Principle:Apache Paimon Table Configuration
| Knowledge Sources | |
|---|---|
| Domains | Configuration, Storage |
| Last Updated | 2026-02-08 00:00 GMT |
Overview
Centralized configuration management for tables via typed option keys that provide type-safe access to configuration parameters across the system.
Description
Table configuration in distributed storage systems requires a robust mechanism to manage diverse settings that control behavior across multiple subsystems including storage, compaction, retention, and catalog operations. A centralized configuration approach consolidates all options into a unified framework where each parameter is defined with explicit type information, default values, and validation rules.
The configuration principle establishes a type-safe layer between user-provided settings and internal system components. Rather than passing raw strings or maps throughout the codebase, typed configuration objects ensure that parameters are validated at the point of access and converted to appropriate types automatically. This reduces runtime errors and makes configuration dependencies explicit in the code.
Configuration parameters are organized hierarchically with namespacing to group related options. Memory sizes, durations, and complex structured options can be parsed from human-readable formats and validated against constraints. The system supports both table-level and catalog-level configurations, with clear precedence rules for option resolution across different scopes.
Usage
Apply this principle when building systems that require extensive configurability across multiple components, where type safety and validation are critical, and where configuration changes must be traceable and auditable. Use typed configuration objects when parameter values need to be shared across different layers of the system while maintaining strong type guarantees.
Theoretical Basis
The configuration management pattern follows a builder-based approach where configuration options are declared with metadata including type, default value, description, and validation constraints. The pattern implements:
Option Definition Phase:
- Define each option with explicit type parameter T
- Associate metadata: key name, default value, description
- Attach validators to enforce constraints
Option Resolution Phase:
- Read configuration from multiple sources (table properties, catalog defaults, system defaults)
- Apply precedence rules to resolve conflicts
- Parse string representations to typed values
- Validate parsed values against constraints
Option Access Phase:
- Retrieve typed value using option key as accessor
- Return cached parsed value or apply lazy parsing
- Throw typed exceptions for invalid configurations
This pattern ensures configuration errors are caught early and provides clear diagnostics when invalid values are encountered. Memory sizes can be specified with units (KB, MB, GB) and durations with time units, all parsed automatically into appropriate internal representations.
Related Pages
Implementation:Apache_Paimon_CoreOptions Implementation:Apache_Paimon_CatalogOptions Implementation:Apache_Paimon_ConfigOption Implementation:Apache_Paimon_ConfigOptions Implementation:Apache_Paimon_Options Implementation:Apache_Paimon_ExpireConfig Implementation:Apache_Paimon_CompressOptions Implementation:Apache_Paimon_RESTCatalogOptions Implementation:Apache_Paimon_StructuredOptionsSplitter Implementation:Apache_Paimon_OptionsUtils Implementation:Apache_Paimon_MemorySize