{"action":"opened","issue":{"url":"https://api.github.com/repos/brianfrankcooper/YCSB/issues/400","labels_url":"https://api.github.com/repos/brianfrankcooper/YCSB/issues/400/labels{/name}","comments_url":"https://api.github.com/repos/brianfrankcooper/YCSB/issues/400/comments","events_url":"https://api.github.com/repos/brianfrankcooper/YCSB/issues/400/events","html_url":"https://github.com/brianfrankcooper/YCSB/issues/400","id":103921847,"number":400,"title":"YCSB MongoDB execute update instead of insert","user":{"login":"Spectrumleeee","id":5819082,"avatar_url":"https://avatars.githubusercontent.com/u/5819082?v=3","gravatar_id":"","url":"https://api.github.com/users/Spectrumleeee","html_url":"https://github.com/Spectrumleeee","followers_url":"https://api.github.com/users/Spectrumleeee/followers","following_url":"https://api.github.com/users/Spectrumleeee/following{/other_user}","gists_url":"https://api.github.com/users/Spectrumleeee/gists{/gist_id}","starred_url":"https://api.github.com/users/Spectrumleeee/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Spectrumleeee/subscriptions","organizations_url":"https://api.github.com/users/Spectrumleeee/orgs","repos_url":"https://api.github.com/users/Spectrumleeee/repos","events_url":"https://api.github.com/users/Spectrumleeee/events{/privacy}","received_events_url":"https://api.github.com/users/Spectrumleeee/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-30T13:00:34Z","updated_at":"2015-08-30T13:00:34Z","closed_at":null,"body":"i tried to use YCSB-0.3.0 to test the write ops of mongodb, and i used mongostat to show the status of mongodb, i can't find the insert operation not matter during load phase or run phase with insert operations, it turns out YCSB use update operation to insert all the records. So, how can i use YCSB to test insert ops of mongodb?"}}