Method and apparatus for file system

A system, comprising:

• a data storage system;
• and
• computer-executable program logic encoded in memory of one or more computers enabled to implement a file system comprising at least a first logical storage area and a second logical storage area, wherein a logical block of the first logical storage area being different in size from a logical block of the second logical storage area, wherein the computer-executable program logic is configured for the execution of:
• in response to a request for creating a file, selecting, by a policy engine, a logical storage area for storing the file from the at least first logical storage area and second logical storage area, wherein selection of a logical block size of the selected logical storage area is controlled by configuring the policy engine, wherein variable-length block size is supported in the file system through use of the configurable policy engine;
• storing the logical block size of the selected logical storage area in an inode associated with the file, the inode recording the logical block size for the entire file, including all logical blocks of the file;
• and
• storing the file in the selected logical storage area.

A computer program product for implementing a file system on a data storage system, wherein the file system comprises at least a first logical storage area and a second logical storage area, a logical block of the first logical storage area being different in size from that of a logical block of the second logical storage area, the computer program product comprising:

• a non-transitory computer readable medium encoded with computer-executable code, the code configured to enable the execution of:
• in response to a request for creating a file, selecting, by a policy engine, a logical storage area for storing the file from the at least first logical storage area and second logical storage area, wherein selection of a logical block size of the selected logical storage area is controlled by configuring the policy engine, wherein variable-length block size is supported in the file system through use of the configurable policy engine;
• storing the logical block size of the selected logical storage area in an inode associated with the file, the inode recording the logical block size for the entire file, including all logical blocks of the file;
• and
• storing the file in the selected logical storage area.