Hi, concurrent load will not cause the problem and I've tried that months ago.
Seen from the log, it seems that the problem lies in Compation that automatically triggered after loading. To solve the problem, I think you can： 1. firstly turn off auto-compaction to increase loading performance, and you can fire concurrent loading here. 2. trigger compaction at some period for the performance of future query. Be sure not to fire multiple compaction concurrently which I'm not sure whether it has problems or not. But I think you can fire compaction along with the loading （which is not tested by me yet.） -- Sent from: http://apache-carbondata-dev-mailing-list-archive.1130556.n5.nabble.com/
