Softupdates
•Three
traditional file system mount types:
1.Asynchronous data and meta-data writes
(Linux default). Very fast, but
unsafe
2.Asynchronous data, synchronous
meta-data writes (FreeBSD default).
Slower, but safer
3.Journaling. Can be very fast, but the
code is complicated.
•Softupdates
is a mechanism for ordering meta-data writes
•All
the speed of (1), with the safety of (2)
•Softupdates
and journalling have different results on different data sets