bigdata（bigdata 分析）

BigData

A comprehensive data processing toolkit for ingesting, transforming, querying, filtering, aggregating, and managing data workflows — all from the command line with local timestamped log storage.

Commands

Each data command (ingest, transform, query, etc.) works the same way:

• With arguments: saves the entry with a timestamp to its dedicated .log file and records it in the activity history
• Without arguments: displays the 20 most recent entries from that command's log

Data Storage

All data is stored locally in plain-text log files:

~/.local/share/bigdata/
├── ingest.log          # Ingested data entries
├── transform.log       # Transformation records
├── query.log           # Query log
├── filter.log          # Filter operations
├── aggregate.log       # Aggregation records
├── visualize.log       # Visualization tasks
├── export.log          # Export operations
├── sample.log          # Sampling records
├── schema.log          # Schema definitions
├── validate.log        # Validation checks
├── pipeline.log        # Pipeline configurations
├── profile.log         # Profiling results
└── history.log         # Unified activity log with timestamps

Each entry is stored as YYYY-MM-DD HH:MM|<value> for easy parsing and export.

Requirements

• Bash 4.0+ (uses set -euo pipefail)
• Standard UNIX utilities: date, wc, du, grep, head, tail, cat
• No external dependencies or API keys required
• Works offline — all data stays on your machine

When to Use

1. Data pipeline tracking — Record each step of a multi-stage data workflow (ingest → transform → validate → export) with full timestamps for audit trails
2. Quick data logging — Capture observations, measurements, or notes about datasets directly from the terminal without opening a separate app
3. Schema management — Keep track of schema definitions, changes, and validation rules as your data evolves over time
4. Data quality monitoring — Log validation checks and profiling results to build a history of data quality metrics
5. Workflow documentation — Use search and recent commands to review what data operations were performed, when, and in what order

Examples

Log a complete data workflow

# Ingest raw data
bigdata ingest "customer_orders_2024.csv — 1.2M rows loaded"

# Transform it
bigdata transform "normalize dates to ISO-8601, trim whitespace, deduplicate"

# Validate the output
bigdata validate "all required fields present, no nulls in customer_id"

# Record the schema
bigdata schema "orders: id(int), customer_id(int), amount(decimal), date(date)"

# Export when ready
bigdata export "final dataset pushed to analytics warehouse"

Search and review activity

# Search across all logs for a keyword
bigdata search "customer"

# Check overall statistics
bigdata stats

# View recent activity across all commands
bigdata recent

# Health check
bigdata status

Pipeline and profiling

# Define a pipeline
bigdata pipeline "daily-etl: ingest → clean → validate → load — runs at 02:00 UTC"

# Profile a dataset
bigdata profile "users table: 500K rows, 12 columns, 0.3% nulls in email field"

# Sample data for testing
bigdata sample "random 10% sample from transactions for QA testing"

# Record an aggregation
bigdata aggregate "monthly revenue by region — Q1 totals computed"

Filter and query tracking

# Log a filter operation
bigdata filter "removed records older than 2020-01-01, kept 850K of 1.2M rows"

# Track a query
bigdata query "SELECT region, SUM(revenue) FROM orders GROUP BY region"

# Log a visualization
bigdata visualize "bar chart: monthly revenue trend, exported as PNG"

Output

All commands print confirmation to stdout. Data is persisted in ~/.local/share/bigdata/. Use bigdata stats for a summary or bigdata search <term> to find specific entries across all logs.

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