Raven.Database.DocumentDatabase.StartBackup C# (CSharp) Method

		public void StartBackup(string backupDestinationDirectory)
		{
			var document = Get(BackupStatus.RavenBackupStatusDocumentKey, null);
			if (document != null)
			{
				var backupStatus = document.DataAsJson.JsonDeserialization<BackupStatus>();
				if (backupStatus.IsRunning)
				{
					throw new InvalidOperationException("Backup is already running");
				}
			}
			Put(BackupStatus.RavenBackupStatusDocumentKey, null, RavenJObject.FromObject(new BackupStatus
			{
				Started = SystemTime.UtcNow,
				IsRunning = true,
			}), new RavenJObject(), null);
			IndexStorage.FlushMapIndexes();
			IndexStorage.FlushReduceIndexes();
			TransactionalStorage.StartBackupOperation(this, backupDestinationDirectory);
		}

		public void IncrementalBackupWithCircularLogThrows()
		{
			db.Dispose();
			db = new DocumentDatabase(new RavenConfiguration
			{
				DataDirectory = DataDir,
				RunInUnreliableYetFastModeThatIsNotSuitableForProduction = false,
			});

			db.PutIndex(new RavenDocumentsByEntityName().IndexName, new RavenDocumentsByEntityName().CreateIndexDefinition());
		
			db.Put("ayende", null, RavenJObject.Parse("{'email':'*****@*****.**'}"), new RavenJObject(), null);

			Assert.Throws<InvalidOperationException>(() => db.StartBackup(BackupDir, true, new DatabaseDocument()));
		}