Subject: Re: union mounts and NFS
To: None <current-users@NetBSD.ORG>
From: der Mouse <mouse@Rodents.Montreal.QC.CA>
List: current-users
Date: 02/03/1997 14:19:37
> I wanted to create a "private /sys" directory with union mounts. I
> get "union: Operation not supported"

> The location of the "upper" file system (the mount point with -b) is
> on an NFS mount, specifically, an AMD managed mount.  Is this a
> problem?

Yes.  In the current implementation, unionfs demands that the upper
layer support whiteouts, or else that the mount be read-only.

IMO this is a problem with it, but as they say, "put up or shut up",
and I haven't yet found the time to redo unionfs so it keeps metadata
in files, a la Sun's tfs.  I did a user-land version of it, but ran
into the locking problems NFS had at the time....

					der Mouse

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