WIP: [DocDB] Add additional logging about SST files

src/yb/rocksdb/db/compaction_picker.cc

@@ -1363,9 +1363,9 @@ void UniversalCompactionPicker::SortedRun::DumpSizeInfo(
     snprintf(out_buf, out_buf_size,
              "file %" PRIu64 "[%" ROCKSDB_PRIszt
              "] "
-             "with size %" PRIu64 " (compensated size %" PRIu64 ")",
+             "with size %" PRIu64 " (compensated size %" PRIu64 "), metadata size %" PRIu64,
              file->fd.GetNumber(), sorted_run_count, file->fd.GetTotalFileSize(),
-             file->compensated_file_size);
+             file->compensated_file_size, file->fd.GetBaseFileSize());
   } else {
     snprintf(out_buf, out_buf_size,
              "level %d[%" ROCKSDB_PRIszt

src/yb/rocksdb/db/event_helpers.cc

@@ -46,7 +46,9 @@ void EventHelpers::LogAndNotifyTableFileCreation(
           << "job" << info.job_id
           << "event" << "table_file_creation"
           << "file_number" << fd.GetNumber()
-          << "file_size" << fd.GetTotalFileSize();
+          << "file_size" << fd.GetTotalFileSize()
+          << "metadata_size" << fd.GetBaseFileSize()
+          << "cache_key_prefix" << info.table_properties.cache_key_prefix;
 
   // table_properties
   {

src/yb/rocksdb/table/block_based_table_builder.cc

@@ -27,8 +27,10 @@
 #include <inttypes.h>
 #include <stdio.h>
 
+#include <iomanip>
 #include <map>
 #include <memory>
+#include <sstream>
 #include <string>
 #include <unordered_map>
 #include <utility>
@@ -457,6 +459,15 @@ BlockBasedTableBuilder::BlockBasedTableBuilder(
           /* meta_block_checksum = */ 0,
           &rep_->metadata_writer->compressed_cache_key_prefix);
     }
+
+    // Convert the binary data in the prefix buffer to a single hex-formatted string for logging.
+    std::ostringstream hex_stream;
+    hex_stream << std::hex << std::setw(2) << std::setfill('0');
+    for (size_t i = 0; i < rep_->metadata_writer->compressed_cache_key_prefix.size; ++i) {
+        hex_stream << static_cast<unsigned int>(
+          static_cast<unsigned char>(rep_->metadata_writer->compressed_cache_key_prefix.data[i]));
+    }
+    rep_->props.cache_key_prefix = hex_stream.str();
   }
 }
 

src/yb/rocksdb/table_properties.h

@@ -76,6 +76,8 @@ struct TableProperties {
   // The name of the filter policy used in this table.
   // If no filter policy is used, `filter_policy_name` will be an empty string.
   std::string filter_policy_name;
+  // Cache key prefix used for detecting collision of SST table.
+  std::string cache_key_prefix = "";
 
   // user collected properties
   UserCollectedProperties user_collected_properties;