WiredTiger dudes are tight with Cloudera's Mike Olson
As noted, the leaders from WiredTiger were also leaders at Sleepycat, where Clodera's chief strategy officer, Mike Olson, was CEO. Sleepycat sold to Oracle in 2006. According to Curt Monash, the database guru's database guru, Olson recently had nothing but good things to say about his former collegues now with WiredTiger. I should note that Cloudera and MongoDB have an alliance of sorts -- basically they've agreed to be mutually supportive, to avoid trompling on each other's turf, and to be consistent in educating customers on the respective benefits and use cases for Hadoop and NoSQL databases.