Method and system for managing wear-level aware file systems

A non-transitory computer readable medium comprising a plurality of executable instructions for, retrieving a logical block, wherein the plurality of executable instructions comprises instructions to:

• receive a request to read the logical block;
• obtain metadata associated with the logical block, wherein the metadata comprises:
• a replication type used to store the logical block;
• physical block locations in a storage pool for each physical block associated with the logical block, wherein each physical block location specifies one of a plurality of storage devices in the storage pool;
• select a first set of physical block locations using a wear-level selection policy, wherein selecting the first set of physical locations comprises:
• identifying the first set of physical block locations using the metadata, wherein the physical blocks at the first set of physical block locations combine to form the logical block,
• determining a wear cost to read each of the physical blocks located at the first set of physical block locations to obtain a first plurality of wear costs,
• combining the first plurality of wear costs to obtain a first aggregate wear cost,
• identifying a second set of physical block locations using the metadata, wherein the physical blocks at the second set of physical block locations combine to form the logical block,
• determining a wear cost to read each of the physical blocks located at the second set of physical block locations to obtain a second plurality of wear costs,
• combining the second plurality of wear costs to obtain a second aggregate wear cost, and
• selecting the first set of physical block locations based on the first aggregate wear cost, the second aggregate wear cost, and the wear-level selection policy;
• generate a first set of I/O requests, wherein each I/O request specifies one of the first set of physical block locations;
• issue a first set of I/O requests;
• receive the first set of physical blocks in response to the first set of I/O requests;
• and
• construct the logical block using the first set of physical blocks.