Methods And Systems For Improving Storage Journaling

Abstract

Techniques for improving storage journaling are disclosed. In some embodiments, the techniques may be realized as a method for improving storage journaling including recording to a journal a count of valid blocks in a first chunk of storage in flash memory, receiving a request to write a second chunk to the flash memory, determining, using a controller, whether the count of valid blocks in the first chunk is less than a specified threshold, and in the event the number of valid blocks in the first chunk is less than the specified threshold, writing the second chunk to a location of the first chunk of storage in the flash memory.

Description

technical field [0001] The present disclosure relates to methods and systems for improving storage logs. Background technique [0002] A journaling file system can track changes before committing them to the file system. Such a log reduces the risk of data corruption or loss in the event of a system crash or error. Logs typically have a finite size. Logs can be written from the beginning of a space (eg, a file) to the end of the space, and wrap around to the beginning of the space once the end is reached. Existing logged data layouts suffer from the problem that useful data must be rewritten when the log wraps around and reaches a point where existing data exists. Remaining useful data must be discarded or rewritten into new locations, which causes "write amplification" and degrades performance (since writes are typically slower than reads). Contents of the invention [0003] A technique for improving storage logs is disclosed. In some embodiments, these techniques ma...

AI Technical Summary

Problems solved by technology

The remaining useful data must be discarded or rewritten into a new location, which causes "write amplification" and reduces performance (since writes are typically slower than reads)

Images