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Will mongodump leave any message in log file?

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If I use mongodump command dump data to my computer, will leave any message in log file? Or no any message be loged ?

posted Jan 5, 2017 by anonymous

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1 Answer

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mongodump has it is own logfile and logs there the progress:

2017-01-05T13:02:47.081+0100 writing test.coll3 to
2017-01-05T13:02:47.081+0100 writing mean-dev.users to
2017-01-05T13:02:47.082+0100 writing mean-dev.sessions to
2017-01-05T13:02:47.082+0100 writing test.coll to
2017-01-05T13:02:47.083+0100 done dumping mean-dev.users (1 document)
2017-01-05T13:02:47.083+0100 done dumping mean-dev.sessions (0 documents)
2017-01-05T13:02:47.115+0100 done dumping test.coll3 (6000 documents)
2017-01-05T13:02:47.133+0100 done dumping test.coll (2000 documents)

Mongodump behaves like a client, so the only thing by default you see on mongod side is the connections opening:

2017-01-05T13:02:28.738+0100 I CONTROL [initandlisten]
2017-01-05T13:02:28.743+0100 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory './db/diagnostic.data'
2017-01-05T13:02:28.743+0100 I NETWORK [HostnameCanonicalizationWorker] Starting hostname canonicalization worker
2017-01-05T13:02:28.743+0100 I NETWORK [initandlisten] waiting for connections on port 27017
2017-01-05T13:02:47.057+0100 I NETWORK [initandlisten] connection accepted from 127.0.0.1:43850 #1 (1 connection now open)
2017-01-05T13:02:47.069+0100 I NETWORK [initandlisten] connection accepted from 127.0.0.1:43852 #2 (2 connections now open)
2017-01-05T13:02:47.082+0100 I NETWORK [initandlisten] connection accepted from 127.0.0.1:43855 #3 (3 connections now open)
2017-01-05T13:02:47.082+0100 I NETWORK [initandlisten] connection accepted from 127.0.0.1:43854 #4 (4 connections now open)
2017-01-05T13:02:47.135+0100 I NETWORK [conn4] end connection 127.0.0.1:43854 (3 connections now open)
2017-01-05T13:02:47.135+0100 I NETWORK [conn1] end connection 127.0.0.1:43850 (3 connections now open)
2017-01-05T13:02:47.135+0100 I NETWORK [conn3] end connection 127.0.0.1:43855 (3 connections now open)
2017-01-05T13:02:47.135+0100 I NETWORK [conn2] end connection 127.0.0.1:43852 (3 connections now open)

Maybe with auditing you can get more details:
https://docs.mongodb.com/manual/core/auditing/

answer Jan 5, 2017 by Abhay
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