Abstract
The log-structured file system (LFS) writes all modifications to storage sequentially with append-only logging scheme. This characteristic of LFS is very advantageous to flash storages since the flash memory does not permit in-place overwrite. However, LFS has a high garbage collection (GC) overhead. In particular, under the lazy metadata update scheme, each GC process should invoke the high-cost checkpointing which flushes all the dirty metadata and normal data to storage. The long GC latency will degrade the response times of user requests. In this paper, we propose a GC journaling technique, which journals only the file system changes relevant to the GC process without invoking the high cost checkpointings.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
