tmplog mount option

In tmplog mode, the effects of system calls have persistence guarantees that are similar to those in delaylog mode. In addition, enhanced flushing of delayed extending writes is disabled, which results in better performance but increases the chances of data being lost or uninitialized data appearing in a file that was being actively written at the time of a system failure. This mode is only recommended for temporary file systems. Fast file system recovery works with this mode.


The term "effects of system calls" refers to changes to file system data and metadata caused by the system call, excluding changes to st_atime.

See the stat(2) manual page.