Real-time
Two-way sync
Changes in Couchbase or Google Cloud Spanner instantly reflect in both systems. No stale data, no manual imports.
Database
Couchbase to Google Cloud Spanner integration — real-time, two-way sync
Keep Couchbase and Google Cloud Spanner in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
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Migrated from MuleSoft
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Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
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Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Couchbase and Google Cloud Spanner
Keep Couchbase and Google Cloud Spanner synchronized in real time, across engines, regions, or services, in one or both directions.
Two databases that must agree is one of the oldest problems in engineering: different engines for different workloads, separate services with overlapping reference data, a migration in flight, or regional instances that share a subset of records. Hand-rolled replication across systems means change capture, conflict handling, and type mapping, all built and maintained by your team.
Stacksync syncs tables or collections between Couchbase and Google Cloud Spanner continuously and bi-directionally, translating types between the two engines and resolving conflicts by rules you configure. Rows written on either side appear on the other within seconds.
Common use cases
- 01 Sync Couchbase JSON documents into Postgres or a warehouse where analysts work with flattened relational tables.
- 02 Stream document mutations via DCP into downstream systems so caches, search indexes, or warehouses stay current.
- 03 Run a two-way sync between Spanner and a SaaS tool so edits made by ops teams land back in the application database.
- 04 Consolidate data from a globally distributed Spanner deployment into regional business systems.
Common sync patterns
Cross-engine sync
Keep the same dataset live in both Couchbase and Google Cloud Spanner, so each workload runs on the engine that suits it.
Migration with zero-downtime cutover
When one database is replacing the other, sync both directions during the transition and switch traffic when ready, without a freeze window.
Shared reference data between services
Services that own separate databases stay consistent on the records they share, without a custom replication layer.
What you can sync between Couchbase and Google Cloud Spanner
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Couchbase objects | Google Cloud Spanner objects | How this pairing syncs | |
|---|---|---|---|
| Global Secondary Indexes Indexes that make SQL++ query-based extraction efficient. | Rows The unit of read and write in each sync cycle, keyed by primary key. | Global Secondary Indexes is specific to Couchbase and Rows to Google Cloud Spanner — each maps to any object or custom field on the other side. | |
| XDCR replications Cluster-to-cluster replication streams, useful context when choosing a sync source cluster. | Interleaved tables Child rows physically co-located with parents; synced as related records. | XDCR replications is specific to Couchbase and Interleaved tables to Google Cloud Spanner — each maps to any object or custom field on the other side. | |
| Full-text search indexes Search indexes over documents, relevant when syncing searchable content. | Secondary indexes Used to make incremental read queries efficient on non-key columns. | Full-text search indexes is specific to Couchbase and Secondary indexes to Google Cloud Spanner — each maps to any object or custom field on the other side. | |
| Buckets Top-level data containers, roughly analogous to a database, that scope replication and memory quotas. | Change streams Capture inserts, updates, and deletes for log-style change data capture. | Buckets is specific to Couchbase and Change streams to Google Cloud Spanner — each maps to any object or custom field on the other side. | |
| Scopes Namespaces inside a bucket used to group collections, similar to schemas. | Views Read-only projections useful for shaping data before it leaves Spanner. | Scopes is specific to Couchbase and Views to Google Cloud Spanner — each maps to any object or custom field on the other side. | |
| Collections Table-like groupings of documents that syncs typically map one-to-one to destination tables. | Databases Top-level containers that scope schema and sync configuration. | Collections is specific to Couchbase and Databases to Google Cloud Spanner — each maps to any object or custom field on the other side. |
How changes propagate between Couchbase and Google Cloud Spanner
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Couchbase Google Cloud Spanner Sub-second propagation
DetectionChanges in Couchbase are captured at the source via change data capture — no polling loop against its API. Database Change Protocol (DCP) streams document mutations.
DeliveryEach detected change is applied to Google Cloud Spanner as a row-level write, with types converted between the two schemas.
Google Cloud Spanner Couchbase Sub-second propagation
DetectionChanges in Google Cloud Spanner are captured at the source via change data capture — no polling loop against its API. Change streams (log-style CDC), or timestamp-based polling queries.
DeliveryEach detected change is applied to Couchbase as a row-level write, with types converted between the two schemas.
Rate-limit considerations
- Couchbase: Throughput is bounded by cluster sizing rather than API rate limits.
- Google Cloud Spanner: Throughput is bounded by the instance's provisioned compute capacity rather than a fixed API quota.
What ships with Couchbase ⇄ Google Cloud Spanner
Connect Couchbase and Google Cloud Spanner for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Couchbase–Google Cloud Spanner connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Couchbase or Google Cloud Spanner data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Couchbase or Google Cloud Spanner record.
Observability
Monitoring
Track your Couchbase ⇄ Google Cloud Spanner sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Couchbase and Google Cloud Spanner.
How the Couchbase and Google Cloud Spanner connectors work
Couchbase
- Integration surface
- SQL++ (N1QL) query service, key-value SDK APIs, and REST management APIs
- Authentication
- Database credentials with role-based access control, typically over TLS
- Change detection
- Database Change Protocol (DCP) streams document mutations; SQL++ polling on document fields as an alternative
- Capabilities
- read · write · CDC
- Rate limits
- Throughput is bounded by cluster sizing rather than API rate limits
Google Cloud Spanner
- Integration surface
- gRPC/REST client API with SQL query surface (GoogleSQL and PostgreSQL-interface dialects)
- Authentication
- Google Cloud IAM (service accounts)
- Change detection
- Change streams (log-style CDC), or timestamp-based polling queries
- Capabilities
- read · write · CDC
- Rate limits
- Throughput is bounded by the instance's provisioned compute capacity rather than a fixed API quota.
How it works
How to connect Couchbase to Google Cloud Spanner — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Couchbase and Google Cloud Spanner with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Couchbase
connected
Google Cloud Spanner
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Couchbase and Google Cloud Spanner objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Couchbase ⇄ Google Cloud SpannerCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Couchbase Google Cloud SpannerCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Couchbase and Google Cloud Spanner integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Couchbase and Google Cloud Spanner: authenticate both systems, choose the objects to sync (such as Couchbase's Global Secondary Indexes and XDCR replications), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Common patterns for Couchbase and Google Cloud Spanner: Cross-engine sync; Migration with zero-downtime cutover; Shared reference data between services. Keep the same dataset live in both Couchbase and Google Cloud Spanner, so each workload runs on the engine that suits it.
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Couchbase: SQL++ (N1QL) query service, key-value SDK APIs, and REST management APIs. Authentication: Database credentials with role-based access control, typically over TLS. Google Cloud Spanner: GRPC/REST client API with SQL query surface (GoogleSQL and PostgreSQL-interface dialects). Authentication: Google Cloud IAM (service accounts). Stacksync manages authentication, retries, and rate limits on both sides.
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Couchbase: SQL++ (N1QL) provides SQL-style querying over JSON documents, including joins across collections, so extraction can be query-shaped rather than key-by-key. Google Cloud Spanner: Change streams record row-level inserts, updates, and deletes and can be consumed through the API for CDC pipelines. Stacksync's field mapping accounts for these differences between Couchbase and Google Cloud Spanner without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Couchbase and Google Cloud Spanner records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Couchbase and Google Cloud Spanner connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Couchbase–Google Cloud Spanner integration in-house.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
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