HarborCache – Object Cache with Redis

HarborCache provides persistent Redis object caching with a dashboard, local analytics, connection settings and scoped cache controls. It was developed around the day-to-day needs of the author’s websites, with its own administration and cache-management workflow.

It requires a separately operated Redis server. No account, subscription or license key is required. Request analytics stay in your configured Redis namespace. External tracing is disabled by default. See docs/FEATURES.md for implemented behavior, verified configurations and deployment acceptance gates.

Features include persistent caching through Predis, PhpRedis, Relay or Credis; multisite group scopes; bounded TTLs; atomic namespace invalidation; bulk cache operations; typed values; optional serialization and compression; optional split-alloptions storage; request key prefetching; local sampled analytics; WP-CLI; protected administration forms; Site Health; Query Monitor; and Debug Bar support.

Advanced additions include bounded background reclamation, exact integer counters, safe-read retries/backoff, replica/Sentinel/cluster read routing, logging/tracing adapters, custom cache/connector factories, analytics retention/count/flush-persistence controls and shared-server capacity reporting. See docs/ADVANCED.md and the feature ledger for native-extension acceptance gates and API differences.

The dashboard includes Status, Analytics, Settings, Cache and Diagnostics. Configuration is saved to a guarded PHP file in wp-content. Configuration constants take precedence. Passwords and cached values are excluded from diagnostic exports.

HarborCache connects to the Redis endpoint you configure. It does not contact the original plugin vendor. Optional tracing must be explicitly configured and uses your host application’s New Relic or OpenTelemetry integration and destination. Plugin-provided spans contain command names, timings and bounded datastore metadata; they omit cached keys, values, credentials and endpoint details. Configure retention and privacy in your provider or collector. No tracing SDK, remote account or external destination is enabled by default.

Redis is a registered trademark of Redis Ltd. No affiliation or endorsement is implied.