Try to recreate gc reserve after successful garbage collect if it is not present

1 files changed, 34 insertions, 0 deletions

diff --git a/zenstore/compactcas.cpp b/zenstore/compactcas.cpp
index 00149593b..4e379194a 100644
--- a/zenstore/compactcas.cpp
+++ b/zenstore/compactcas.cpp
@@ -820,6 +820,35 @@ CasContainerStrategy::CollectGarbage(GcContext& GcCtx)
 			 DeletedChunks.size(),
 			 MovedChunks.size(),
 			 TotalChunkCount);
+
+	std::filesystem::path GCReservePath = m_Config.RootDirectory / (m_ContainerBaseName + ".gc.reserve.ucas");
+	if (std::filesystem::is_regular_file(GCReservePath))
+	{
+		return;
+	}
+
+	std::error_code Error;
+	DiskSpace		Space = DiskSpaceInfo(m_Config.RootDirectory, Error);
+	if (Error)
+	{
+		ZEN_ERROR("get disk space in {} FAILED, reason '{}'", m_ContainerBaseName, Error.message());
+		return;
+	}
+	if (Space.Free < m_MaxBlockSize)
+	{
+		ZEN_INFO("not enough space for garbage collect reserve '{}' FAILED, required disk space {}, free {}",
+				 m_Config.RootDirectory / m_ContainerBaseName,
+				 m_MaxBlockSize,
+				 NiceBytes(Space.Free));
+		return;
+	}
+	BasicFile GCReserveFile;
+	GCReserveFile.Open(GCReservePath, true);
+	GCReserveFile.SetFileSize(m_MaxBlockSize);
+
+	ZEN_DEBUG("recreated garbage collect reserve '{}' FAILED, {} bytes",
+		m_Config.RootDirectory / m_ContainerBaseName,
+		NiceBytes(Space.Free));
 }
 
 void
@@ -1260,6 +1289,11 @@ CasContainerStrategy::OpenContainer(bool IsNewStore)
 				{
 					GCReserveFile.SetFileSize(m_MaxBlockSize);
 				}
+				else
+				{
+					// We need it to be the proper size if we are to use it
+					std::filesystem::remove(GCReservePath);
+				}
 			}
 		}
 	}