Re: ReentrantReadWriteLock in DUH2

[Koji Sekiguchi]

> So that multiple threads can efficiently access the writer, but only 
one thread at a time does a commit.
> Adding docs with the writer is the 'read' and committing is the 
write. If I remember correctly.

You remember correctly, Mark. Because of the lock, <add/> is blocked
during <optimize/>, even if ConcurrentMergeScheduler is used, right?
I'd like to know why <add/> should be blocked during <optimize/>.
Koji