--- title: Designing a Zero Downtime Migration Solution with Strong... description: This post provides an overview of a planned migration from a single-entry bookkeeping balance microservice (v1) to a double-entry bookkeeping balance... canonical: https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Designing a Zero Downtime Migration Solution with Strong Data Consistency – Part I | daily.dev og:description: This post provides an overview of a planned migration from a single-entry bookkeeping balance microservice (v1) to a double-entry bookkeeping balance... og:url: https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq og:image: https://api.daily.dev/og/posts/VXCY8ZJVq.png og:image:alt: Designing a Zero Downtime Migration Solution with Strong Data Consistency – Part I og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Designing a Zero Downtime Migration Solution with Strong Data Consistency – Part I **[Mercari Engineering](https://daily.dev/sources/mercari)** · 7 min read · 31 upvotes · 0 comments ## Summary This post provides an overview of a planned migration from a single-entry bookkeeping balance microservice (v1) to a double-entry bookkeeping balance microservice (v2) for a payment platform. The v2 service aims to reduce development costs and provide more organized and modern code. The post outlines the tech stack, current architecture, and different aspects of accounting, historical data, and bookkeeping services involved in the migration. The plan is spread across five parts, each covering different stages and elements of the migration. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#fintech](https://daily.dev/tags/fintech), [#kubernetes](https://daily.dev/tags/kubernetes), [#microservices](https://daily.dev/tags/microservices) [View this post on daily.dev](https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Designing a Zero Downtime Migration Solution with Strong Data Consistency – Part I","url":"https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq"},"datePublished":"2024-11-13T02:03:36.305Z","dateModified":"2026-03-15T05:20:48.172Z","description":"This post provides an overview of a planned migration from a single-entry bookkeeping balance microservice (v1) to a double-entry bookkeeping balance...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6bf45ec2685fdb3c966ab95ae82f7635?_a=AQAEuj9","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6bf45ec2685fdb3c966ab95ae82f7635?_a=AQAEuj9","isAccessibleForFree":true,"articleSection":"Mercari Engineering","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Mercari Engineering","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/cdde515cd83640748689d74c2d938fcf","url":"https://daily.dev/sources/mercari"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/designing-a-zero-downtime-migration-solution-with-strong-data-consistency-part-i-vxcy8zjvq","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":31},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"fintech,kubernetes,microservices","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Mercari Engineering","item":"https://daily.dev/sources/mercari"},{"@type":"ListItem","position":3,"name":"Designing a Zero Downtime Migration Solution with Strong Data Consistency – Part I"}]} ```