[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: fsync_range and O_RDONLY
On Wed, Feb 17, 2021 at 01:17:14PM -0500, Greg Troxel wrote:
> > Last year, fdatasync() was changed to allow syncing files opened
> > read-only, because that ceased to be prohibited by POSIX and something
> > apparently depended on it.
> I have a dim memory of this and mongodb.
> > However, fsync_range() was not also so changed. Should it have been?
> > It's now inconsistent with fsync and fdatasync and it seems like it's
> > meant to be a strict superset of them.
> It seems like it might as well be. I would expect this to only really
> sync the file's metadata, same as the others, but I do not feel like I
> really understand this.
Well, if you have it open for write and I have it open for read, and I
fsync it, it'll sync your changes.
And report any errors to me, so if you're a database and I'm feeling
nasty I can maybe mess with you that way. So I'm not sure it's a great
Right now fsync error reporting is a trainwreck though.
David A. Holland
Main Index |
Thread Index |