Date: Sat, 22 Oct 2022 19:55:48 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: Kirk McKusick <mckusick@FreeBSD.org> Cc: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: git: 243a0eda9ace - main - Increase the maximum size of the journaled soft-updates journal. Message-ID: <269os56-632-9n9-o0qs-p4nq4257o221@mnoonqbm.arg> In-Reply-To: <202210211800.29LI0mVY002625@gitrepo.freebsd.org> References: <202210211800.29LI0mVY002625@gitrepo.freebsd.org>
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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 <mckusick@FreeBSD.org> > AuthorDate: 2022-10-21 18:00:00 +0000 > Commit: Kirk McKusick <mckusick@FreeBSD.org> > 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
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