1. A method for managing storage devices, comprising: receiving, at a first node, a write request to write data to a relatively slow back-end storage tier in a storage system, the storage system further comprising a relatively fast storage tier comprising SSDs; initially writing the write request to write data to the relatively slow back-end storage tier as temporary data to a first operation log on the first node at the relatively fast storage tier, the temporary data being distributed across multiple nodes by replicating the first operation log on the first node to one or more other operation logs on other nodes based on a replication factor; sending a confirmation of the write request to an originator of the write request at a point in time where data to be committed in the write request has not been committed to the relatively slow back-end storage tier; and transferring contents of the operation log to the relatively slow back-end storage tier.