Apparatus and method for meeting performance metrics for users in file systems

A method, comprising:

• using at least one processor for managing a plurality of data blocks of a file system using a first storage service and a second storage service, wherein the first storage service has a lower storage cost and a higher input-output cost than the second storage service, wherein ones of the data blocks stored using the second storage service have associated therewith an expected storage duration indicative of a length of time for which the ones of the data blocks are to be stored using the second storage service, wherein managing the data blocks of the file system comprises:
• determining an expected hit rate of the second storage service, wherein the expected hit rate of the second storage service is based on at least one performance metric associated with the file system;
• monitoring a current hit rate of the second storage service;
• and
• modifying the expected storage duration of the ones of the data blocks stored using the second storage service based on a comparison of the expected hit rate of the second storage service and the current hit rate of the second storage service.

An apparatus, comprising:

• a processor and a memory communicatively connected to the processor, wherein the processor is configured to manage a plurality of data blocks of a file system using a first storage service and a second storage service, wherein the first storage service has a lower storage cost and a higher input-output cost than the second storage service, wherein ones of the data blocks stored using the second storage service have associated therewith respective expected storage durations indicative of respective lengths of time for which the ones of the data blocks stored using the second storage service are to be stored using the second storage service, wherein the processor is configured to:
• determine an expected hit rate of the second storage service, wherein the expected hit rate of the second storage service is based on at least one performance metric associated with the file system;
• monitor a current hit rate of one of the data blocks stored using the second storage service;
• and
• modify the expected storage duration of the one of the data blocks based on a comparison of the expected hit rate of the second storage service and the current hit rate of the one of the data blocks.

A method, comprising:

• using at least one processor for managing a plurality of data blocks of a file system using a first storage service and a second storage service, wherein the data blocks of the file system are stored using a first storage service and a second storage service, wherein the first storage service has a lower storage cost and a higher input-output cost than the second storage service, wherein ones of the data blocks stored using the second storage service have associated therewith respective expected storage durations indicative of respective lengths of time for which the ones of the data blocks are to be stored using the second storage service, wherein managing the data blocks of the file system comprises:
• determining an expected hit rate of the second storage service, wherein the expected hit rate of the second storage service is based on at least one performance metric associated with the file system;
• monitoring a current hit rate of one of the data blocks;
• and
• modifying the expected storage duration of the one of the data blocks based on a comparison of the expected hit rate of the second storage service and the current hit rate of the one of the data blocks.