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Re:Things I wish I knew about MongoDB a year ago by elchief on Wednesday October 17, 2012 @08:02PM (#4666961)
no longer (but only a few months)
Re:Things I wish I knew about MongoDB a year ago by mgummelt on Wednesday October 17, 2012 @09:14PM (#4667089)
Though I believe it still has a per-collection lock.
Re:Things I wish I knew about MongoDB a year ago by Jare on Wednesday October 17, 2012 @09:49PM (#4667146)
It has per-database locking. Per-collection is being worked on but no planned date yet. [1]

[1] http://www.mongodb.org/display/DOCS/How+does+concurrency+wor...