From: Charles Duffy <charles@dyfis.net>
To: linux-nfs@vger.kernel.org
Subject: Apparent race condition w/ NFSv3 mktemp+write+rename
Date: Tue, 24 Nov 2009 13:26:44 -0600 [thread overview]
Message-ID: <hehc8g$k8f$1@ger.gmane.org> (raw)
Howdy. With a very heavily loaded (CentOS 5 - Linux 2.6.18-128.el5)
NFSv3 client and server, I've experienced the following sporadic issue:
function atomic_write() {
local filename="$1"
local tempfile
tempfile="$(mktemp "${filename}.XXXXXX")"
cat >"${tempfile}" && mv "${tempfile}" "${filename}"
}
$ atomic_write /mnt/foobar <<<"baz"
mv: cannot move `/mnt/foobar.gO1881' to `/mnt/foobar': No such file or
directory
Are my assumptions regarding available semantics fair and reasonable?
next reply other threads:[~2009-11-24 19:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 19:26 Charles Duffy [this message]
2009-11-24 20:03 ` Apparent race condition w/ NFSv3 mktemp+write+rename Jeff Layton
2009-11-24 20:04 ` Jeff Layton
2009-11-24 20:03 ` Peter Staubach
2009-11-24 20:24 ` Charles Duffy
[not found] ` <4B0C4116.10903-7s4ginpmXnFeoWH0uzbU5w@public.gmane.org>
2009-11-24 20:30 ` Peter Staubach
2009-11-24 20:36 ` Charles Duffy
[not found] ` <4B0C43D5.7000103-7s4ginpmXnFeoWH0uzbU5w@public.gmane.org>
2009-11-24 20:44 ` Peter Staubach
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