add command line options for compact block threshold and gc verbose (#557)

- Feature: Added new options to zenserver for GC V2
  - `--gc-compactblock-threshold` GCV2 - how much of a compact block should be used to skip compacting the block, default is 90%
  - `--gc-verbose` GCV2 - enable more verbose output when running a GC pass
- Feature: Added new options to `zen gc` command for GC V2
  - `--compactblockthreshold` GCV2 - how much of a compact block should be used to skip compacting the block, default is 90%
  - `--verbose` GCV2 - enable more verbose output when running a GC pass
- Feature: Added new parameters for endpoint `admin/gc` (PUT)
  - `compactblockthreshold` GCV2 - how much of a compact block should be used to skip compacting the block, default is 90%
  - `verbose` GCV2 - enable more verbose output when running a GC pass

1 files changed, 8 insertions, 2 deletions

diff --git a/src/zenstore/include/zenstore/gc.h b/src/zenstore/include/zenstore/gc.h
index 4cd01bc2c..f50af8006 100644
--- a/src/zenstore/include/zenstore/gc.h
+++ b/src/zenstore/include/zenstore/gc.h
@@ -397,7 +397,9 @@ struct GcSchedulerConfig
 	uint64_t			  DiskSizeSoftLimit					= 0;
 	uint64_t			  MinimumFreeDiskSpaceToAllowWrites = 1ul << 28;
 	std::chrono::seconds  LightweightInterval{};
-	GcVersion			  UseGCVersion = GcVersion::kV1;
+	GcVersion			  UseGCVersion						= GcVersion::kV1;
+	uint32_t			  CompactBlockUsageThresholdPercent = 90;
+	bool				  Verbose							= false;
 };
 
 struct GcSchedulerState
@@ -469,6 +471,8 @@ public:
 		bool					 SkipCid				 = false;
 		bool					 SkipDelete				 = false;
 		std::optional<GcVersion> ForceGCVersion;
+		std::optional<uint32_t>	 CompactBlockUsageThresholdPercent;
+		std::optional<bool>		 Verbose;
 	};
 
 	bool TriggerGc(const TriggerGcParams& Params);
@@ -488,7 +492,9 @@ private:
 								bool					  Delete,
 								bool					  CollectSmallObjects,
 								bool					  SkipCid,
-								GcVersion				  UseGCVersion);
+								GcVersion				  UseGCVersion,
+								uint32_t				  CompactBlockUsageThresholdPercent,
+								bool					  Verbose);
 	void		 ScrubStorage(bool DoDelete, std::chrono::seconds TimeSlice);
 	LoggerRef	 Log() { return m_Log; }
 	virtual bool AreDiskWritesAllowed() const override { return !m_AreDiskWritesBlocked.load(); }