--- sourceDocument: zurich Combined Product Files sourceDocumentLink: https://www.servicenow.com/docs/r/zurich/delta-yokohama-zurich Release : - zurich ft:locale : - en-US ft:publication_title : - zurich Combined Product Files ft:clusterId : - delta3zy bundleId : - delta3zy --- # Combined Instance Data Replication release notes for upgrades from Yokohama to Zurich # Combined Instance Data Replication release notes for upgrades from Yokohama to Zurich {#ariaid-title1} Release version: Zurich Updated October 8, 2026 ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 5 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Combined Instance Data Replication Release Notes for Upgrades from Yokohama to Zurich This consolidated resource provides important details for ServiceNow customers upgrading Instance Data Replication (IDR) from the Yokohama release family to Zurich. It highlights key new features, changes, deprecations, and upgrade considerations to support a smooth transition and improved data replication performance. Show full answer Show less ## Key Features * **Scheduled Seeding:** Enables replicating data at scheduled times daily from producer to consumer instances. * **Concurrent Seeding Requests:** Supports running multiple seeding requests simultaneously across different replication sets, limited to one active request per set. * **Automatic Reseeding:** Missing or mismatched records can be automatically reseeded when creating a data comparison request. * **Monitoring Enhancements (Zurich):** Track scheduled replication sets and individual replication requests using the IDR Monitoring Dashboard and related lists, improving visibility into replication progress. * **Coral Theme (Zurich):** Introduces a fresh, brand-neutral default user interface theme with a dark mode option for portal, web, and mobile experiences. ## Upgrade Considerations and Changes * **Upgrade to V2 Replication Sets:** Critical to improve IDR performance and efficiency by migrating legacy replication sets to V2, which uses the Hermes Messaging Service. Legacy sets are deprecated and unsupported in Zurich. * **Log Rotation:** Post-upgrade, log rotation is automatically enabled for the Replication Payload Error table, using a seven-shard schedule with five days per shard. Pre-upgrade log entries are truncated. * **Seeding and Data Comparison Improvements:** V2 replication sets remove limits on the number of records in seeding requests and comparison counts, and attachments are now included in data comparisons. * **Performance Optimizations:** Seeding throughput and messaging queue efficiency have been enhanced for better replication performance. * **Deprecated Features:** Legacy replication sets are no longer supported, and certain diagnostic tests (Key Management Service and VAULT Service Status) have been removed from the IDR Diagnostics page. ## Activation and Subscription Instance Data Replication is part of the ServiceNow AI Platform and requires activation of the **IDR (com.glide.idr)** plugin along with a separate subscription. Customers must request this subscription to enable the feature. ## Accessibility and User Experience The new Coral theme includes a dark mode option designed to reduce eye strain and improve readability for web and mobile users. ## Practical Benefits for ServiceNow Customers * Improved replication performance and efficiency via the Hermes Messaging Service. * Enhanced monitoring capabilities to track replication progress and quickly identify issues. * Greater flexibility and capacity for seeding and data comparison operations. * Streamlined upgrade process with automated log management. * Modernized user interface with accessibility improvements. By following the outlined upgrade tasks and leveraging the new features in Zurich, customers can expect more reliable and manageable data replication across their ServiceNow instances. Consolidated page of all release notes for Instance Data Replication from Yokohama to Zurich. ## How to use this page To help you prepare for your upgrade, we have combined the cross-family Instance Data Replication release notes onto one page. Read this summary of the new features, changes, and updated information for your product from Yokohama to Zurich. Tip: If there were no updates for a release notes section in a certain family release, we included a short note for your reference. For example, if a product did not have any updates in Tokyo, the row says "No updates for this release." ## Important information for upgrading Instance Data Replication to Zurich Before you upgrade to Zurich, review these pre- and post-upgrade tasks and complete the tasks as needed. {#dfrn3-instancedatareplication-summary__entry__2} | Release | Release notes | |-|-| | Yokohama | Upgrade information : Improve the performance and processing efficiency of Instance Data Replication (IDR) by upgrading your replication sets to V2, which uses Hermes Messaging Service. For details, see [Upgrading legacy sets](https://www.servicenow.com/docs/access?context=upgrading-legacy-replication-sets-v2&family=yokohama&ft:locale=en-US). Log rotation is automatically enabled for the Replication Payload Error \[idr_replication_payload_error\] table after the upgrade. By default, the log rotation schedule is comprised of seven shards, with five days for each shard. All log entries in this table created before the upgrade are automatically truncated. | | Zurich | Upgrade information : * Improve the performance and processing efficiency of Instance Data Replication (IDR) by upgrading your replication sets to V2, which uses Hermes Messaging Service. For details, see [Upgrading legacy sets](https://www.servicenow.com/docs/access?context=upgrading-legacy-replication-sets-v2&family=zurich&ft:locale=en-US). * Log rotation is automatically enabled for the Replication Payload Error \[idr_replication_payload_error\] table after the upgrade. By default, the log rotation schedule is composed of seven shards, with five days for each shard. All log entries in this table created before the upgrade are automatically truncated. | [ ] ## New features Between your current release family and Zurich, new features were introduced for Instance Data Replication. {#dfrn3-instancedatareplication-summary__entry__8} | Release | Release notes | |-|-| | Yokohama | [Scheduled seeding](https://www.servicenow.com/docs/access?context=set-up-scheduled-replication-idr&family=yokohama&ft:locale=en-US) : Replicate data from a producer to a consumer at scheduled times each day. [Multiple seeding requests](https://www.servicenow.com/docs/access?context=seed-consumer-instance&family=yokohama&ft:locale=en-US) : Run concurrent seeding requests across multiple replication sets, with up to one active request per set. [Automatically seed missing or mismatched records](https://www.servicenow.com/docs/access?context=compare-replicated-data&family=yokohama&ft:locale=en-US) : Automatically seed missing or mismatched records when you create a data comparison request. | | Zurich | [Monitor scheduled replication sets](https://www.servicenow.com/docs/access?context=instance-data-replication-dashboard&family=zurich&ft:locale=en-US) : Monitor the progress your scheduled replication sets in the IDR Monitoring Dashboard. [Track scheduled replication requests](https://www.servicenow.com/docs/access?context=set-up-scheduled-replication-idr&family=zurich&ft:locale=en-US) : Track the progress of scheduled replication requests in the Scheduled Replication Requests related list. | [ ] ## Changes Between your current release family and Zurich, some changes were made to existing Instance Data Replication features. {#dfrn3-instancedatareplication-summary__entry__14} | Release | Release notes | |-|-| | Yokohama | [Seeding request improvements](https://www.servicenow.com/docs/access?context=exploring-instance-data-replication&family=yokohama&ft:locale=en-US) : In V2 replication sets, the number of records in a seeding request is now unlimited. [Data comparison improvements](https://www.servicenow.com/docs/access?context=comparing-replicated-data&family=yokohama&ft:locale=en-US) : In V2 replication sets, the number of records in comparison or reseeding counts is now unlimited. [Reseed missing attachments](https://www.servicenow.com/docs/access?context=comparing-replicated-data&family=yokohama&ft:locale=en-US) : Attachments are now included in data comparison requests. [Seeding performance improvements](https://www.servicenow.com/docs/access?context=seed-consumer-instance&family=yokohama&ft:locale=en-US) : Seeding throughput and message queue efficiency has been optimized in IDR. | | Zurich | Coral theme : Coral is now the default theme for new portal, web, and mobile experiences with Next Experience or Core UI enabled. This theme provides a fresh look and feel, featuring brand-neutral illustrations to enhance your user experience. A dark theme option is available for web and mobile experiences. | [ ] ## Removed Between your current release family and Zurich, some Instance Data Replication features or functionality were removed. {#dfrn3-instancedatareplication-summary__entry__20} | Release | Release notes | |-|-| | Yokohama | No updates for this release. | | Zurich | No updates for this release. | [ ] ## Deprecations Between your current release family and Zurich, some Instance Data Replication features or functionality were deprecated. {#dfrn3-instancedatareplication-summary__entry__26} | Release | Release notes | |-|-| | Yokohama | Legacy replication sets are planned for deprecation by the Zurich release. To continue replicating data in Zurich, you must upgrade all legacy replication sets to V2. For details on upgrading legacy replication sets to V2 before the upgrade, see [Upgrading legacy sets](https://www.servicenow.com/docs/access?context=upgrading-legacy-replication-sets-v2&family=yokohama&ft:locale=en-US). | | Zurich | Legacy replication sets have been deprecated in the Zurich release and are no longer supported. * The Key Management Service test has been removed from the IDR Diagnostics page. * The VAULT Service Status test has been removed from the IDR Diagnostics page. | [ ] ## Activation information Review information on how to activate Instance Data Replication. {#dfrn3-instancedatareplication-summary__entry__32} | Release | Release notes | |-|-| | Yokohama | Activation information : Instance Data Replication is a ServiceNow AI Platform feature that is available with activation of the IDR (com.glide.idr) plugin, which requires a separate subscription. For details, see [Request an Instance Data Replication subscription](https://www.servicenow.com/docs/access?context=request-instance-data-replication&family=yokohama&ft:locale=en-US). | | Zurich | Activation information : Instance Data Replication is a ServiceNow AI Platform feature that is available with activation of the IDR (com.glide.idr) plugin, which requires a separate subscription. For details, see [Request a subscription](https://www.servicenow.com/docs/access?context=request-instance-data-replication&family=zurich&ft:locale=en-US). | [ ] ## Additional requirements If any additional requirements were introduced or changed for Instance Data Replication we have noted them here. {#dfrn3-instancedatareplication-summary__entry__38} | Release | Release notes | |-|-| | Yokohama | No updates for this release. | | Zurich | No updates for this release. | [ ] ## Browser requirements If any specific browser requirements were introduced or changed for Instance Data Replication we have noted them here. {#dfrn3-instancedatareplication-summary__entry__44} | Release | Release notes | |-|-| | Yokohama | No updates for this release. | | Zurich | No updates for this release. | [ ] ## Accessibility information Review details on accessibility information for Instance Data Replication, such as specific requirements or compliance levels. {#dfrn3-instancedatareplication-summary__entry__50} | Release | Release notes | |-|-| | Yokohama | No updates for this release. | | Zurich | Accessibility information : Dark theme : The new Coral theme includes a dark theme option for web and mobile experiences. This option is commonly used to alleviate eye strain and improve readability. | [ ] ## Localization information If there are specific localization considerations for Instance Data Replication we have noted them here. {#dfrn3-instancedatareplication-summary__entry__56} | Release | Release notes | |-|-| | Yokohama | No updates for this release. | | Zurich | No updates for this release. | [ ] ## Highlight information If there are specific highlight considerations for Instance Data Replication we have noted them here. {#dfrn3-instancedatareplication-summary__entry__62} | Release | Release notes | |-|-| | Yokohama | * Replicate data that's frequently updated in large tables on your instance by scheduling data replication. * Queue multiple seeding requests from your producer instance. * Reseed missing or mismatched records automatically when creating a data comparison request. See [Instance Data Replication](https://www.servicenow.com/docs/access?context=instance-data-replication&family=yokohama&ft:locale=en-US) for more information. | | Zurich | * Monitor the progress of all your scheduled replication sets. * Track the progress of scheduled replication requests within a scheduled replication set. * Access details of scheduled replication requests within a scheduled replication set. See [Instance Data Replication](https://www.servicenow.com/docs/access?context=instance-data-replication&family=zurich&ft:locale=en-US) for more information. | [ ]