{"id":194000,"date":"2025-04-10T06:53:00","date_gmt":"2025-04-10T05:53:00","guid":{"rendered":"https:\/\/datascientest.com\/en\/?p=194000"},"modified":"2025-04-14T08:53:35","modified_gmt":"2025-04-14T07:53:35","slug":"all-about-event-sourcing","status":"publish","type":"post","link":"https:\/\/datascientest.com\/en\/all-about-event-sourcing","title":{"rendered":"Event Sourcing: What is it? Why adopt this architecture?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"194000\" class=\"elementor elementor-194000\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c5d8fa0 e-flex e-con-boxed e-con\" data-id=\"c5d8fa0\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bfcfb97 elementor-widget elementor-widget-text-editor\" data-id=\"bfcfb97\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p><b>Discover Event Sourcing, a modern architectural model that records all changes made to your data. It provides a structured approach that simplifies updates and the tracking of specific events within your applications.<\/b><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e365053 e-flex e-con-boxed e-con\" data-id=\"e365053\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-19a0a57 elementor-widget elementor-widget-heading\" data-id=\"19a0a57\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-xl\">What is Event Sourcing?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6020eaf elementor-widget elementor-widget-text-editor\" data-id=\"6020eaf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> is an <a href=\"https:\/\/datascientest.com\/en\/all-about-zero-trust-architecture\">architectural model<\/a> that fundamentally alters how we store data.<\/span><\/p><p><span style=\"font-weight: 400;\">Rather than merely capturing the <\/span><b>current state<\/b><span style=\"font-weight: 400;\"> of the data, it records each alteration as <\/span><b>immutable events<\/b><span style=\"font-weight: 400;\">. Consider a bank account: instead of storing only the final balance, <\/span><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> records each deposit and withdrawal ever made.<\/span><\/p><p><span style=\"font-weight: 400;\">These events form an immutable source of truth, akin to an accounting ledger that can only be appended to and never altered. This approach ensures complete <\/span><b>traceability<\/b><span style=\"font-weight: 400;\">: every change is timestamped and preserved, allowing for a precise understanding of how the system attained its current state. <\/span><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> thus upholds data integrity while enabling the reconstruction of any past state of the <\/span><b>system<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-daefc1d e-flex e-con-boxed e-con\" data-id=\"daefc1d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6faa00f elementor-widget elementor-widget-heading\" data-id=\"6faa00f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">When to Use Event Sourcing?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc65d20 elementor-widget elementor-widget-text-editor\" data-id=\"cc65d20\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> is particularly advantageous in systems where <\/span><b>traceability<\/b><span style=\"font-weight: 400;\"> and <\/span><b>auditability<\/b><span style=\"font-weight: 400;\"> are paramount. Relevant use cases include:<\/span><\/p><table><tbody><tr><td><p><b>Use Case<\/b><\/p><\/td><td><p><b>Description<\/b><\/p><\/td><\/tr><tr><td><p><b>Financial Applications<\/b><\/p><\/td><td><p><span style=\"font-weight: 400;\">Each transaction is logged as an event, ensuring complete traceability and reliable audits.<\/span><\/p><\/td><\/tr><tr><td><p><b>Order Management Systems<\/b><\/p><\/td><td><p><span style=\"font-weight: 400;\">Order tracking is facilitated by recording events: creation, modification, validation, shipping, etc.<\/span><\/p><\/td><\/tr><tr><td><p><b>Collaborative Applications<\/b><\/p><\/td><td><p><span style=\"font-weight: 400;\">The history of changes enables the tracking of every action, which is essential for version control or shared editing tools.<\/span><\/p><\/td><\/tr><tr><td><p><b>Complex Business Systems<\/b><\/p><\/td><td><p><span style=\"font-weight: 400;\">Understanding data evolution becomes possible, aiding in the analysis of past decisions and optimization of <\/span><a href=\"https:\/\/datascientest.com\/en\/workflow-definition-and-advantages\"><span style=\"font-weight: 400;\">business process modeling<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69ae6c3 elementor-widget elementor-widget-image\" data-id=\"69ae6c3\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"448\" src=\"https:\/\/datascientest.com\/en\/files\/2025\/02\/dst_acquisition_screens_displaying_data_in_a_desktop._-ar_169__865c14f2-7a8e-48d4-a912-caa62de74261-1024x574.webp\" class=\"attachment-large size-large wp-image-194003\" alt=\"\" srcset=\"https:\/\/datascientest.com\/en\/files\/2025\/02\/dst_acquisition_screens_displaying_data_in_a_desktop._-ar_169__865c14f2-7a8e-48d4-a912-caa62de74261-1024x574.webp 1024w, https:\/\/datascientest.com\/en\/files\/2025\/02\/dst_acquisition_screens_displaying_data_in_a_desktop._-ar_169__865c14f2-7a8e-48d4-a912-caa62de74261-300x168.webp 300w, https:\/\/datascientest.com\/en\/files\/2025\/02\/dst_acquisition_screens_displaying_data_in_a_desktop._-ar_169__865c14f2-7a8e-48d4-a912-caa62de74261-768x430.webp 768w, https:\/\/datascientest.com\/en\/files\/2025\/02\/dst_acquisition_screens_displaying_data_in_a_desktop._-ar_169__865c14f2-7a8e-48d4-a912-caa62de74261.webp 1456w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e94a2a elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"3e94a2a\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/datascientest.com\/en\/data-courses\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Learn how to use Event Sourcing<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-57be152 e-flex e-con-boxed e-con\" data-id=\"57be152\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-22a94d1 elementor-widget elementor-widget-heading\" data-id=\"22a94d1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">What are the Advantages of Event Sourcing?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9e124c elementor-widget elementor-widget-text-editor\" data-id=\"b9e124c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Event sourcing offers numerous and substantial benefits:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Technically, it provides <\/span><b>complete traceability<\/b><span style=\"font-weight: 400;\">, allowing for the reconstruction of the IT system&#8217;s state at any prior moment, thus significantly easing <\/span><b>debugging<\/b><span style=\"font-weight: 400;\"> and <\/span><b>auditing<\/b><span style=\"font-weight: 400;\">. The immutable nature of the events ensures data integrity in accordance with the ACID approach and eliminates risks of corruption.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">From a business perspective, <\/span><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> enables in-depth analysis of <\/span><b>user behaviors<\/b><span style=\"font-weight: 400;\"> by <\/span><a href=\"https:\/\/datascientest.com\/en\/all-about-web-analytics-consultant\"><span style=\"font-weight: 400;\">Web Analytics Consultants<\/span><\/a><span style=\"font-weight: 400;\">, as each action is preserved <\/span><b>chronologically<\/b><span style=\"font-weight: 400;\">. This temporal analysis capability is invaluable for understanding process evolution and making informed decisions.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The architecture also enhances <\/span><b>scalability<\/b><span style=\"font-weight: 400;\"> and <\/span><b>performance<\/b><span style=\"font-weight: 400;\"> through efficient caching and load balancing. The clear separation between events and their interpretation facilitates system evolution: new features can be introduced by interpreting existing events differently without altering history.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> naturally integrates with modern event-driven architectures and <\/span><b>CQRS (Command Query Responsibility Segregation)<\/b><span style=\"font-weight: 400;\">, providing a robust foundation for complex distributed systems.<\/span><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-afa11dc e-flex e-con-boxed e-con\" data-id=\"afa11dc\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-75b1f3b elementor-widget elementor-widget-heading\" data-id=\"75b1f3b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">How to Use Event Sourcing?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1bd16a elementor-widget elementor-widget-text-editor\" data-id=\"f1bd16a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Implementing Event Sourcing requires a structured strategy:<\/span><\/p><ol><li><span style=\"font-weight: 400;\">Start by identifying <\/span><b>key events<\/b><span style=\"font-weight: 400;\"> within your business domain, such as &#8220;Order Created&#8221; or &#8220;Payment Made.&#8221; These events should be <\/span><b>immutable<\/b><span style=\"font-weight: 400;\"> and contain all <\/span><b>relevant data<\/b><span style=\"font-weight: 400;\"> pertaining to the state change.<\/span><\/li><li><span style=\"font-weight: 400;\">Implement an <\/span><b>Event Store<\/b><span style=\"font-weight: 400;\"> to persist these events sequentially. Each event is given a unique identifier and a timestamp. The Event Store must ensure that events are stored in order and cannot be altered once recorded.<\/span><\/li><li><span style=\"font-weight: 400;\">Create <\/span><b>Event Handlers<\/b><span style=\"font-weight: 400;\"> that respond to events to update read views (projections). These projections transform the event stream into a format optimized for <\/span><b>queries<\/b><span style=\"font-weight: 400;\">. For example, an &#8220;Account Balance&#8221; projection calculates the sum of transactions from debit and credit events.<\/span><\/li><li><span style=\"font-weight: 400;\">Establish a <\/span><b>snapshot mechanism<\/b><span style=\"font-weight: 400;\"> to optimize state reconstruction: instead of replaying all events, the system can commence from a snapshot and apply only the more recent events.<\/span><\/li><li><span style=\"font-weight: 400;\">Finally, incorporate an <\/span><b>event versioning system<\/b><span style=\"font-weight: 400;\"> to manage the evolution of their structure over time.<\/span><\/li><\/ol>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1844546 elementor-widget elementor-widget-image\" data-id=\"1844546\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"895\" src=\"https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-915x1024.jpg\" class=\"attachment-large size-large wp-image-194004\" alt=\"\" srcset=\"https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-915x1024.jpg 915w, https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-268x300.jpg 268w, https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-768x860.jpg 768w, https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-1372x1536.jpg 1372w, https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing-1830x2048.jpg 1830w, https:\/\/datascientest.com\/en\/files\/2025\/02\/Illustration-Application-Sourcing.jpg 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95e5d31 elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"95e5d31\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/datascientest.com\/en\/data-courses\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Mastering event sourcing<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2d64c6d e-flex e-con-boxed e-con\" data-id=\"2d64c6d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-982e5ec elementor-widget elementor-widget-heading\" data-id=\"982e5ec\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">Practical Case: E-commerce Website<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f93c0e4 elementor-widget elementor-widget-text-editor\" data-id=\"f93c0e4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Consider managing <\/span><b>an online shopping site<\/b><span style=\"font-weight: 400;\">. When a customer places an order, several events occur:<\/span><\/p><ol><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Order Created: The customer added items to the cart and confirmed the purchase.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Payment Confirmed: The payment is successfully processed.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Order Shipped: The items are prepared and dispatched.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Order Delivered: The customer receives the products.<\/span><\/li><\/ol>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98caf3c elementor-widget elementor-widget-text-editor\" data-id=\"98caf3c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Each event is documented in an <\/span><b>Event Store<\/b><span style=\"font-weight: 400;\">. These events are immutable, meaning they cannot be altered after being recorded. To determine the status of an order, the application replays all events associated with that order to reconstruct its state.<\/span><\/p><p><span style=\"font-weight: 400;\">For instance, if you wish to display <\/span><b>the status of an order<\/b><span style=\"font-weight: 400;\">, the system reads the events and observes that the latest step is &#8220;Order Shipped.&#8221; This allows for precise monitoring of each order&#8217;s progress without losing any information.<\/span><\/p><p><span style=\"font-weight: 400;\">Additionally, <\/span><b>projections<\/b><span style=\"font-weight: 400;\"> (optimized views) can be created, such as <a href=\"https:\/\/datascientest.com\/en\/dashboard-what-is-it\">a dashboard<\/a> showing the total number of orders shipped. This approach ensures total traceability of operations while allowing for flexible and <a href=\"https:\/\/datascientest.com\/en\/data-management-course\">responsive data management<\/a>.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b8c64c1 e-flex e-con-boxed e-con\" data-id=\"b8c64c1\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f21d2e9 elementor-widget elementor-widget-heading\" data-id=\"f21d2e9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">What are the Challenges of Event Sourcing?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b6abfb elementor-widget elementor-widget-text-editor\" data-id=\"6b6abfb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Event Sourcing<\/b><span style=\"font-weight: 400;\"> presents several technical and organizational challenges:<\/span><\/p><ul><li><b>Managing performance<\/b><span style=\"font-weight: 400;\"> is a major challenge: replaying numerous events to reconstruct the current state can demand substantial resources. Implementing <\/span><b>snapshots<\/b><span style=\"font-weight: 400;\"> becomes crucial to optimizing performance.<\/span><\/li><li><b>Designing events<\/b><span style=\"font-weight: 400;\"> warrants careful deliberation: once defined, they are immutable and difficult to modify. <\/span><b>Event schema evolution<\/b><span style=\"font-weight: 400;\"> requires complex <\/span><b>migration<\/b><span style=\"font-weight: 400;\"> strategies to maintain compatibility with historical data.<\/span><\/li><li><b>Storage<\/b><span style=\"font-weight: 400;\"> also poses a significant challenge: every change generates a new event, leading to continuous growth in <\/span><b>data volume<\/b><span style=\"font-weight: 400;\">. Managing this growth demands well-thought-out <a href=\"https:\/\/datascientest.com\/en\/data-cleaning-definition-methods-and-relevance-in-data-science\">archiving and cleaning strategies<\/a>.<\/span><\/li><li><b>The increased complexity of the system<\/b><span style=\"font-weight: 400;\"> can slow down development and increase the learning curve for new developers. Complex queries often necessitate dedicated projections, adding an extra layer of complexity to system maintenance.<\/span><\/li><li><b>The eventual consistency inherent in event-based systems<\/b><span style=\"font-weight: 400;\"> can complicate managing use cases that require immediate consistency.<\/span><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-00abbdf e-flex e-con-boxed e-con\" data-id=\"00abbdf\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ebd0bf1 elementor-widget elementor-widget-heading\" data-id=\"ebd0bf1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-xl\">Conclusion<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-614975b elementor-widget elementor-widget-text-editor\" data-id=\"614975b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Event sourcing is a powerful approach for managing systems that require traceability and precise change tracking. By recording every event immutably, it offers complete transparency of data evolution.<\/span><\/p><p><span style=\"font-weight: 400;\">However, implementing event sourcing requires careful consideration. It can increase technical complexity, especially regarding infrastructure management, event storage, and versioning.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-53d0b67 elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"53d0b67\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/datascientest.com\/en\/data-courses\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Become a Software Engineer<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f3d4656 e-flex e-con-boxed e-con\" data-id=\"f3d4656\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fff293d elementor-widget elementor-widget-html\" data-id=\"fff293d\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What is Event Sourcing?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Event Sourcing is an architectural pattern where every state change of a system is stored as an immutable event. 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Rather than merely capturing the current [&hellip;]<\/p>\n","protected":false},"author":45,"featured_media":194002,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"content-type":"","inline_featured_image":false},"categories":[2421],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v21.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Event Sourcing: What is it? Why adopt this architecture?<\/title>\n<meta name=\"description\" content=\"Discover Event Sourcing, a modern architectural pattern that records all changes to your data. 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