Allow db_stress to use a secondary cache (#8455)

Summary:
Add a ```-secondary_cache_uri``` to db_stress to allow the user to specify a custom ```SecondaryCache``` object from the object registry. Also allow db_crashtest.py to be run with an alternate db_stress location. Together, these changes will allow us to run db_stress using FB internal components.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8455

Reviewed By: zhichao-cao

Differential Revision: D29371972

Pulled By: anand1976

fbshipit-source-id: dd1b1fd80ebbedc11aa63d9246ea6ae49edb77c4

db_stress_tool/db_stress_common.h

@@ -131,6 +131,7 @@ DECLARE_int32(get_current_wal_file_one_in);
 DECLARE_int32(set_options_one_in);
 DECLARE_int32(set_in_place_one_in);
 DECLARE_int64(cache_size);
+DECLARE_int32(cache_numshardbits);
 DECLARE_bool(cache_index_and_filter_blocks);
 DECLARE_int32(top_level_index_pinning);
 DECLARE_int32(partition_pinning);
@@ -262,6 +263,7 @@ DECLARE_bool(fail_if_options_file_error);
 DECLARE_uint64(batch_protection_bytes_per_key);
 
 DECLARE_uint64(user_timestamp_size);
+DECLARE_string(secondary_cache_uri);
 
 constexpr long KB = 1024;
 constexpr int kRandomValueMaxFactor = 3;

db_stress_tool/db_stress_gflags.cc

@@ -284,6 +284,11 @@ DEFINE_int32(set_in_place_one_in, 0,
 DEFINE_int64(cache_size, 2LL * KB * KB * KB,
              "Number of bytes to use as a cache of uncompressed data.");
 
+DEFINE_int32(cache_numshardbits, 6,
+             "Number of shards for the block cache"
+             " is 2 ** cache_numshardbits. Negative means use default settings."
+             " This is applied only if FLAGS_cache_size is non-negative.");
+
 DEFINE_bool(cache_index_and_filter_blocks, false,
             "True if indexes/filters should be cached in block cache.");
 
@@ -815,4 +820,9 @@ DEFINE_int32(open_metadata_write_fault_one_in, 0,
              "On non-zero, enables fault injection on file metadata write "
              "during DB reopen.");
 
+#ifndef ROCKSDB_LITE
+DEFINE_string(secondary_cache_uri, "",
+              "Full URI for creating a customized secondary cache object");
+#endif  // ROCKSDB_LITE
+
 #endif  // GFLAGS

db_stress_tool/db_stress_test_base.cc

@@ -14,8 +14,10 @@
 #include "db_stress_tool/db_stress_driver.h"
 #include "db_stress_tool/db_stress_table_properties_collector.h"
 #include "rocksdb/convenience.h"
+#include "rocksdb/secondary_cache.h"
 #include "rocksdb/sst_file_manager.h"
 #include "rocksdb/types.h"
+#include "rocksdb/utilities/object_registry.h"
 #include "util/cast_util.h"
 #include "utilities/backupable/backupable_db_impl.h"
 #include "utilities/fault_injection_fs.h"
@@ -49,7 +51,7 @@ std::shared_ptr<const FilterPolicy> CreateFilterPolicy() {
 }  // namespace
 
 StressTest::StressTest()
-    : cache_(NewCache(FLAGS_cache_size)),
+    : cache_(NewCache(FLAGS_cache_size, FLAGS_cache_numshardbits)),
       compressed_cache_(NewLRUCache(FLAGS_compressed_cache_size)),
       filter_policy_(CreateFilterPolicy()),
       db_(nullptr),
@@ -114,7 +116,8 @@ StressTest::~StressTest() {
   delete cmp_db_;
 }
 
-std::shared_ptr<Cache> StressTest::NewCache(size_t capacity) {
+std::shared_ptr<Cache> StressTest::NewCache(size_t capacity,
+                                            int32_t num_shard_bits) {
   if (capacity <= 0) {
     return nullptr;
   }
@@ -126,7 +129,24 @@ std::shared_ptr<Cache> StressTest::NewCache(size_t capacity) {
     }
     return cache;
   } else {
-    return NewLRUCache((size_t)capacity);
+    LRUCacheOptions opts;
+    opts.capacity = capacity;
+    opts.num_shard_bits = num_shard_bits;
+#ifndef ROCKSDB_LITE
+    std::shared_ptr<SecondaryCache> secondary_cache;
+    if (!FLAGS_secondary_cache_uri.empty()) {
+      Status s = ObjectRegistry::NewInstance()->NewSharedObject<SecondaryCache>(
+          FLAGS_secondary_cache_uri, &secondary_cache);
+      if (secondary_cache == nullptr) {
+        fprintf(stderr,
+                "No secondary cache registered matching string: %s status=%s\n",
+                FLAGS_secondary_cache_uri.c_str(), s.ToString().c_str());
+        exit(1);
+      }
+      opts.secondary_cache = secondary_cache;
+    }
+#endif
+    return NewLRUCache(opts);
   }
 }
 

db_stress_tool/db_stress_test_base.h

@@ -23,7 +23,7 @@ class StressTest {
 
   virtual ~StressTest();
 
-  std::shared_ptr<Cache> NewCache(size_t capacity);
+  std::shared_ptr<Cache> NewCache(size_t capacity, int32_t num_shard_bits);
 
   static std::vector<std::string> GetBlobCompressionTags();
 

tools/db_crashtest.py

@@ -151,6 +151,7 @@ default_params = {
 _TEST_DIR_ENV_VAR = 'TEST_TMPDIR'
 _DEBUG_LEVEL_ENV_VAR = 'DEBUG_LEVEL'
 
+stress_cmd = "./db_stress"
 
 def is_release_mode():
     return os.environ.get(_DEBUG_LEVEL_ENV_VAR) == "0"
@@ -413,12 +414,12 @@ def gen_cmd_params(args):
 
 def gen_cmd(params, unknown_params):
     finalzied_params = finalize_and_sanitize(params)
-    cmd = ['./db_stress'] + [
+    cmd = [stress_cmd] + [
         '--{0}={1}'.format(k, v)
         for k, v in [(k, finalzied_params[k]) for k in sorted(finalzied_params)]
         if k not in set(['test_type', 'simple', 'duration', 'interval',
                          'random_kill_odd', 'cf_consistency', 'txn',
-                         'test_best_efforts_recovery', 'enable_ts'])
+                         'test_best_efforts_recovery', 'enable_ts', 'stress_cmd'])
         and v is not None] + unknown_params
     return cmd
 
@@ -669,6 +670,8 @@ def whitebox_crash_main(args, unknown_args):
 
 
 def main():
+    global stress_cmd
+
     parser = argparse.ArgumentParser(description="This script runs and kills \
         db_stress multiple times")
     parser.add_argument("test_type", choices=["blackbox", "whitebox"])
@@ -677,6 +680,7 @@ def main():
     parser.add_argument("--txn", action='store_true')
     parser.add_argument("--test_best_efforts_recovery", action='store_true')
     parser.add_argument("--enable_ts", action='store_true')
+    parser.add_argument("--stress_cmd")
 
     all_params = dict(list(default_params.items())
                       + list(blackbox_default_params.items())
@@ -698,6 +702,8 @@ def main():
                 (_TEST_DIR_ENV_VAR, test_tmpdir))
         sys.exit(1)
 
+    if args.stress_cmd:
+        stress_cmd = args.stress_cmd
     if args.test_type == 'blackbox':
         blackbox_crash_main(args, unknown_args)
     if args.test_type == 'whitebox':