[horde] VFS inoperable when changing from SQL to NoSQL driver

[Arjen de Korte]

I tried switching from SQL to NoSQL for the Virtual File Storage. In  
the Virtual File Storage Settings I changed the $conf[vfs][type] from  
'SQL database' to 'NoSQL database' (which propagated to  
config/conf.php, where the value changed from 'Sql' to 'Nosql'). But  
whatever I try, I can't seem to get this to work. When attempting to  
upload a 1 MB attachment in a new message (which takes about 10  
seconds with the SQL backend), even after waiting several minutes,  
uploading is not finished. Switching back to SQL database again and it  
works again.

NoSQL seems to be working for IMP though, since when I look in the  
phpMoAdmin what is happening, I can see that  
horde_imap_client_cache_{data,mesagge,metadata} exist (and are  
growing). But I would expect something like a horde_vfs_{something}  
too, but there isn't. Did I miss a step when changing from SQL to  
NoSQL? This is with the latest packages from PEAR.