# Properties

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**This is the manual for older MicroStream versions (Version < 5.0).**

**The new documentation (Version >= 5.0) is located at:**

[https://docs.microstream.one/](https://docs.microstream.one/manual)
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These are the available properties of the `CacheConfiguration` type. The names are used accordingly in the external configuration files. They can be found as constants in `CacheConfigurationPropertyNames`.

| Property                         | Description                                                                                                                                                                                 |
| -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| keyType                          | Determines the required type of keys for the Cache.                                                                                                                                         |
| valueType                        | Determines the required type of values for the Cache.                                                                                                                                       |
| storageConfigurationResourceName | Path for the  [storage configuration](https://manual.docs.microstream.one/4.0/data-store/configuration#external-configuration) for the backing store.                                       |
| cacheLoaderFactory               | A CacheLoader should be configured for "Read Through" caches to load values when a cache miss occurs.                                                                                       |
| cacheWriterFactory               | A CacheWriter is used for write-through to an external resource.                                                                                                                            |
| expiryPolicyFactory              | Determines when cache entries will expire based oncreation, access and modification operations.                                                                                             |
| evictionManagerFactory           | Clears cache entries using a policy. Works interval-based or on entry creation.                                                                                                             |
| readThrough                      | When in "read-through" mode, cache misses that occur due to cache entries not existing as a result of performing a "get" will appropriately cause the configured CacheLoader to be invoked. |
| writeThrough                     | When in "write-through" mode, cache updates that occur as a result of performing "put" operations will appropriately cause the configured CacheWriter to be invoked.                        |
| storeByValue                     | When a cache is storeByValue, any mutation to the key or value does not affect the key of value stored in the cache.                                                                        |
| statisticsEnabled                | Checks whether statistics collection is enabled in this cache.                                                                                                                              |
| managementEnabled                | Checks whether management is enabled on this cache.                                                                                                                                         |