On Mon, 4 Apr 2011, Chuck Swiger wrote:
On Apr 4, 2011, at 11:58 AM, Marc G. Fournier wrote:
Be careful; multiple access from different processes even on a single host can
still run into locking issues against NFS filesystems, or data corruption if
locking isn't available. You're most at risk with local delivery to an
mbox-style INBOX; delivery to maildir-style INBOX is much safer even on NFS
without locking.
In my case, I have postfix+cyrus-imapd ...
OK-- Cyrus IMAP uses a variant of maildir, so you're relatively safe
even if locking is not available.
So, just to get this clear ...
If I were to boot a diskless station using an NFS backend, then that
instance would be prone to corruption since lockd wouldn't work, even
though the only processes handling the files on that mount?
And this may be where I'm mis-understanding things:
Does rpc.lockd work at the process level or file system? For instance, in
my test case, I'm trying to operate within a jail ... does the rpc.lockd
runnig at the primary OS level handle communications between
client<->server, irrelevent of whether the process is running in a jail or
not?
----
Marc G. Fournier Hub.Org Hosting Solutions S.A.
scra...@hub.org http://www.hub.org
Yahoo:yscrappy Skype: hub.org ICQ:7615664 MSN:scra...@hub.org
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