklist (2026): Move Without Downtime - 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