More info in CompactionServiceJobInfo and CompactionJobStats (#13029)

Summary:
Add the following to the `CompactionServiceJobInfo`
- compaction_reason
- is_full_compaction
- is_manual_compaction
- bottommost_level

Added `is_remote_compaction` to the `CompactionJobStats` and set initial values to avoid UB for uninitialized values.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/13029

Test Plan:
```
./compaction_service_test --gtest_filter="*CompactionInfo*"
```

Reviewed By: anand1976

Differential Revision: D63322878

Pulled By: jaykorean

fbshipit-source-id: f02a66ca45e660b9d354a43837d8ec6beb7621fb

2 files changed, 46 insertions, 30 deletions

diff --git a/include/rocksdb/compaction_job_stats.h b/include/rocksdb/compaction_job_stats.h
index 7e8153044..8ddb6a330 100644
--- a/include/rocksdb/compaction_job_stats.h
+++ b/include/rocksdb/compaction_job_stats.h
@@ -19,80 +19,83 @@ struct CompactionJobStats {
   void Add(const CompactionJobStats& stats);
 
   // the elapsed time of this compaction in microseconds.
-  uint64_t elapsed_micros;
+  uint64_t elapsed_micros = 0;
 
   // the elapsed CPU time of this compaction in microseconds.
-  uint64_t cpu_micros;
+  uint64_t cpu_micros = 0;
 
   // Used internally indicating whether a subcompaction's
   // `num_input_records` is accurate.
-  bool has_num_input_records;
+  bool has_num_input_records = false;
   // the number of compaction input records.
-  uint64_t num_input_records;
+  uint64_t num_input_records = 0;
   // the number of blobs read from blob files
-  uint64_t num_blobs_read;
+  uint64_t num_blobs_read = 0;
   // the number of compaction input files (table files)
-  size_t num_input_files;
+  size_t num_input_files = 0;
   // the number of compaction input files at the output level (table files)
-  size_t num_input_files_at_output_level;
+  size_t num_input_files_at_output_level = 0;
 
   // the number of compaction output records.
-  uint64_t num_output_records;
+  uint64_t num_output_records = 0;
   // the number of compaction output files (table files)
-  size_t num_output_files;
+  size_t num_output_files = 0;
   // the number of compaction output files (blob files)
-  size_t num_output_files_blob;
+  size_t num_output_files_blob = 0;
 
   // true if the compaction is a full compaction (all live SST files input)
-  bool is_full_compaction;
+  bool is_full_compaction = false;
   // true if the compaction is a manual compaction
-  bool is_manual_compaction;
+  bool is_manual_compaction = false;
+  // true if the compaction ran in a remote worker
+  bool is_remote_compaction = false;
 
   // the total size of table files in the compaction input
-  uint64_t total_input_bytes;
+  uint64_t total_input_bytes = 0;
   // the total size of blobs read from blob files
-  uint64_t total_blob_bytes_read;
+  uint64_t total_blob_bytes_read = 0;
   // the total size of table files in the compaction output
-  uint64_t total_output_bytes;
+  uint64_t total_output_bytes = 0;
   // the total size of blob files in the compaction output
-  uint64_t total_output_bytes_blob;
+  uint64_t total_output_bytes_blob = 0;
+  ;
 
   // number of records being replaced by newer record associated with same key.
   // this could be a new value or a deletion entry for that key so this field
   // sums up all updated and deleted keys
-  uint64_t num_records_replaced;
+  uint64_t num_records_replaced = 0;
 
   // the sum of the uncompressed input keys in bytes.
-  uint64_t total_input_raw_key_bytes;
+  uint64_t total_input_raw_key_bytes = 0;
   // the sum of the uncompressed input values in bytes.
-  uint64_t total_input_raw_value_bytes;
+  uint64_t total_input_raw_value_bytes = 0;
 
   // the number of deletion entries before compaction. Deletion entries
   // can disappear after compaction because they expired
-  uint64_t num_input_deletion_records;
+  uint64_t num_input_deletion_records = 0;
   // number of deletion records that were found obsolete and discarded
   // because it is not possible to delete any more keys with this entry
   // (i.e. all possible deletions resulting from it have been completed)
-  uint64_t num_expired_deletion_records;
+  uint64_t num_expired_deletion_records = 0;
 
   // number of corrupt keys (ParseInternalKey returned false when applied to
   // the key) encountered and written out.
-  uint64_t num_corrupt_keys;
+  uint64_t num_corrupt_keys = 0;
 
   // Following counters are only populated if
   // options.report_bg_io_stats = true;
 
   // Time spent on file's Append() call.
-  uint64_t file_write_nanos;
+  uint64_t file_write_nanos = 0;
 
   // Time spent on sync file range.
-  uint64_t file_range_sync_nanos;
+  uint64_t file_range_sync_nanos = 0;
 
   // Time spent on file fsync.
-  uint64_t file_fsync_nanos;
+  uint64_t file_fsync_nanos = 0;
 
   // Time spent on preparing file write (fallocate, etc)
-  uint64_t file_prepare_write_nanos;
+  uint64_t file_prepare_write_nanos = 0;
 
   // 0-terminated strings storing the first 8 bytes of the smallest and
   // largest key in the output.
@@ -102,10 +105,10 @@ struct CompactionJobStats {
   std::string largest_output_key_prefix;
 
   // number of single-deletes which do not meet a put
-  uint64_t num_single_del_fallthru;
+  uint64_t num_single_del_fallthru = 0;
 
   // number of single-deletes which meet something other than a put
-  uint64_t num_single_del_mismatch;
+  uint64_t num_single_del_mismatch = 0;
 
   // TODO: Add output_to_penultimate_level output information
 };
diff --git a/include/rocksdb/options.h b/include/rocksdb/options.h
index e272e3a69..9700e25af 100644
--- a/include/rocksdb/options.h
+++ b/include/rocksdb/options.h
@@ -466,14 +466,27 @@ struct CompactionServiceJobInfo {
 
   Env::Priority priority;
 
+  // Additional Compaction Details that can be useful in the CompactionService
+  CompactionReason compaction_reason;
+  bool is_full_compaction;
+  bool is_manual_compaction;
+  bool bottommost_level;
+
   CompactionServiceJobInfo(std::string db_name_, std::string db_id_,
                            std::string db_session_id_, uint64_t job_id_,
-                           Env::Priority priority_)
+                           Env::Priority priority_,
+                           CompactionReason compaction_reason_,
+                           bool is_full_compaction_, bool is_manual_compaction_,
+                           bool bottommost_level_)
       : db_name(std::move(db_name_)),
         db_id(std::move(db_id_)),
         db_session_id(std::move(db_session_id_)),
         job_id(job_id_),
-        priority(priority_) {}
+        priority(priority_),
+        compaction_reason(compaction_reason_),
+        is_full_compaction(is_full_compaction_),
+        is_manual_compaction(is_manual_compaction_),
+        bottommost_level(bottommost_level_) {}
 };
 
 struct CompactionServiceScheduleResponse {