Judgments must take into accounts users
Judgments must take into accounts users
Posted Apr 2, 2009 12:01 UTC (Thu) by renox (guest, #23785)In reply to: Where competence meets judgment by bojan
Parent article: From ext3 to ext4: An Interview with Theodore Ts'o (Linux Magazine)
Even the best fsync on earth can take a long time if there's a lot of data to be written on the disk, so fsync is always a 'potentially time consuming' operation.
Which means that whatever the FS if you must use fsync to have the correct behaviour then to avoid showing freeze to the user you must go to the dreaded multi-threaded world.
Sure the FS can provide a (Linux specific) write barrier, but it's very likely that nobody will use this.
Which means that whatever the FS if you must use fsync to have the correct behaviour then to avoid showing freeze to the user you must go to the dreaded multi-threaded world.
Sure the FS can provide a (Linux specific) write barrier, but it's very likely that nobody will use this.
OR the other possibility is to use a FS which does the operations in-order which simplify a lot the application programming.
There may be a small performance cost, somehow I doubt that users will care.