--- title: Why Glance migrated its document database to Spanner description: Glance migrated its document database from Azure Cosmos DB to Spanner to improve database operations and lay the groundwork for better data science... canonical: https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Why Glance migrated its document database to Spanner | daily.dev og:description: Glance migrated its document database from Azure Cosmos DB to Spanner to improve database operations and lay the groundwork for better data science... og:url: https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv og:image: https://api.daily.dev/og/posts/wku5VQAMv.png og:image:alt: Why Glance migrated its document database to Spanner 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. # Why Glance migrated its document database to Spanner **[Google Cloud](https://daily.dev/sources/gcp)** · 6 min read · 0 upvotes · 0 comments ## Summary Glance migrated its document database from Azure Cosmos DB to Spanner to improve database operations and lay the groundwork for better data science capabilities. Spanner provides non-relational scale coupled with relational semantics and allows for seamless schema updates. Glance used tools like Key Visualizer and change streams during the migration process. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#database](https://daily.dev/tags/database), [#backend](https://daily.dev/tags/backend), [#sql](https://daily.dev/tags/sql), [#gcp](https://daily.dev/tags/gcp), [#spanner](https://daily.dev/tags/spanner) [View this post on daily.dev](https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv) ```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":"Why Glance migrated its document database to Spanner","url":"https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv"},"datePublished":"2024-03-04T17:03:32.726Z","dateModified":"2024-05-09T09:28:05.588Z","description":"Glance migrated its document database from Azure Cosmos DB to Spanner to improve database operations and lay the groundwork for better data science...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f8a83a480da3148e1e0a8cbc94594081?_a=AQAEufR","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f8a83a480da3148e1e0a8cbc94594081?_a=AQAEufR","isAccessibleForFree":true,"articleSection":"Google Cloud","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":"Google Cloud","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/gcp","url":"https://daily.dev/sources/gcp"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/why-glance-migrated-its-document-database-to-spanner-wku5vqamv","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"database,backend,sql,gcp,spanner","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Google Cloud","item":"https://daily.dev/sources/gcp"},{"@type":"ListItem","position":3,"name":"Why Glance migrated its document database to Spanner"}]} ```