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Database ⇄ Data warehouse

Apache Cassandra to Azure Synapse Analytics integration — real-time, two-way sync

Keep Apache Cassandra and Azure Synapse Analytics in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.

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Why teams connect Apache Cassandra and Azure Synapse Analytics

Connect Apache Cassandra and Azure Synapse Analytics with one live, two-way sync: operational rows flow into the warehouse, and computed results flow back where systems can read them fast.

Operational databases and analytical warehouses want the same data at different moments. Analysts want Apache Cassandra's rows in Azure Synapse Analytics, current and joinable, without a change-data-capture pipeline to maintain. Engineers want the outputs of warehouse work, such as aggregates, features, and segments, available in Apache Cassandra where the services that read from it get them at normal query latency.

Stacksync covers both directions with one connection. Tables or collections in Apache Cassandra sync into Azure Synapse Analytics in real time, and result tables in Azure Synapse Analytics sync back into Apache Cassandra, with schema and type mapping between the two systems handled for you.

Common use cases

  • 01 Sync curated Synapse views into an operational Postgres or Azure SQL database that applications can query cheaply.
  • 02 Consolidate SaaS data alongside lake data so analysts join both through one SQL surface.
  • 03 Sync customer profile data between Cassandra and a CRM so operational apps and sales tools agree.
  • 04 Write attributes computed elsewhere (scores, preferences) back into Cassandra tables serving low-latency reads.

Common sync patterns

Offload heavy reads

Point analytical queries at the synced copy in Azure Synapse Analytics and keep Apache Cassandra focused on its operational workload.

Operational data in the warehouse, minus the pipeline

Rows from Apache Cassandra land in Azure Synapse Analytics as they change, replacing hand-built CDC and batch extract jobs.

Serve warehouse results at database speed

Aggregates or model outputs computed in Azure Synapse Analytics sync into Apache Cassandra, where whatever reads from that database gets them without querying the warehouse.

What you can sync between Apache Cassandra and Azure Synapse Analytics

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.

Apache Cassandra objects Azure Synapse Analytics objects How this pairing syncs
Materialized Views Server-maintained denormalized views; considered experimental and disabled by default in recent releases. Materialized views Precomputed aggregates that speed reads of frequently synced result sets. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
User-Defined Types Composite column types that syncs must flatten or map to structured fields. External tables Tables over files in the data lake, queried through serverless SQL and often read-only in syncs. User-Defined Types is specific to Apache Cassandra and External tables to Azure Synapse Analytics — each maps to any object or custom field on the other side.
Collections List, set, and map columns handled with type-aware field mapping. Views Curated projections used when downstream tools should not read base tables directly. Collections is specific to Apache Cassandra and Views to Azure Synapse Analytics — each maps to any object or custom field on the other side.
Counters Increment-only counter columns, usually read-only in syncs. Schemas Namespaces that separate staging, integration, and presentation layers. Counters is specific to Apache Cassandra and Schemas to Azure Synapse Analytics — each maps to any object or custom field on the other side.
Keyspaces Top-level namespaces with replication settings that scope a sync connection. SQL pools Dedicated or serverless compute contexts that determine how and where queries run. Keyspaces is specific to Apache Cassandra and SQL pools to Azure Synapse Analytics — each maps to any object or custom field on the other side.
Tables Wide-column tables addressed by partition key, the unit of row-level sync. Tables (dedicated SQL pool) Distributed warehouse tables that serve as sync destinations for analytics workloads. Tables is specific to Apache Cassandra and Tables (dedicated SQL pool) to Azure Synapse Analytics — each maps to any object or custom field on the other side.

How changes propagate between Apache Cassandra and Azure Synapse Analytics

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.

Apache Cassandra Azure Synapse Analytics Sub-second propagation

DetectionChanges in Apache Cassandra are captured at the source via change data capture — no polling loop against its API. Commit-log based CDC on tables with CDC enabled, or polling using writetime metadata and timestamp columns.

DeliveryEach detected change is applied to Azure Synapse Analytics as a row-level write, with types converted between the two schemas.

Azure Synapse Analytics Apache Cassandra Interval-based propagation

DetectionStacksync polls Azure Synapse Analytics for changes on an incremental schedule, reading only records changed since the previous pass. Polling on watermark columns.

DeliveryEach detected change is written to Apache Cassandra through its API, with automatic retries and rate-limit backoff.

Rate-limit considerations

  • Apache Cassandra: No API quotas; throughput is governed by cluster capacity and consistency-level choices.
What ships with Apache Cassandra ⇄ Azure Synapse Analytics

Connect Apache Cassandra and Azure Synapse Analytics for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Apache Cassandra–Azure Synapse Analytics connection.

Real-time

Two-way sync

Changes in Apache Cassandra or Azure Synapse Analytics instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Apache Cassandra or Azure Synapse Analytics 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 Apache Cassandra or Azure Synapse Analytics record.

Observability

Monitoring

Track your Apache Cassandra ⇄ Azure Synapse Analytics sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Apache Cassandra and Azure Synapse Analytics.

How the Apache Cassandra and Azure Synapse Analytics connectors work

Apache Cassandra

Integration surface
CQL over the Cassandra native binary protocol
Authentication
Database credentials (password authenticator); TLS and role-based grants where configured
Change detection
Commit-log based CDC on tables with CDC enabled, or polling using writetime metadata and timestamp columns
Capabilities
read · write · CDC
Rate limits
No API quotas; throughput is governed by cluster capacity and consistency-level choices

Azure Synapse Analytics

Integration surface
SQL wire protocol (TDS) with T-SQL for SQL pools; additional Spark and pipeline surfaces exist but syncs use the SQL endpoint
Authentication
SQL authentication or Microsoft Entra ID
Change detection
Polling on watermark columns; Synapse SQL pools do not expose log-based CDC for downstream consumers
Capabilities
read · write
How it works

How to connect Apache Cassandra to Azure Synapse Analytics — 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.

  1. 01

    Connect your apps

    Authenticate Apache Cassandra and Azure Synapse Analytics with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Apache Cassandra connected
    Azure Synapse Analytics connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Apache Cassandra and Azure Synapse Analytics 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Apache Cassandra ⇄ Azure Synapse Analytics
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Apache Cassandra Azure Synapse Analytics
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Apache Cassandra and Azure Synapse Analytics integration FAQ

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.

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→ 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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 465 integrations available for Apache Cassandra and Azure Synapse Analytics.

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