SERVER-59833 Expand WT config fuzzing in mongod for collections and indexes

2 files changed, 35 insertions, 7 deletions

diff --git a/buildscripts/resmokelib/configure_resmoke.py b/buildscripts/resmokelib/configure_resmoke.py
index 06fe4b479d3..34eb2295b2e 100644
--- a/buildscripts/resmokelib/configure_resmoke.py
+++ b/buildscripts/resmokelib/configure_resmoke.py
@@ -250,8 +250,9 @@ def _update_config_vars(values):  # pylint: disable=too-many-statements,too-many
             _config.CONFIG_FUZZ_SEED = random.randrange(sys.maxsize)
         else:
             _config.CONFIG_FUZZ_SEED = int(_config.CONFIG_FUZZ_SEED)
-        _config.MONGOD_SET_PARAMETERS, _config.WT_ENGINE_CONFIG = mongod_fuzzer_configs \
-            .fuzz_set_parameters(_config.CONFIG_FUZZ_SEED, _config.MONGOD_SET_PARAMETERS)
+        _config.MONGOD_SET_PARAMETERS, _config.WT_ENGINE_CONFIG, _config.WT_COLL_CONFIG, \
+        _config.WT_INDEX_CONFIG = mongod_fuzzer_configs.fuzz_set_parameters(
+            _config.CONFIG_FUZZ_SEED, _config.MONGOD_SET_PARAMETERS)
 
     _config.MONGOS_EXECUTABLE = _expand_user(config.pop("mongos_executable"))
 
@@ -324,12 +325,16 @@ def _update_config_vars(values):  # pylint: disable=too-many-statements,too-many
     _config.ARCHIVE_LIMIT_MB = config.pop("archive_limit_mb")
     _config.ARCHIVE_LIMIT_TESTS = config.pop("archive_limit_tests")
 
-    # Wiredtiger options.
-    _config.WT_COLL_CONFIG = config.pop("wt_coll_config")
+    # Wiredtiger options. Prevent fuzzed wt configs from being overwritten unless user specifies it.
     wt_engine_config = config.pop("wt_engine_config")
-    if wt_engine_config:  # prevents fuzzed wt_engine_config from being overwritten unless user specifies it
+    if wt_engine_config:
         _config.WT_ENGINE_CONFIG = config.pop("wt_engine_config")
-    _config.WT_INDEX_CONFIG = config.pop("wt_index_config")
+    wt_coll_config = config.pop("wt_coll_config")
+    if wt_coll_config:
+        _config.WT_COLL_CONFIG = config.pop("wt_coll_config")
+    wt_index_config = config.pop("wt_index_config")
+    if wt_index_config:
+        _config.WT_INDEX_CONFIG = config.pop("wt_index_config")
 
     # Benchmark/Benchrun options.
     _config.BENCHMARK_FILTER = config.pop("benchmark_filter")
diff --git a/buildscripts/resmokelib/mongod_fuzzer_configs.py b/buildscripts/resmokelib/mongod_fuzzer_configs.py
index e0a3beff643..1772633d900 100644
--- a/buildscripts/resmokelib/mongod_fuzzer_configs.py
+++ b/buildscripts/resmokelib/mongod_fuzzer_configs.py
@@ -34,6 +34,28 @@ def generate_eviction_configs(rng):
                                                                  close_scan_interval)
 
 
+def generate_table_configs(rng):
+    """Generate random configurations for wiredTigerCollectionConfigString parameter."""
+
+    # TODO(SERVER-60747): Add fuzzing for leaf_page_max
+
+    internal_page_max = rng.choice([4, 8, 12, 1024, 10 * 1024]) * 1024
+    leaf_value_max = rng.choice([1, 32, 128, 256]) * 1024 * 1024
+
+    memory_page_max_lower_bound = 16 * 1024  # leaf_page_max
+    # Assume WT cache size of 1GB as most MDB tests specify this as the cache size
+    memory_page_max_upper_bound = (rng.randint(256, 1024) * 1024 * 1024) / 10  # cache_size / 10
+    memory_page_max = rng.randint(memory_page_max_lower_bound, memory_page_max_upper_bound)
+
+    split_pct = rng.choice([50, 60, 75, 100])
+    prefix_compression = rng.choice(["true", "false"])
+    block_compressor = rng.choice(["none", "snappy", "zlib", "zstd"])
+
+    return "block_compressor={0},internal_page_max={1},leaf_value_max={2},memory_page_max={3},"\
+        "prefix_compression={4},split_pct={5}".format(block_compressor, internal_page_max, leaf_value_max,
+                                                      memory_page_max, prefix_compression, split_pct)
+
+
 def generate_flow_control_parameters(rng):
     """Generate parameters related to flow control and returns a dictionary."""
     configs = {}
@@ -78,4 +100,5 @@ def fuzz_set_parameters(seed, user_provided_params):
     for key, value in utils.load_yaml(user_provided_params).items():
         ret[key] = value
 
-    return utils.dump_yaml(ret), generate_eviction_configs(rng)
+    return utils.dump_yaml(ret), generate_eviction_configs(rng), generate_table_configs(rng), \
+        generate_table_configs(rng)