Quisce couchbase database

Is there way to quisce database ? We want to take filesystem snapshot to backup database and want to ensure its is in consistent state when we restore filesystem.
for e.g. in mongodb we quisce database by db.fsyncLock(), oracle - we quisce by “alter system quiesce restricted;”. How can we achieve similar functionality in couchbase.
Goal is to take consistent snapshot of filesystem as backup.
Please advice.