[CentOS] "Overlay" Filesystem Mounts?

On Tue, 15 Nov 2011, Tim Nelson wrote:

> ----- Original Message -----
>> On Tue, 15 Nov 2011, Tim Nelson wrote:
>>
>>> I'm already doing this. It "works", but is quite messy. I had hoped
>>> there
>>> would be an actual filesystem merging function that would do this
>>> automagically.
>>
>> Presumably it's be easy enough to knock up with fuse, but there'd be a
>> small
>> performance hit compared to the symlink approach.
>
> A small loss of performance would be acceptable.
>
>> Why are you wanting to do this out of interest? Are you merging
>> filesystems
>> from multiple servers?
>
> Yes, multiple exports on multiple servers. The data is read by a legacy
> application that does not have a concept of 'multiple data locations' in
> which to read data from. :-/

Anything of interest here?

http://en.wikipedia.org/wiki/UnionFS

jh