SVN - Different client version on the same repository -

i created repository subversion client in version 1.6. checked out project other client - version 1.8.

now when want commit changes - 1.8 client ask me "svn upgrade".

if "svn upgrade" working copy, , commit changes. can still use repository clients of version 1.6?

1. u wanna read @ least abc of svn - svn book in order split relevant , irrelevant data
2. u wanna improve memory - got wc with 1.6 client , access later (still wc in 1.6 format) 1.8 client (only such way can see "please svn upgrade")
3. version of wc doesn't affect in way format of repository , accessibility of repository client (while you'll use network-layer access, not file-type): can have in different locations different versions of wc different version of client-side svn single format of repository