This topic describes the cache replacement policies of file gateways.

A file gateway determines whether to replace the cached data depending on the cache usage, as described in the following rules.

  • When the cache usage is lower than 60%, no cache replacement policy is triggered.
  • When the cache usage is between 60% and 80%, cache replacement policies are triggered. Cached data will be replaced until the cache usage drops below 60%.
  • When the cache usage exceeds 80%, the file gateway quickly replaces cached data, and restricts the amount of data written from the frontend to reserve cache capacity.