Hi.
I solved this problem successfully.
I have to mount a folder in Amazon S3 to my local PC. So, I code function fuse_operations.read myself. When this function was called, it finds this file in cache data. If cache hit, it will read data in cache and return for FUSE. If don't, it will download this file in Amazon S3.
You can view sample code with key word: s3fs.
Thank for reading.