Change read preference #113
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In the current
rundb.pythe read preference for the MongoDB client is set to beSecondaryPreffered. But it doesn't stop the client from reading from the primary when the secondaries are not available. As the network bandwidth of the primary one is not satisfactory, we should avoid reading from the primary and just read from the secondaries.Reference: the documentation of
pymongoabout the read preference:https://pymongo.readthedocs.io/en/stable/api/pymongo/read_preferences.html