README

A Symfony Bundle designed to solve cache hotkey issues by automatically distributing hot keys across multiple sub-keys, effectively preventing a single cache node from being overloaded.

Features

• Automatically detects hot keys (keys starting with hotkey_)
• Replicates hot key content to multiple sub-keys for load balancing
• Randomly selects a sub-key for reads
• Supports cache size monitoring and alerting
• Supports cache tag invalidation logging

Installation

Requirements

• PHP 8.1 or higher
• Symfony 6.4 or higher
• PSR-3 Logger
• Symfony Cache component

Composer Install

composer require tourze/symfony-cache-hotkey-bundle

Quick Start

Marking a Hot Key

Simply add the hotkey_ prefix to your cache key:

// Normal cache usage
$cache->get('normal_key', fn() => 'value');

// Hot key cache usage
$cache->get('hotkey_popular_data', fn() => 'value');

This bundle will automatically:

1. Replicate the hot key content to 10 sub-keys (hotkey_popular_data_0_split to hotkey_popular_data_9_split)
2. Randomly select a sub-key when reading
3. Clean up all sub-keys when the main key is deleted

Main Configuration (Environment Variables)

CACHE_MARSHALLER_WARNING_VALUE_SIZE=1048576 # Cache serialization warning threshold (bytes)
CACHE_MARSHALLER_WARNING_DEMO_SIZE=400      # Cache content preview size (bytes)
CACHE_INVALIDATE_TAG_LOG=false              # Enable cache tag invalidation logging

Documentation

• Supports cache tag invalidation with optional logging (CACHE_INVALIDATE_TAG_LOG)
• Automatically logs a warning if cache value size exceeds threshold, helping you optimize data structures

Performance Tips

• For high concurrency scenarios, only use the hotkey_ prefix for truly hot data to avoid unnecessary sharding
• You can customize the number of shards by adjusting the MAX_KEY constant

Contributing

Issues and PRs are welcome. Please follow PSR coding standards and ensure PHPUnit tests pass before submitting.

License

MIT License © Tourze

Changelog

See Releases for details

This Bundle will automatically:

1. Replicate hot key content across 10 sub-keys (from hotkey_popular_data_0_split to hotkey_popular_data_9_split)
2. Randomly select a sub-key when reading
3. Clean up all sub-keys when the main key is deleted

要求 | Requirements

• PHP 8.1+
• Symfony 6.4+
• PSR-3 Logger
• Symfony Cache Component

License

MIT License