Patent ID: 9424263
Filing Date: 2016-08-23
CPC Classification: G06F

Claim Text:
1. A file server comprising: a controller managing (i) a plurality of file systems and (ii) a storage pool provided with a plurality of storage tiers, a higher storage tier of the plurality of storage tiers having a first characteristic and a lower storage tier of the plurality of storage tiers having a second characteristic different from the first characteristic of the higher storage tier, wherein the controller is configured to store user data associated with a user file handled by a file system of the plurality of file systems into the lower storage tier of the storage pool and to store metadata for managing the user file into the higher storage tier of the storage pool based on the type of the storage tier and the type of the user data or the metadata of the user file, wherein the storage tiers include at least one metadata region predominantly used for storing metadata and at least one user data region predominantly used for storing user data, and wherein the controller stores system metadata associated with a file system of the plurality of file systems in blocks of storage associated with the at least one metadata region, and, for each of a first number of user files associated with said file system of the plurality of file systems, the controller stores user metadata for the user file in blocks of storage associated with the at least one metadata region and storing user data for the user file in blocks of storage associated with the at least one user data region.