On Fri, 21 Oct 2022, Kirk McKusick wrote:
The branch main has been updated by mckusick:
URL:
https://cgit.FreeBSD.org/src/commit/?id=243a0eda9ace2f4d9cdd5291c352816ddc9ebdb2
commit 243a0eda9ace2f4d9cdd5291c352816ddc9ebdb2
Author: Kirk McKusick <[email protected]>
AuthorDate: 2022-10-21 18:00:00 +0000
Commit: Kirk McKusick <[email protected]>
CommitDate: 2022-10-21 18:00:00 +0000
Increase the maximum size of the journaled soft-updates journal.
The size of the journaled soft-updates journal should be big enough
to hold two minutes of filesystem metadata-update activity. The
maximum size of the soft updates journal was set in the 1990s. At
the time it was assummed that disk arrays would top out at 16 drives
and disk writes per drive would top out at 500 per second. Today's
I/O subsystems are considerably bigger and faster than those limits.
Thus this delta removes the hard upper limit and lets tunefs(8) and
newfs(8) set the upper bound based on the size of the filesystem and
its cylinder groups.
Do you have some examples for common disk sizes how big the journal will be
approx?
I am just wondering for example how's 1TB vs. 22TB?
You may remember that I had tried the 512MB journal before which then
had noticeable delays during unmount. Can we get that big now?
--
Bjoern A. Zeeb r15:7
