On 30.11.2019 14:12, Raymond, David wrote:
I am switching to OpenBSD from Linux and I have questions about the
use of softdep and noatime in mounting disks. I have a variety of
systems with a mix of SSDs and rotating disks.
Softdep seems to have some advantages in speeding file access, but it
is not the default. Are there any downsides in using softdep?
https://www.openbsd.org/faq/faq14.html#SoftUpdates
plus 'man mount' option softdep:
(FFS only) Mount the file system using soft dependencies. Instead of
metadata being written immediately, it is written in an ordered fashion
to keep the on-disk state of the file system consistent. This results in
significant speedups for file create/delete operations. This option is
ignored when using the -u flag and a file system is already mounted
read/write.
The options async and softdep are mutually exclusive.
On SSDs in particular, is it worth setting noatime to reduce the
number of disk writes?
Why would you want to do that? Are you using it in other OS?
Then why and where did you get that idea?
Dave Raymond
