After an unexpected crash, I can't restart ... the mongodb database
Time to exercise your Recovery Strategy, put your Recovery Plan into operation and get your database back from the Backups you've taken of it.
Your database is actually remarkably resilient.
Left to its own devices (and all other things being equal) it will recover from a server crash all ...
MongoDB doesn't have Data Definition Language. In place of "rows" and "columns" it has "objects" and "attributes". An object is typically not defined or constrained by the storage engine as it would be in a relational database.
The data is not defined by the thing that keeps it but rather by the thing that reads and ...
For a secondary read preference, the server selection algorithm determines which node has the lowest round trip time, and randomly selects one of the nodes that is within 15 milliseconds of that latency.
If the RNG is good, and the sample size large enough, that will usually balance, but not always.
If you need to ensure strict balancing between the ...
Problem is in metadata.json files. You need to remove 'options' and it will work just fine. I even created small python tool to do this:
from glob import glob
for filename in sorted(glob('dump/*/*.metadata.json')):
with open(filename, 'r') as f:
data = json.loads(f.read())
if 'options' in data: