[db_stress] Make subcompaction random in crash_test

Summary: Make subcompaction random in crash_test

Test Plan: make crash_test and verify whether subcompaction changes randomly

Reviewers: IslamAbdelRahman, kradhakrishnan, yiwu, sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56571

tools/db_crashtest.py

@@ -45,6 +45,7 @@ default_params = {
     "verify_checksum": 1,
     "write_buffer_size": 4 * 1024 * 1024,
     "writepercent": 35,
+    "subcompactions": lambda: random.randint(1, 4),
 }
 
 
@@ -75,6 +76,7 @@ whitebox_default_params = {
     "ops_per_thread": 200000,
     "test_batches_snapshots": lambda: random.randint(0, 1),
     "write_buffer_size": 4 * 1024 * 1024,
+    "subcompactions": lambda: random.randint(1, 4),
 }
 
 simple_default_params = {
@@ -107,6 +109,7 @@ simple_default_params = {
     "verify_checksum": 1,
     "write_buffer_size": 32 * 1024 * 1024,
     "writepercent": 35,
+    "subcompactions": lambda: random.randint(1, 4),
 }
 
 blackbox_simple_default_params = {
@@ -125,6 +128,7 @@ whitebox_simple_default_params = {
     "open_files": 500000,
     "ops_per_thread": 200000,
     "write_buffer_size": 32 * 1024 * 1024,
+    "subcompactions": lambda: random.randint(1, 4),
 }
 
 
@@ -182,7 +186,8 @@ def blackbox_crash_main(args):
           + "total-duration=" + str(cmd_params['duration']) + "\n"
           + "threads=" + str(cmd_params['threads']) + "\n"
           + "ops_per_thread=" + str(cmd_params['ops_per_thread']) + "\n"
-          + "write_buffer_size=" + str(cmd_params['write_buffer_size']) + "\n")
+          + "write_buffer_size=" + str(cmd_params['write_buffer_size']) + "\n"
+          + "subcompactions=" + str(cmd_params['subcompactions']) + "\n")
 
     while time.time() < exit_time:
         run_had_errors = False
@@ -244,7 +249,8 @@ def whitebox_crash_main(args):
           + "total-duration=" + str(cmd_params['duration']) + "\n"
           + "threads=" + str(cmd_params['threads']) + "\n"
           + "ops_per_thread=" + str(cmd_params['ops_per_thread']) + "\n"
-          + "write_buffer_size=" + str(cmd_params['write_buffer_size']) + "\n")
+          + "write_buffer_size=" + str(cmd_params['write_buffer_size']) + "\n"
+          + "subcompactions=" + str(cmd_params['subcompactions']) + "\n")
 
     total_check_mode = 4
     check_mode = 0

tools/db_stress.cc

@@ -228,8 +228,8 @@ DEFINE_int64(cache_size, 2LL * KB * KB * KB,
              "Number of bytes to use as a cache of uncompressed data.");
 
 DEFINE_uint64(subcompactions, 1,
-             "Maximum number of subcompactions to divide L0-L1 compactions "
+              "Maximum number of subcompactions to divide L0-L1 compactions "
-             "into.");
+              "into.");
 
 DEFINE_bool(allow_concurrent_memtable_write, true,
             "Allow multi-writers to update mem tables in parallel.");
@@ -1929,6 +1929,8 @@ class StressTest {
             1 << FLAGS_log2_keys_per_lock);
     std::string compression = CompressionTypeToString(FLAGS_compression_type_e);
     fprintf(stdout, "Compression               : %s\n", compression.c_str());
+    fprintf(stdout, "Max subcompactions        : %" PRIu64 "\n",
+            FLAGS_subcompactions);
 
     const char* memtablerep = "";
     switch (FLAGS_rep_factory) {