Patent ID: 10430087

Abstract:
A method for managing write requests in a storage system, the method may include receiving, by a receiving control node out of a group of control nodes of the storage system, a write request for writing a data unit to the storage system; storing the data unit in a first layer storage that is shared among the control nodes of the group, by the receiving control node; retrieving the data unit from the first layer storage and destaging the data unit to a second layer storage by a destaging control node that belongs to the group and is responsible for destaging the data unit; wherein at a time of the destaging of the data unit to the second layer storage another control node of the group is responsible for destaging another data unit to the second layer storage; wherein the storing of the data unit in the first layer storage is faster than the destaging of the data unit to the second layer storage; and when the destaging control node differs from the receiving control node then each one of the receiving and the storing is not preceded by notifying the destaging control node about the receiving and the storing, respectively.