Method and system for improved storage of logs

Abstract

A technique for improving storage logs is disclosed. In some embodiments, the technique may be implemented as a method for improving a storage log, comprising: logging a count of valid blocks in a first large block of a storage area in a flash memory; receiving a write to the flash memory A request for a second chunk; using the controller to determine whether the count of valid chunks in the first chunk is below a specified threshold; and if the number of valid chunks in the first chunk is below a specified threshold, send a request to The location of the first large block of the storage area in the flash memory is written into the second large block.

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)

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