Why not just sync the data change and sync the metadata changes only to a write-... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

jeffdavis on Oct 2, 2012 | parent | context | favorite | on: Linux 3.6 released

Why not just sync the data change and sync the metadata changes only to a write-ahead log? Or if the data is logged also, you only need to sync the log.

I assume btrfs uses a log, right?

rogerbinns on Oct 2, 2012 [–]

A tree is the main data structure. The inspiration is this pdf http://www.usenix.org/events/lsf07/tech/rodeh.pdf

There is a log to help with fsyncs. http://en.wikipedia.org/wiki/Btrfs

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact