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cassandra-expert
Design query-first Apache Cassandra schemas, systematically diagnose cluster issues like latency and node failures using the USE method, optimize performance with vnodes tuning and compaction strategies for 3.x-5.0, and get expert CQL analysis and operational guidance.
What's Inside
Skills4
data-model
/data-model
Data modeling and schema design for Apache Cassandra. Use when designing tables, choosing partition keys, modeling time-series data, or reviewing existing schemas.
diagnose
/diagnose
Systematic troubleshooting for Apache Cassandra clusters. Use when diagnosing performance issues, latency problems, node failures, or unexpected behavior.
expert
/expert
General Apache Cassandra expertise for questions, CQL analysis, best practices, vnodes, and guidance. Use for general Cassandra questions that don't fit diagnose, optimize, or data-model.
optimize
/optimize
Performance optimization for Apache Cassandra clusters. Use when tuning configuration, improving throughput, reducing latency, optimizing resource usage, or configuring vnodes/num_tokens.
README
Rustyrazorblade Skills
A Claude Code plugin marketplace by Jon Haddad.
Installation
/plugin marketplace add rustyrazorblade/skills
Available Plugins
cassandra-expert
Expert guidance for Apache Cassandra development and operations.
/plugin install cassandra-expert@rustyrazorblade-plugins
Skills
| Skill | Purpose |
|---|---|
/cassandra-expert:diagnose | Systematic troubleshooting using USE method, outlier analysis, double loop learning |
/cassandra-expert:optimize | Performance tuning, configuration analysis, JVM settings, compaction strategies |
/cassandra-expert:data-model | Schema design, partition keys, time-series modeling, query patterns |
/cassandra-expert:expert | General Cassandra questions, CQL analysis, best practices |
Usage Examples
Diagnose - Troubleshooting Issues
/cassandra-expert:diagnose Read latencies spiking on some nodes but not others
/cassandra-expert:diagnose Compaction can't keep up with writes
Optimize - Performance Tuning
/cassandra-expert:optimize Review my cassandra.yaml settings
/cassandra-expert:optimize What compaction strategy should I use?
Data Model - Schema Design
/cassandra-expert:data-model Design schema for user activity tracking
/cassandra-expert:data-model How should I model time-series data with 90-day retention?
Expert - General Questions
/cassandra-expert:expert What consistency level should I use for multi-DC?
/cassandra-expert:expert Review this CQL query for anti-patterns
Problem-Solving Methodology
- Double Loop Learning - Goes beyond immediate fixes to identify root causes and prevent recurrence
- USE Method - Systematically analyzes Utilization, Saturation, and Errors for CPU, memory, disk, network, storage, and thread pools
- Outlier Analysis - Compares nodes to identify anomalies in latency, resource usage, and behavior
- Configuration Analysis - Reviews system settings, cassandra.yaml, JVM settings, and per-table configurations
Key Recommendations
Opinionated guidance based on real-world experience:
- num_tokens: Use 1 or max 4. Higher is always worse.
- Compaction: UCS for Cassandra 5.0+. Never use STCS.
- Read-ahead: Disable it. One of the worst settings you can have enabled.
- Partitions: Keep under 10MB. No downside to smaller partitions.
- Row cache: Keep disabled. Rarely beneficial.
License
Apache 2.0
Stats
Version0.3.0
LanguagePython
Stars38
Forks7
MaintenanceExcellent
LicenseApache-2.0
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