Question 1

How to use Metaphore with Laravel or Symfony?

Accepted Answer

Integrate Metaphore by initializing its Cache with a compatible store (e.g., MemcachedStore) and wrapping framework cache calls, but it requires custom setup as it's not a native package for these frameworks. You may need to adapt it to fit their caching interfaces.

Question 2

Metaphore vs Redis built-in cache stampede prevention?

Accepted Answer

Metaphore provides a semaphore-based approach with stale serving in PHP, while Redis offers features like SETNX for locks. Metaphore is more specialized for PHP applications and allows separate lock stores, but Redis might be sufficient for simple cases without extra library overhead.

Question 3

How to set up separate lock and value stores in Metaphore?

Accepted Answer

Initialize a value store (e.g., MemcachedStore) and a lock manager with a custom lock store (e.g., using MySQL with GET_LOCK), then pass both to the Cache constructor, as detailed in the README's 'Value store vs lock store' section.

Question 4

What happens if cache generation fails during a lock?

Accepted Answer

If cache generation fails, the lock will expire based on the lock TTL, and subsequent requests might retry. Metaphore doesn't have built-in error recovery, so you need to handle failures in your callable or via event hooks.

Question 5

Does Metaphore work with Redis as a cache store?

Accepted Answer

Yes, Metaphore supports Redis through included stores like RedisStore, but you must ensure Redis is installed and configured, and use it via the ValueStoreInterface as shown in the tests.

Question 6

How to tune TTL settings for high-traffic sites?

Accepted Answer

Use the Ttl object to adjust grace periods and lock durations; for example, increase lock TTL for slow generators and grace TTL to serve stale content longer, but monitor to avoid serving outdated data excessively.

Metaphore

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