In some of the recent Membase meetups, the topic of what moxi does for clients has been discussed a bit. The bit of background many folks didn't initially have is that moxi began life as being a way to bring some "smarter" capabilities to some memcached clients, using many of the same techniques Dustin had written into spymemcached.
Mainly this was for PHP and Ruby clients, which typically run with many processes that either don't share resources at all or use apartment multithreading under Apache 2.
But, it wasn't yet ready for Membase and vBuckets...
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