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Apache Cassandra vs Microsoft SQL Server

Side-by-side comparison of Apache Cassandra and Microsoft SQL Server. Data-driven analysis for CTOs and engineering leaders.

Technical Profile

Apache Cassandra

Scalability
very high
Performance
very high
Learning Curve
steep
Maturity
mature
Languages: Java

Microsoft SQL Server

Scalability
very high
Performance
very high
Learning Curve
moderate
Maturity
mature
Languages: T-SQL, SQL

When to Use

Apache Cassandra

  • +Need massive write throughput
  • +Multi-datacenter deployment
  • +Time-series data
  • +Always-on availability

Avoid Apache Cassandra when

  • -Complex queries needed
  • -Small team
  • -Limited ops expertise

Microsoft SQL Server

  • +Microsoft stack
  • +Azure cloud
  • +Windows servers
  • +BI workloads

Avoid Microsoft SQL Server when

  • -Linux environment
  • -Budget constraints
  • -Open-source preference

Compliance & Security

Apache Cassandra

SOC 2GDPRHIPAAPCI-DSS

Security Features

EncryptionAudit LogsRBACMFA

Microsoft SQL Server

SOC 2GDPRHIPAAPCI-DSS

Security Features

EncryptionAudit LogsRBACMFA

Operations

Apache Cassandra

Maintenance
high
Monitoring
high
Backup/Recovery
moderate
Hosting: self-hosted, cloud, managed

Microsoft SQL Server

Maintenance
medium
Monitoring
medium
Backup/Recovery
moderate
Hosting: self-hosted, cloud, managed

Frequently Asked Questions

How does scalability compare between Apache Cassandra and Microsoft SQL Server?

Apache Cassandra offers very-high scalability, while Microsoft SQL Server offers very-high scalability. Consider your expected traffic and data volume when choosing.

Which has the easier learning curve: Apache Cassandra or Microsoft SQL Server?

Apache Cassandra has a steep learning curve, while Microsoft SQL Server has a moderate learning curve. Factor in your team's existing skills and onboarding timeline.

What are the pricing differences between Apache Cassandra and Microsoft SQL Server?

Apache Cassandra uses a free pricing model with a free tier. Microsoft SQL Server uses a per-seat pricing model starting at $900/year with a free tier. Evaluate total cost of ownership including operational overhead.

Which option is better for compliance: Apache Cassandra or Microsoft SQL Server?

Apache Cassandra supports SOC 2, GDPR, HIPAA, PCI-DSS. Microsoft SQL Server supports SOC 2, GDPR, HIPAA, PCI-DSS. Always verify current certifications directly with the vendor.

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