Suggestion to have multiple sites share a common shared directory

[gilbert]

Hi,

I have a client that would like to have several sites share a common set of files such as images.

What permissions would you recommend I use to set a directory to have so it could be accessible by multiple ispcp users.

Also would you suggest we use a link or do we need to copy the files to each of the sites directory structure?

Please suggest pros and cons of using links versus copying files.
Obviously copying would duplicate files and waste storage.

If I created a folder such as /var/www/virtual/site1.com/htdoc/sharedfolder.
Where would we actually put the sharefolder.
I assume that the group would be www-data
who would be the owner
I guess if the permissions were rw-rw-r-- it would be ok?

Thanks,

Gilbert.