unionfs on CURRENT for read only OK?

[Daniel Eriksson]

Chad Leigh wrote:

> The man pages for unionfs basically say to avoid it as it has 
> problems. 
>    However, I was wondering about people's experience with it 
> for read 
> only mounts.

The nullfs man page says mostly the same thing, and I'm using it extensively
on one of my servers (200+ rw mounts) without any problems (yet). I've been
running like this for 10 days now using an up-to-date 5-CURRENT. Writes are
done both to the underlying filesystem and through the nullfs mount, but
most of the access is read (10-to-1 ratio for read-vs-write probably).

And to make it even more interesting the underlying filesystems reside on a
mixture of "old" vinum arrays, ataraid arrays and single discs.

I do have some problems, but I had them even before I started using
mount_nullfs so they should not be related.

/Daniel Eriksson