after couchbase power off, data bucket lose
I used couchbase 1.8.1 in my project. Couchbase is running on an ubuntu server. The server was powered off by some reason yestoday. But when I reboot the machine and restart the couchbase server, I lose the data bucket.
I accessed http://[ip]:8091 on browser, and got a setup page which is the same as the first time I installed couchbase. All data has lost.
Anyone could tell me why?