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[06:55:02] <erhandsome> hi, is it safe to mongodump wiredtiger engine database and mongorestore it to mmapv1 engine database?

[08:38:43] <prabampm> i have a 3 node mongo cluster and both secondaries are going to recovery mode when we do a restart of the mongo services. http://dpaste.com/32MS6H9 . we use mmap engine: version 3.6.9

[08:38:49] <prabampm> any thoughts ?

[12:13:07] <GothAlice> erhandsome: How would that make any sense whatsoever?

[12:14:10] <GothAlice> Notably, yes, you can dump a DB containing collections stored using any collection, and restore it to a DB stored using a different engine, that should be no problem. My confusion was in my thinking you thought one or the other was related to the storage engine; they aren't at all.

[12:14:22] <GothAlice> s/any collection/any engine/

[13:18:44] <erhandsome> GothAlice: well... was running mongodb 3.2.9, and it's started by mmapv1 engine, then someone restarted it but the dbpath is wrong, so it's running in wiredtiger engine with new data, the old data couldn't found... finally i figured it out,so i need to get old data back...

[13:20:52] <erhandsome> GothAlice: i did some test and it works, but i am afraid if there gonna be really ok with the project,so i came here... thanks for your reply