Write caching for synchronous writes

Write caching for synchronous writes costs cluster resources, including a negligible amount of storage space. Although it is not as fast as write caching with asynchronous writes, unless cluster resources are extremely limited, write caching with synchronous writes is faster than writing to the cluster without write caching.

Write caching does not affect the integrity of synchronous writes; if a cluster or a node fails, none of the data in the write-back cache for synchronous writes is lost.