diff --git a/cache/src/tango_cache_client.cpp b/cache/src/tango_cache_client.cpp
index c6fa89d..54dd8b7 100644
--- a/cache/src/tango_cache_client.cpp
+++ b/cache/src/tango_cache_client.cpp
@@ -261,12 +261,12 @@ int tango_cache_update_frag_data(struct tango_cache_ctx *ctx, const char *data,
 {
 	if(ctx->fail_state)
 	{
-		return -1;
+		return 0; //TODO: 暂时忽略返回值!!
 	}
 	if(evbuffer_add(ctx->put.evbuf, data, size))
 	{
 		tango_cache_set_fail_state(ctx, CACHE_OUTOF_MEMORY);
-		return -1;
+		return 0;
 	}
 	ctx->instance->statistic.memory_used += size;
 	if(evbuffer_get_length(ctx->put.evbuf) >= ctx->instance->upload_block_size)
@@ -282,7 +282,7 @@ int tango_cache_update_frag_evbuf(struct tango_cache_ctx *ctx, enum EVBUFFER_COP
 	
 	if(ctx->fail_state)
 	{
-		return -1;
+		return 0;//TODO: 暂时忽略返回值!!
 	}
 	
 	size = evbuffer_get_length(evbuf);
@@ -291,7 +291,7 @@ int tango_cache_update_frag_evbuf(struct tango_cache_ctx *ctx, enum EVBUFFER_COP
 		if(evbuffer_add_buffer(ctx->put.evbuf, evbuf))
 		{
 			tango_cache_set_fail_state(ctx, CACHE_OUTOF_MEMORY);
-			return -1;
+			return 0;
 		}
 	}
 	else
@@ -299,7 +299,7 @@ int tango_cache_update_frag_evbuf(struct tango_cache_ctx *ctx, enum EVBUFFER_COP
 		if(evbuffer_add_buffer_reference(ctx->put.evbuf, evbuf))
 		{
 			tango_cache_set_fail_state(ctx, CACHE_OUTOF_MEMORY);
-			return -1;
+			return 0;
 		}
 	}
 	ctx->instance->statistic.memory_used += size;
diff --git a/cache/src/tango_cache_client_in.h b/cache/src/tango_cache_client_in.h
index a9b7688..123a84d 100644
--- a/cache/src/tango_cache_client_in.h
+++ b/cache/src/tango_cache_client_in.h
@@ -158,7 +158,6 @@ void easy_string_destroy(struct easy_string *estr);
 
 void tango_cache_ctx_destroy(struct tango_cache_ctx *ctx, bool callback=true);
 void tango_cache_set_fail_state(struct tango_cache_ctx *ctx, enum CACHE_ERR_CODE error_code);
-const char *tango_cache_errcode2str(enum CACHE_ERR_CODE err_code);
 const char *tango_cache_get_errstring(const struct tango_cache_ctx *ctx);
 
 struct tango_cache_ctx *tango_cache_update_prepare(struct tango_cache_instance *instance, struct future* f, struct tango_cache_meta_put *meta);
diff --git a/cache/src/tango_cache_transfer.cpp b/cache/src/tango_cache_transfer.cpp
index 20dd2f6..c404e77 100644
--- a/cache/src/tango_cache_transfer.cpp
+++ b/cache/src/tango_cache_transfer.cpp
@@ -13,6 +13,19 @@
 #include "tango_cache_xml.h"
 #include "tango_cache_tools.h"
 
+static inline void curl_set_common_options(CURL *curl, long transfer_timeout, char *errorbuf)
+{
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorbuf);
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
+	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT_MS, 500L); 
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, transfer_timeout); //测试发现多链接有某链接接收卡住的情况
+	//ctx->error="Operation too slow. Less than 1024 bytes/sec transferred the last 3 seconds"
+	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 2L);
+	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
+	curl_easy_setopt(curl, CURLOPT_USERAGENT, "aws-sdk-cpp/1.5.24 Linux/3.10.0-327.el7.x86_64 x86_64 pangu_cache");
+}
+
 //response body很短或不关心时
 size_t curl_response_any_cb(void *ptr, size_t size, size_t count, void *userp)
 {
@@ -119,23 +132,16 @@ static int http_put_bodypart_request_evbuf(struct tango_cache_ctx *ctx, bool ful
 		curl_easy_setopt(ctx->curl, CURLOPT_HEADERDATA, ctx);
 	}
 	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_response_any_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_TIMEOUT, ctx->instance->transfer_timeout); //测试发现有某链接接收卡住的情况
 	curl_easy_setopt(ctx->curl, CURLOPT_HTTPHEADER, ctx->headers);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_TIME, 2L);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
 
 	curl_easy_setopt(ctx->curl, CURLOPT_UPLOAD, 1L);
 	curl_easy_setopt(ctx->curl, CURLOPT_INFILESIZE, ctx->put.upload_length);
 	curl_easy_setopt(ctx->curl, CURLOPT_READFUNCTION, curl_put_multipart_send_cb);
 	curl_easy_setopt(ctx->curl, CURLOPT_READDATA, ctx);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
@@ -183,17 +189,11 @@ int curl_get_minio_uploadID(struct tango_cache_ctx *ctx)
 	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_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_HTTPHEADER, ctx->headers);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_TIME, 2L);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
@@ -217,14 +217,10 @@ int cache_delete_minio_object(struct tango_cache_ctx *ctx, bool call_back)
 	snprintf(minio_url, 256, "http://%s/%s/%s", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key);
 	curl_easy_setopt(ctx->curl, CURLOPT_CUSTOMREQUEST, "DELETE");
 	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_response_any_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_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
@@ -245,14 +241,10 @@ bool cache_cancel_upload_minio(struct tango_cache_ctx *ctx)
 	snprintf(minio_url, 256, "http://%s/%s/%s?uploadId=%s", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key, ctx->put.uploadID);
 	curl_easy_setopt(ctx->curl, CURLOPT_CUSTOMREQUEST, "DELETE");
 	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_response_any_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_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
@@ -275,17 +267,13 @@ bool cache_kick_combine_minio(struct tango_cache_ctx *ctx)
 	snprintf(minio_url, 256, "http://%s/%s/%s?uploadId=%s", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key, ctx->put.uploadID);
 	curl_easy_setopt(ctx->curl, CURLOPT_POST, 1L);
 	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_response_any_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_POSTFIELDSIZE, len); //填充Content-Length
 	curl_easy_setopt(ctx->curl, CURLOPT_POSTFIELDS, ctx->put.combine_xml);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	if(ctx->headers != NULL)
 	{
@@ -508,18 +496,11 @@ int tango_cache_upload_once_start_data(struct tango_cache_ctx *ctx, enum PUT_MEM
 
 	snprintf(minio_url, 256, "http://%s/%s/%s", ctx->hostaddr, ctx->instance->bucketname, ctx->object_key);
 	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_response_any_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_TIMEOUT, ctx->instance->transfer_timeout); //测试发现有某链接接收卡住的情况
 	curl_easy_setopt(ctx->curl, CURLOPT_HTTPHEADER, ctx->headers);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_TIME, 2L);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	if(way == PUT_MEM_COPY)
 	{
@@ -632,17 +613,11 @@ int tango_cache_multi_delete_start(struct tango_cache_ctx *ctx, bool callback)
 	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);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
@@ -878,20 +853,12 @@ int tango_cache_fetch_start(struct tango_cache_ctx *ctx)
 	{
 		curl_easy_setopt(ctx->curl, CURLOPT_NOBODY, 1L);
 	}
-	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_get_response_body_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_TIMEOUT, ctx->instance->transfer_timeout); //测试发现有某链接接收卡住的情况
 	curl_easy_setopt(ctx->curl, CURLOPT_HEADERFUNCTION, curl_get_response_header_cb);
 	curl_easy_setopt(ctx->curl, CURLOPT_HEADERDATA, ctx);
-	//ctx->error="Operation too slow. Less than 1024 bytes/sec transferred the last 3 seconds"
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_TIME, 2L);
-	curl_easy_setopt(ctx->curl, CURLOPT_LOW_SPEED_LIMIT, 100L);
+	curl_set_common_options(ctx->curl, ctx->instance->transfer_timeout, ctx->error);
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
diff --git a/cache/test/cache_evbase_test_threads.cpp b/cache/test/cache_evbase_test_threads.cpp
index 9d3827b..b792bea 100644
--- a/cache/test/cache_evbase_test_threads.cpp
+++ b/cache/test/cache_evbase_test_threads.cpp
@@ -193,7 +193,6 @@ void* thread_upload_download(void *arg)
 		{
 			sprintf(filename_out, "file_index_%d_%d.bin", thread_data->thread_id, i);
 			pdata->future = future_create(get_future_success, get_future_failed, pdata);
-			promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
 			pdata->fp = fopen(filename_out, "w");
 			
 			cache_evbase_fetch_object(instance_asyn, pdata->future, &getmeta);
@@ -201,7 +200,6 @@ void* thread_upload_download(void *arg)
 		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", filename_in);
 			cache_evbase_delete_object(instance_asyn, pdata->future, filename_in);
 		}
@@ -210,7 +208,6 @@ void* thread_upload_download(void *arg)
 			size_t filelen;
 			p = get_file_content(filename_in, &filelen);
 			pdata->future = future_create(put_future_success, put_future_failed, pdata);
-			promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
 			
 			if(cache_evbase_upload_once_data(instance_asyn, pdata->future, PUT_MEM_FREE, p, filelen, &putmeta, pdata->filename, 256))
 			{
@@ -223,7 +220,6 @@ void* thread_upload_download(void *arg)
 		{
 			size_t readlen;
 			pdata->future = future_create(put_future_success, put_future_failed, pdata);
-			promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
 			struct evbuffer *evbuf = evbuffer_new();
 			char buffer[1024];
 			
@@ -249,7 +245,6 @@ void* thread_upload_download(void *arg)
 		else
 		{
 			pdata->future = future_create(put_future_success, put_future_failed, pdata);
-			promise_set_ctx(future_to_promise(pdata->future), NULL, NULL);
 
 			ctx = cache_evbase_update_start(instance_asyn, pdata->future, &putmeta);
 			if(ctx==NULL)
diff --git a/cache/test/lib/libhiredis.a b/cache/test/lib/libhiredis.a
index 670ea58..e0c95b6 100644
Binary files a/cache/test/lib/libhiredis.a and b/cache/test/lib/libhiredis.a differ
diff --git a/cache/test/tango_cache_test.c b/cache/test/tango_cache_test.c
index 560673c..19c6b19 100644
--- a/cache/test/tango_cache_test.c
+++ b/cache/test/tango_cache_test.c
@@ -312,7 +312,7 @@ static void dummy_accept_callback(evutil_socket_t fd, short events, void *arg)
 				ctx = tango_cache_update_start(tango_instance, pdata->future, &putmeta);
 				if(ctx==NULL)
 				{
-					put_future_failed(FUTURE_ERROR_CANCEL, "NULL", pdata);
+					put_future_failed(FUTURE_ERROR_CANCEL, "tango_cache_update_start_NULL", pdata);
 					continue;
 				}
 				tango_cache_get_object_path(ctx, pdata->filename, 256);