On 12/27/19 9:06 AM, Ken Moffat via blfs-support wrote:
On Fri, Dec 27, 2019 at 02:55:40PM +0000, Ken Moffat wrote:
I can see similar slowness when I try to untar in my nfs export, but
for the first stage of my backups I use rsync to an nfs mount -
obviously the first _system_ backup is slow, but general updates
after that (only changed/added files are not too bad. And writes to
my notes (and downloading tarballs to my sources) are all over nfs
and seem fine.
But for this specific slowness, please see
https://bugzilla.redhat.com/show_bug.cgi?id=790232
specifically the first part of comment 2 - the sync to disk for each
created file is presumably the reason for the slowness.
So, don't build big source packages in an nfs mount (similar
slowness will presumably happen on each created file during a
compile).
As an alternative, use async in the nfs options (man exports), both
for the export and for the mount. But expect damage if you ever get
an unclean shutdown.
Thanks for the link. It confirms what I thought, but with more detail.
Simple copies of a single file like a wget or log outputs are no issue
and the tar issue is fairly easy to work around.
-- Bruce
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