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Real-world Production MongoDB Realm Application Migration: Exploring Options and Strategies

2024-09-27 · /gluesync/real-world-production-mongodb-realm-application-migration-exploring-options-and-strategies/

MongoDB Realm migration

Explore real-world strategies for migrating MongoDB Realm applications. Learn about alternative mobile database solutions, challenges of live migration, and how Gluesync enables seamless transitions without downtime.

In the dynamic world of mobile app development, adaptability is key. Recently, MongoDB announced the phasing out of Realm, their mobile database solution, leaving many developers and organizations searching for alternatives. This shift in the market landscape presents both challenges and opportunities for mobile app developers. Let’s delve into the possible options available on the market and explore how to migrate your production mobile app smoothly and efficiently.

The Changing Mobile Database Landscape

MongoDB Realm, known for its offline-first capabilities and real-time synchronization, has been a popular choice for mobile app developers. Its phase-out announcement has sparked discussions about the future of mobile data solutions. As we navigate this transition, it’s crucial to understand the available alternatives and the implications of migrating a production app.

Market Options for Mobile Databases

Several robust solutions have emerged as potential replacements for MongoDB Realm:

  1. Couchbase Mobile: Offers strong offline-first capabilities, multi-model data storage, and efficient synchronization.
  2. Firebase Realtime Database: Provides real-time data syncing and offline support, backed by Google’s infrastructure.
  3. SQLite: A lightweight, serverless database engine that’s directly embedded into applications.
  4. Realm Database (by MongoDB): While being phased out, it’s still an option for those looking to maintain their current setup in the short term (but without DB infra)
  5. Ditto: A peer-to-peer database solution that offers offline-first capabilities, real-time sync, and conflict resolution without requiring a centralized server (a part from what they call “Big peer”)
  6. Custom Solutions: Some organizations opt for building proprietary mobile data synchronization systems tailored to their specific needs.

Each of these options comes with its own set of features, benefits, and considerations. 

The choice among these options largely depends on your application’s specific requirements, scalability needs, and long-term technology strategy. Factors to consider include:

  • Sync capabilities and performance
  • Offline functionality
  • Scalability and cost
  • Ease of integration and migration
  • Community support and long-term viability

Since along with MongoDB’s announcement of Realm being phasing out shortly also came into the picture their partnership with Ditto [more on that here] let’s highlight a bit some of its feature in comparison to what’s being previously offered by MongoDB Atlas Realm.

Spotlight on Ditto

Ditto stands out with its peer-to-peer architecture, which allows for direct device-to-device synchronization without necessarily requiring a central server. Key features include:

  • Offline-First Design: Applications can function fully offline and sync when connectivity is restored.
  • Peer-to-Peer Sync: Enables direct sync between devices, which can be particularly useful for local collaborative scenarios [this is something new for Realm users]
  • Conflict Resolution: Built-in automatic conflict resolution to handle simultaneous updates.
  • Cross-Platform Support: Works across iOS, Android, and web platforms.
  • Flexible Deployment: Can be deployed in peer-to-peer mode, client-server mode, or a hybrid of both.
Ditto architecture

A part from the marketing side of things, we want to be pragmatic here since we’re considering options for a (successfully) safe & smooth transition from a platform set to phase out soon. 

Let’s break down the technical offering:

  • Connector for MongoDB: it is being advertised the availability, soon to be but not yet there, of a connector that should directly integrate with MongoDB and pump data into Ditto’s Big peer;
  • Support: while MongoDB, just like other famous solutions, are known for their enterprise-grade support with the plus of offering free community options (forum, documentation, …) and the enormous number of qualified system integrator partners, Ditto’s offering on such topics still has to be proven; Let’s not try hiding things: we all know that company is fairly new and partners are not so many, as for now;
  • Main source of truth: Ditto doesn’t come with a main source of truth unlike other DBs, like MongoDB or Couchbase, where we are used to centralize the coordination of our data ops tasks or just have a “single source of truth” instead Ditto is fully distributed;

Full replacement or way out?

While it is good that MongoDB offered a “way out” for current Realm that would have otherwise left alone without a solution, I personally see that maneuver as a partial replacement and not a full solution: the architecture Ditto offers really differs from the server-push&pull-to-edge deployment we are being used to have with solutions like MongoDB realm or Couchbase for example. Forcing users to shift to a fully edge-distributed pattern which might not fit well all use cases. The connector is still in a private sort of beta program which indicates some more work has to be carried for a production grade solution, while developers and architects have to rush for finding a real solution to solve their today’s issue: a code refactor is anyway inevitable and, being it big or small, certain parts of the app requires to be touched and updates to be rolled out to users; this generally takes from 6 to up to 12 months depending on how huge the user base is, how much decoupled the data layer was from the presentation and business logics layers.

There’s not much time to at least start drafting up which path to follow next.

The Challenge of Live Migration

Regardless of which solution you choose, migrating a database in a production environment presents significant challenges. Traditional migration approaches often require:

  1. Freezing the application
  2. Taking the system offline
  3. Performing the migration
  4. Extensive testing
  5. Redeploying the application

This process can lead to significant downtime, frustrated users, and potential data inconsistencies. For B2C applications, where developers have limited control over when users update their apps, this approach is particularly problematic.

Introducing Gluesync: A Solution for Seamless Live Migrations

At MOLO17, we recognized the need for a tool that could facilitate smooth transitions between different mobile database solutions. That’s why we developed Gluesync, our advanced data integration platform designed to perform smooth, safe, and highly performant LIVE migrations.

While Gluesync is capable of handling various migration scenarios, in this article, we’ll focus on its application in migrating from MongoDB Realm (hosted on Atlas) to Couchbase Mobile (hosted in Capella or on-premises), as an example of how it can be used to transition between different mobile database solutions.

Key Features of Gluesync:

  1. Bi-directional Synchronization: Gluesync maintains data consistency between MongoDB and Couchbase in real-time, allowing for a gradual migration process from MongoDB Realm and Couchbase Mobile deployments.
  2. Zero Downtime: Users can continue using the application without interruption, as Gluesync handles the data transfer in the background between the two platforms.
  3. Gradual User Migration: As users update their applications, they can be seamlessly transitioned to the new Couchbase Mobile backend without losing data or functionality.
  4. Data Integrity: Advanced conflict resolution ensures that data remains consistent across both platforms during the migration process.
  5. Scalability: Designed to handle large-scale migrations, Gluesync can manage high volumes of data and users efficiently.

The Migration Process with Gluesync

Looking for a reliable MongoDB Realm migration solution? Gluesync offers a structured, step-by-step process that ensures seamless data transition without service interruption. Here’s how the migration workflow operates:

  1. Setup: Configure Gluesync to connect with both your MongoDB Realm and Couchbase Mobile instances.
  2. Initial Sync: Perform an initial bulk data transfer to populate the Couchbase Mobile database, via Gluesync’s Snapshot feature.
  3. Live Synchronization: Enable bi-directional sync to keep both databases in harmony during the migration period with Gluesync’s built-in CDC engine, which leverages MongoDB’s streams and Couchbase Eventing.
  4. Gradual Rollout: Release your updated application with Couchbase Mobile integration. As users update, their data seamlessly transitions to the new backend.
  5. Monitoring and Verification: Use Gluesync’s built-in tools to monitor the migration progress and verify data integrity.
  6. Completion: Once all users have migrated, you can safely decommission the MongoDB Realm instance.

We forgot to mention that all of that it is just a few clicks away, from Gluesync’s web user interface you don’t have to setup/configure anything under the hood.

MongoDB Realm to Couchbase Mobile via Gluesync

Why This Approach Matters

For B2C applications, where user behavior is unpredictable and app updates can’t be enforced instantaneously, a live migration strategy is crucial. Gluesync’s approach allows for:

  • Minimal risk of data loss
  • Uninterrupted user experience
  • Flexibility in migration timelines
  • Reduced stress on development and operations teams

Conclusion

As MongoDB Realm phases out, the transition to alternatives like Couchbase Mobile becomes necessary. With MOLO17’s Gluesync, this migration doesn’t have to be a daunting task. Our platform ensures that your production environment remains stable and your users experience no downtime, all while you upgrade your backend infrastructure.

Ready to experience a seamless migration? Get your free evaluation of MOLO17’s Gluesync today to learn how Gluesync can facilitate your transition from MongoDB Realm to Couchbase Mobile without missing a beat in your production environment: Get Gluesync.

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