diff --git a/cache/pangu_tango_cache.a b/cache/pangu_tango_cache.a
index 20e2fea..b39903e 100644
Binary files a/cache/pangu_tango_cache.a and b/cache/pangu_tango_cache.a differ
diff --git a/cache/tango_cache_client.cpp b/cache/tango_cache_client.cpp
index 2938552..7e24969 100644
--- a/cache/tango_cache_client.cpp
+++ b/cache/tango_cache_client.cpp
@@ -9,16 +9,34 @@
 #include <time.h>
 #include <string.h>
 #include <openssl/sha.h>
+#include <openssl/md5.h>
 
 #include <MESA/MESA_prof_load.h>
 
 #include "tango_cache_client_in.h"
 #include "tango_cache_transfer.h"
 #include "tango_cache_tools.h"
+#include "tango_cache_xml.h"
 
-int TANGO_CACHE_VERSION_20180925=0;
+int TANGO_CACHE_VERSION_20181009=0;
 
-static void caculate_sha256(const char *data, unsigned long len, char *result, u_int32_t size)
+static int caculate_base64_md5(const char *data, unsigned long len, unsigned char *result, unsigned int size)
+{
+	MD5_CTX c;
+	unsigned char md5[17]={0};
+
+	if(size < 33)
+		return -1;
+
+	MD5_Init(&c);
+	MD5_Update(&c, data, len);
+	MD5_Final(md5, &c);
+	
+	Base64_EncodeBlock(md5, 16, result);
+	return 0;
+}
+
+void caculate_sha256(const char *data, unsigned long len, char *result, u_int32_t size)
 {
 	SHA256_CTX c;
 	unsigned char sha256[128];
@@ -101,12 +119,12 @@ void tango_cache_get_object_path(const struct tango_cache_ctx *ctx, char *path,
 	snprintf(path, pathsize, "http://%s/%s/%s", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key);
 }
 
-static void update_statistics(enum CACHE_REQUEST_METHOD method, bool fail_state, enum CACHE_ERR_CODE error_code, struct cache_statistics *statistic)
+static void update_statistics(struct tango_cache_ctx *ctx, struct cache_statistics *statistic)
 {
-	switch(method)
+	switch(ctx->method)
 	{
 		case CACHE_REQUEST_PUT:
-			if(fail_state)
+			if(ctx->fail_state)
 			{
 				statistic->put_error_num += 1;
 			}
@@ -116,9 +134,9 @@ static void update_statistics(enum CACHE_REQUEST_METHOD method, bool fail_state,
 			}
 			break;
 		case CACHE_REQUEST_GET:
-			if(fail_state)
+			if(ctx->fail_state)
 			{
-				if(error_code == CACHE_ERR_CURL)
+				if(ctx->error_code == CACHE_ERR_CURL)
 					statistic->get_error_num += 1;
 				else
 					statistic->get_miss_num += 1;
@@ -129,7 +147,7 @@ static void update_statistics(enum CACHE_REQUEST_METHOD method, bool fail_state,
 			}
 			break;	
 		case CACHE_REQUEST_DELETE:
-			if(fail_state)
+			if(ctx->fail_state)
 			{
 				statistic->del_error_num += 1;
 			}
@@ -138,6 +156,10 @@ static void update_statistics(enum CACHE_REQUEST_METHOD method, bool fail_state,
 				statistic->del_succ_num += 1;
 			}
 			break;
+		case CACHE_REQUEST_DELETE_MUL:
+			statistic->del_succ_num += ctx->del.succ_num;
+			statistic->del_error_num += ctx->del.fail_num;
+			break;
 		default:break;
 	}
 }
@@ -185,7 +207,6 @@ void tango_cache_ctx_destroy(struct tango_cache_ctx *ctx)
 		case CACHE_REQUEST_PUT:
 			if(ctx->put.uploadID != NULL) free(ctx->put.uploadID);
 			if(ctx->put.combine_xml != NULL) free(ctx->put.combine_xml);
-			if(ctx->headers != NULL) curl_slist_free_all(ctx->headers);
 			if(ctx->put.evbuf!=NULL)
 			{
 				ctx->instance->statistic.memory_used -= evbuffer_get_length(ctx->put.evbuf);
@@ -197,6 +218,11 @@ void tango_cache_ctx_destroy(struct tango_cache_ctx *ctx)
 				free(etag->etag);
 				free(etag);
 			}//no break here
+		case CACHE_REQUEST_DELETE_MUL:
+			if(ctx->headers != NULL)
+			{
+				curl_slist_free_all(ctx->headers);
+			}//no break here
 		case CACHE_REQUEST_DELETE:
 			if(ctx->future != NULL)
 			{
@@ -212,7 +238,7 @@ void tango_cache_ctx_destroy(struct tango_cache_ctx *ctx)
 			break;
 		default: break;
 	}
-	update_statistics(ctx->method, ctx->fail_state, ctx->error_code, &ctx->instance->statistic);
+	update_statistics(ctx, &ctx->instance->statistic);
 	free(ctx);
 }
 
@@ -333,7 +359,7 @@ struct tango_cache_ctx *tango_cache_update_prepare(struct tango_cache_instance *
 	{
 		ctx->headers = curl_slist_append(ctx->headers, "Content-Type:");
 	}
-	//ctx->headers = curl_slist_append(ctx->headers, "Expect:"); //不可以添加？curl_multi_socket_action会卡住
+	ctx->headers = curl_slist_append(ctx->headers, "Expect:");//注意POST方法与Expect关系，要明确给出CURLOPT_POSTFIELDSIZE
 	//其他定义的头部，GET时会原样返回
 	if(meta->usertag_len>0 && meta->usertag_len<=USER_TAG_MAX_LEN)
 	{
@@ -484,6 +510,46 @@ int tango_cache_delete_object(struct tango_cache_instance *instance, struct futu
 	return (cache_delete_minio_object(ctx)==1)?0:-1;
 }
 
+struct tango_cache_ctx *tango_cache_multi_delete_prepare(struct tango_cache_instance *instance, struct future* future, char *objlist[], u_int32_t num)
+{
+	struct tango_cache_ctx *ctx;
+	char md5[48]={0}, content_md5[48];
+
+	ctx = (struct tango_cache_ctx *)calloc(1, sizeof(struct tango_cache_ctx));
+	ctx->instance = instance;
+	ctx->future = future;
+	ctx->method = CACHE_REQUEST_DELETE_MUL;
+	ctx->del.succ_num = num;
+	
+	if(wired_load_balancer_lookup(instance->wiredlb, objlist[0], strlen(objlist[0]), ctx->hostaddr, 48))
+	{
+		instance->error_code = CACHE_ERR_WIREDLB;
+		instance->statistic.totaldrop_num += num;
+		free(ctx);
+		return NULL;
+	}
+
+	construct_multiple_delete_xml(ctx->instance->bucketname, objlist, num, instance->hash_object_key, &ctx->response.buff, &ctx->response.size);
+	caculate_base64_md5(ctx->response.buff, ctx->response.size, (unsigned char *)md5, 48);
+	sprintf(content_md5, "Content-MD5: %s", md5);
+	ctx->headers = curl_slist_append(ctx->headers, content_md5);
+	ctx->headers = curl_slist_append(ctx->headers, "Content-Type: application/xml");
+	return ctx;
+}
+
+//TODO: AccessDenied
+int tango_cache_multi_delete(struct tango_cache_instance *instance, struct future* future, char *objlist[], u_int32_t num)
+{
+	struct tango_cache_ctx *ctx;
+
+	ctx = tango_cache_multi_delete_prepare(instance, future, objlist, num);
+	if(ctx == NULL)
+	{
+		return -1;
+	}
+	return tango_cache_multi_delete_start(ctx);
+}
+
 static void check_multi_info(CURLM *multi)
 {
 	CURLMsg *msg;
@@ -520,6 +586,9 @@ static void check_multi_info(CURLM *multi)
 			case CACHE_REQUEST_DELETE:
 				tango_cache_curl_del_done(ctx, res, res_code);
 				break;
+			case CACHE_REQUEST_DELETE_MUL:
+				tango_cache_curl_muldel_done(ctx, res, res_code);
+				break;
 			default: break;
 		}
 	}
diff --git a/cache/tango_cache_client_in.h b/cache/tango_cache_client_in.h
index 3c2ab00..9e855bf 100644
--- a/cache/tango_cache_client_in.h
+++ b/cache/tango_cache_client_in.h
@@ -19,6 +19,7 @@ enum CACHE_REQUEST_METHOD
 	CACHE_REQUEST_GET=0,
 	CACHE_REQUEST_PUT,
 	CACHE_REQUEST_DELETE,
+	CACHE_REQUEST_DELETE_MUL,
 };
 
 enum GET_OBJECT_STATE
@@ -98,6 +99,12 @@ struct cache_ctx_data_put
 	bool close_state; //主动被调用关闭
 };
 
+struct cache_ctx_multi_delete
+{
+	u_int32_t succ_num;
+	u_int32_t fail_num;
+};
+
 struct tango_cache_ctx
 {
 	CURL *curl;
@@ -117,6 +124,7 @@ struct tango_cache_ctx
 	union{
 		struct cache_ctx_data_put put;
 		struct cache_ctx_data_get get;
+		struct cache_ctx_multi_delete del;
 	};
 	struct tango_cache_instance *instance;
 };
@@ -126,6 +134,8 @@ struct curl_socket_data
 	struct event sock_event;
 };
 
+void caculate_sha256(const char *data, unsigned long len, char *result, u_int32_t size);
+
 void easy_string_savedata(struct easy_string *estr, const char *data, size_t len);
 void easy_string_destroy(struct easy_string *estr);
 
diff --git a/cache/tango_cache_transfer.cpp b/cache/tango_cache_transfer.cpp
index 8945abb..55b0cb6 100644
--- a/cache/tango_cache_transfer.cpp
+++ b/cache/tango_cache_transfer.cpp
@@ -141,7 +141,7 @@ static int http_put_bodypart_request_evbuf(struct tango_cache_ctx *ctx, bool ful
 	return 1;
 }
 
-static size_t curl_write_uploadID_cb(void *ptr, size_t size, size_t count, void *userp)
+static size_t curl_response_body_save_cb(void *ptr, size_t size, size_t count, void *userp)
 {
 	struct tango_cache_ctx *ctx = (struct tango_cache_ctx *)userp;
 	struct easy_string *estr = &ctx->response;
@@ -158,7 +158,6 @@ static size_t curl_write_uploadID_cb(void *ptr, size_t size, size_t count, void
 		if(code != CURLE_OK || ctx->res_code!=200L)
 		{
 			tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
-			if(code != CURLE_OK) MESA_HANDLE_RUNTIME_LOGV2(ctx->instance->runtime_log, RLOG_LV_DEBUG, "%s", ctx->error);
 			return size*count;
 		}
 	}
@@ -180,11 +179,12 @@ int curl_get_minio_uploadID(struct tango_cache_ctx *ctx)
 	
 	snprintf(minio_url, 256, "http://%s/%s/%s?uploads", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key);
 	curl_easy_setopt(ctx->curl, CURLOPT_POST, 1L);
+	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDSIZE, 0); //默认使用回调函数调用fread，测试发现关闭Expect时会导致卡在curl_multi_socket_action
 	curl_easy_setopt(ctx->curl, CURLOPT_URL, minio_url);
 
 	curl_easy_setopt(ctx->curl, CURLOPT_USERAGENT, "aws-sdk-cpp/1.5.24 Linux/3.10.0-327.el7.x86_64 x86_64 pangu_cache");
 	curl_easy_setopt(ctx->curl, CURLOPT_NOSIGNAL,1L);
-	curl_easy_setopt(ctx->curl, CURLOPT_WRITEFUNCTION, curl_write_uploadID_cb);
+	curl_easy_setopt(ctx->curl, CURLOPT_WRITEFUNCTION, curl_response_body_save_cb);
 	curl_easy_setopt(ctx->curl, CURLOPT_WRITEDATA, ctx);
 	curl_easy_setopt(ctx->curl, CURLOPT_ERRORBUFFER, ctx->error);
 	curl_easy_setopt(ctx->curl, CURLOPT_PRIVATE, ctx);
@@ -280,8 +280,8 @@ bool cache_kick_combine_minio(struct tango_cache_ctx *ctx)
 	curl_easy_setopt(ctx->curl, CURLOPT_FOLLOWLOCATION, 1L);
 	curl_easy_setopt(ctx->curl, CURLOPT_CONNECTTIMEOUT_MS, 500L);
 	
-	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDS, ctx->put.combine_xml);
 	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDSIZE, len); //填充Content-Length
+	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDS, ctx->put.combine_xml);
 
 	if(ctx->headers != NULL)
 	{
@@ -419,7 +419,6 @@ void tango_cache_curl_put_done(struct tango_cache_ctx *ctx, CURLcode res, long r
 			{
 				easy_string_destroy(&ctx->response);
 				tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
-				if(res != CURLE_OK) MESA_HANDLE_RUNTIME_LOGV2(ctx->instance->runtime_log, RLOG_LV_DEBUG, "%s", ctx->error);
 				if(ctx->put.close_state)
 				{
 					tango_cache_ctx_destroy(ctx);
@@ -448,7 +447,6 @@ void tango_cache_curl_put_done(struct tango_cache_ctx *ctx, CURLcode res, long r
 			if(res != CURLE_OK || res_code!=200L)
 			{
 				tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
-				if(res != CURLE_OK) MESA_HANDLE_RUNTIME_LOGV2(ctx->instance->runtime_log, RLOG_LV_DEBUG, "%s", ctx->error);
 			}
 			if(ctx->fail_state)
 			{
@@ -486,7 +484,6 @@ void tango_cache_curl_put_done(struct tango_cache_ctx *ctx, CURLcode res, long r
 			if(res != CURLE_OK || res_code!=200L)
 			{
 				tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
-				if(res != CURLE_OK) MESA_HANDLE_RUNTIME_LOGV2(ctx->instance->runtime_log, RLOG_LV_DEBUG, "%s", ctx->error);
 			}
 			tango_cache_ctx_destroy(ctx);
 			break;
@@ -579,11 +576,77 @@ void tango_cache_curl_del_done(struct tango_cache_ctx *ctx, CURLcode res, long r
 {
 	if(res!=CURLE_OK || (res_code!=204L && res_code!=200L ))
 	{
-		ctx->fail_state = true;
+		tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
 	}
 	tango_cache_ctx_destroy(ctx);
 }
 
+void tango_cache_curl_muldel_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code)
+{
+	u_int32_t errnum=0;
+	
+	if(res!=CURLE_OK || (res_code!=204L && res_code!=200L ))
+	{
+		tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
+		ctx->del.fail_num = ctx->del.succ_num;
+		ctx->del.succ_num = 0;
+	}
+	else
+	{
+		if(!parse_multidelete_xml(ctx->response.buff, ctx->response.len, &errnum, ctx->error, CURL_ERROR_SIZE))
+		{
+			ctx->del.fail_num = ctx->del.succ_num;
+			ctx->del.succ_num = 0;
+		}
+		else
+		{
+			ctx->del.fail_num = errnum;
+			ctx->del.succ_num -= errnum;
+		}
+		if(ctx->del.fail_num > 0)
+		{
+			tango_cache_set_fail_state(ctx, CACHE_ERR_CURL);
+		}
+	}
+	tango_cache_ctx_destroy(ctx);
+}
+
+int tango_cache_multi_delete_start(struct tango_cache_ctx *ctx)
+{
+	CURLMcode rc;
+	char minio_url[256];
+
+	ctx->instance->statistic.del_recv_num += ctx->del.succ_num;
+	ctx->instance->error_code = CACHE_OK;
+	if(NULL == (ctx->curl=curl_easy_init())) 
+	{
+		tango_cache_ctx_destroy(ctx);
+		return -1;
+	}
+
+	snprintf(minio_url, 256, "http://%s/%s/?delete", ctx->hostaddr, ctx->instance->bucketname);
+	curl_easy_setopt(ctx->curl, CURLOPT_POST, 1L);
+	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDSIZE, ctx->response.size); //填充Content-Length，在CURLOPT_COPYPOSTFIELDS之前设置
+	curl_easy_setopt(ctx->curl, CURLOPT_COPYPOSTFIELDS, ctx->response.buff);
+	curl_easy_setopt(ctx->curl, CURLOPT_URL, minio_url);
+	curl_easy_setopt(ctx->curl, CURLOPT_USERAGENT, "aws-sdk-cpp/1.5.24 Linux/3.10.0-327.el7.x86_64 x86_64 pangu_cache");
+	curl_easy_setopt(ctx->curl, CURLOPT_HTTPHEADER, ctx->headers);
+	curl_easy_setopt(ctx->curl, CURLOPT_NOSIGNAL, 1L);
+	curl_easy_setopt(ctx->curl, CURLOPT_WRITEFUNCTION, curl_response_body_save_cb);
+	curl_easy_setopt(ctx->curl, CURLOPT_WRITEDATA, ctx);
+	curl_easy_setopt(ctx->curl, CURLOPT_ERRORBUFFER, ctx->error);
+	curl_easy_setopt(ctx->curl, CURLOPT_PRIVATE, ctx);
+	curl_easy_setopt(ctx->curl, CURLOPT_FOLLOWLOCATION, 1L);
+	curl_easy_setopt(ctx->curl, CURLOPT_CONNECTTIMEOUT_MS, 500L); 
+	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_TIME, 2L);
+	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
+
+	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
+	assert(rc==CURLM_OK);
+	easy_string_destroy(&ctx->response);
+	return 0;
+}
+
 void tango_cache_curl_get_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code)
 {
 	switch(ctx->get.state)
diff --git a/cache/tango_cache_transfer.h b/cache/tango_cache_transfer.h
index 1f1d5b5..f976fd1 100644
--- a/cache/tango_cache_transfer.h
+++ b/cache/tango_cache_transfer.h
@@ -9,8 +9,11 @@
 void tango_cache_curl_put_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code);
 void tango_cache_curl_get_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code);
 void tango_cache_curl_del_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code);
+void tango_cache_curl_muldel_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code);
 
 int cache_delete_minio_object(struct tango_cache_ctx *ctx);
+int tango_cache_multi_delete_start(struct tango_cache_ctx *ctx);
+
 int cache_kick_upload_minio_end(struct tango_cache_ctx *ctx);
 bool cache_kick_upload_minio_multipart(struct tango_cache_ctx *ctx, size_t block_len);
 
diff --git a/cache/tango_cache_xml.cpp b/cache/tango_cache_xml.cpp
index d7d7a80..2b26b4e 100644
--- a/cache/tango_cache_xml.cpp
+++ b/cache/tango_cache_xml.cpp
@@ -46,7 +46,7 @@ bool parse_uploadID_xml(const char *content, int len, char **uploadID)
 	return false;
 }
 
-int construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len)
+void construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len)
 {
 	struct multipart_etag_list *etag;
 	xmlDoc *pdoc;
@@ -68,6 +68,104 @@ int construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len)
 	
 	xmlDocDumpFormatMemory(pdoc, (xmlChar **)xml, len, 1);
 	xmlFreeDoc(pdoc);
-	return 0;
+}
+
+static void fill_multidelete_xml_errcode(xmlNode *error, char *out, int size)
+{
+	xmlChar *errcode;
+	xmlNode *child = error->children;
+
+	while(child != NULL)
+	{
+		if(child->type != XML_ELEMENT_NODE || xmlStrcmp(child->name, (const xmlChar *)"Message"))
+		{
+			child = child->next;
+			continue;
+		}
+		errcode = xmlNodeGetContent(child);
+		snprintf(out, size, "%s", (char *)errcode);
+		xmlFree(errcode);
+		break;
+	}
+}
+
+bool parse_multidelete_xml(const char *xml, int len, u_int32_t *errnum, char *errstr, int size)
+{
+	xmlDoc *pdoc;
+	xmlNode *pcur;
+	int errornum=0;
+	
+	if((pdoc = xmlParseMemory(xml, len)) == NULL)
+	{
+		return false;
+	}
+	if((pcur = xmlDocGetRootElement(pdoc)) == NULL)
+	{
+		xmlFreeDoc(pdoc);
+		return false;
+	}
+
+	while(pcur->type != XML_ELEMENT_NODE)
+		pcur = pcur->next;
+	if(xmlStrcmp(pcur->name, (const xmlChar *)"DeleteResult"))
+	{
+		xmlFreeDoc(pdoc);
+		return false;
+	}
+	pcur = pcur->children;
+	while(pcur != NULL)
+	{
+		if(pcur->type != XML_ELEMENT_NODE || xmlStrcmp(pcur->name, (const xmlChar *)"Error"))
+		{
+			pcur = pcur->next;
+			continue;
+		}
+		if(errornum == 0)
+		{
+			fill_multidelete_xml_errcode(pcur, errstr, size);
+		}
+		errornum++;
+		pcur = pcur->next;
+	}
+	*errnum = errornum;
+
+	xmlFreeDoc(pdoc);
+	return true;
+}
+
+void construct_multiple_delete_xml(const char *bucket, char *key[], u_int32_t num, int is_hash, char **xml, size_t *len)
+{
+	xmlDoc *pdoc;
+	xmlNode *root, *child;
+	int xmllen;
+
+	pdoc = xmlNewDoc((const xmlChar *)"1.0");
+	root = xmlNewNode(NULL, (const xmlChar *)"Delete");
+	xmlDocSetRootElement(pdoc, root);
+
+	xmlNewChild(root, NULL, (const xmlChar*)"Quiet", (const xmlChar*)"true");
+
+	if(is_hash)
+	{
+		char hashkey[72], sha256[72];
+		for(u_int32_t i=0; i<num; i++)
+		{
+			child = xmlNewChild(root, NULL, (const xmlChar*)"Object", NULL);			
+			caculate_sha256(key[i], strlen(key[i]), sha256, 72);
+			snprintf(hashkey, 256, "%c%c/%c%c/%s", sha256[0], sha256[1], sha256[2], sha256[3], sha256+4);
+			xmlNewChild(child, NULL, (const xmlChar*)"Key", (const xmlChar*)hashkey);
+		}
+	}
+	else
+	{
+		for(u_int32_t i=0; i<num; i++)
+		{
+			child = xmlNewChild(root, NULL, (const xmlChar*)"Object", NULL);
+			xmlNewChild(child, NULL, (const xmlChar*)"Key", (const xmlChar*)key[i]);
+		}
+	}
+	xmlDocDumpFormatMemoryEnc(pdoc, (xmlChar **)xml, &xmllen, "UTF-8", 1);
+	xmlFreeDoc(pdoc);
+	*len = xmllen;
 }
 
diff --git a/cache/tango_cache_xml.h b/cache/tango_cache_xml.h
index ebc4bd1..43543dc 100644
--- a/cache/tango_cache_xml.h
+++ b/cache/tango_cache_xml.h
@@ -4,7 +4,9 @@
 #include "tango_cache_client_in.h"
 
 bool parse_uploadID_xml(const char *content, int len, char **uploadID);
-int construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len);
+void construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len);
+void construct_multiple_delete_xml(const char *bucket, char *key[], u_int32_t num, int is_hash, char **xml, size_t *len);
+bool parse_multidelete_xml(const char *xml, int len, u_int32_t *errnum, char *errstr, int size);
 
 #endif
 
diff --git a/cache/test_demo/tango_cache_test.c b/cache/test_demo/tango_cache_test.c
index 39675bf..b8102c0 100644
--- a/cache/test_demo/tango_cache_test.c
+++ b/cache/test_demo/tango_cache_test.c
@@ -97,6 +97,23 @@ void put_future_failed(enum e_future_error err, const char * what, void * user)
 	free(pdata);
 }
 
+void del_future_success(future_result_t* result, void * user)
+{
+	struct future_pdata *pdata = (struct future_pdata *)user;
+
+	printf("DEL %s succ\n", pdata->filename);
+	future_destroy(pdata->future);
+	free(pdata);
+}
+void del_future_failed(enum e_future_error err, const char * what, void * user)
+{
+	struct future_pdata *pdata = (struct future_pdata *)user;
+
+	printf("DEL %s fail: %s\n", pdata->filename, what);
+	future_destroy(pdata->future);
+	free(pdata);
+}
+
 char * get_file_content(const char *filename, size_t *filelen_out)
 {
 	char *buffer;
@@ -136,6 +153,8 @@ char * get_file_content(const char *filename, size_t *filelen_out)
 	return buffer;
 }
 
+int tango_cache_multi_delete(struct tango_cache_instance *instance, struct future* future, char *objlist[], u_int32_t num);
+
 static void dummy_accept_callback(evutil_socket_t fd, short events, void *arg)
 {
 	char s[1024];
@@ -144,6 +163,9 @@ static void dummy_accept_callback(evutil_socket_t fd, short events, void *arg)
 	FILE *input = (FILE *)arg;
 	static int index=0;
 	char filename[128], method[16], buffer[1024], *p;
+	char *dellist[16];
+	char *pstart, *save_ptr=NULL;
+	int delnum=0;
 	struct tango_cache_meta meta;
 	struct future_pdata *pdata;
 
@@ -207,6 +229,25 @@ static void dummy_accept_callback(evutil_socket_t fd, short events, void *arg)
 				fclose(fp);
 				tango_cache_upload_once_evbuf(tango_instance, pdata->future, EVBUFFER_MOVE, evbuf, &meta, pdata->filename, 256);
 			}
+			else if(!strcasecmp(p, "DEL"))
+			{
+				pdata->future = future_create(del_future_success, del_future_failed, pdata);
+				promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
+				sprintf(pdata->filename, "%s", s);
+				tango_cache_delete_object(tango_instance, pdata->future, s);
+			}
+			else if(!strcasecmp(p, "DELMUL")) //TODO
+			{
+				pdata->future = future_create(del_future_success, del_future_failed, pdata);
+				promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
+				sprintf(pdata->filename, "%s", s);
+
+				for(pstart = strtok_r(s, ";", &save_ptr); pstart != NULL; pstart = strtok_r(NULL, ";", &save_ptr))
+				{
+					dellist[delnum++] = pstart;
+				}
+				tango_cache_multi_delete(tango_instance, pdata->future, dellist, delnum);
+			}
 			else
 			{
 				pdata->future = future_create(put_future_success, put_future_failed, pdata);