solr-cloud problem about user-specified tags

[qibaoyuan]

I have plenty of docs and each docs maybe connected to many user-defined tags.I 
have used sold-cloud, and use join to do this kind of job,and recently i know 
sole-cloud does not support distributed search.AND so this is a big problem so 
far.AND the decomposition is quite impossible,because docs and user-defined 
docs are so huge,and many search is always searched on these two fields.ANY 
good idea to deal with this problem??