mongo: revert notransactions and denormalize

Author: dmitrii-ubskii

tpcc/pytpcc/drivers/mongodbdriver.py

@@ -198,8 +198,8 @@ class MongodbDriver(AbstractDriver):
     DEFAULT_CONFIG = {
         "uri":              ("The mongodb connection string or URI", "mongodb://localhost:27017"),
         "name":             ("Database name", "tpcc"),
-        "denormalize":      ("If true, data will be denormalized using MongoDB schema design best practices", False),
-        "notransactions":   ("If true, transactions will not be used (benchmarking only)", True),
+        "denormalize":      ("If true, data will be denormalized using MongoDB schema design best practices", True),
+        "notransactions":   ("If true, transactions will not be used (benchmarking only)", False),
         "findandmodify":    ("If true, all things to update will be fetched via findAndModify", True),
         "secondary_reads":  ("If true, we will allow secondary reads", True),
         "retry_writes":     ("If true, we will enable retryable writes", True),
@@ -231,7 +231,7 @@ def __init__(self, ddl, shared_event=None, worker_id=0):
         self.retry_writes = True
         self.read_concern = "majority"
         self.write_concern = pymongo.write_concern.WriteConcern(w=1)
-        self.denormalize = False
+        self.denormalize = True
         self.output = open('results.json','a')
         self.result_doc = {}
         self.warehouses = 0