Patent ID: 9122408
Filing Date: 2015-09-01
Classification: G06F

Abstract:
1. A method, in a data processing system, for storing data to a storage system comprising a set of one or more solid state storage devices and a set of non-solid state storage devices, comprising: receiving a request to write data to the storage system; writing the data to the set of one or more solid state storage devices in response to receiving the request; writing a mirror copy of the data to reserved portions of the set of non-solid state storage devices in response to receiving the request; determining a frequency of access of portions of data stored in the one or more solid state storage devices; and migrating at least one portion of data, in the portions of data stored in the one or more solid state storage devices to a non-reserved portion of the set of non-solid state storage devices in response to determining that the at least one portion of data is infrequently accessed, wherein portions of the data stored in the one or more solid state storage devices determined to be frequently accessed data are maintained in the one or more solid state storage devices after migration of the at least one portion of data.