diff --git a/HISTORY b/HISTORY
index 152488a..907a21a 100644
--- a/HISTORY
+++ b/HISTORY
@@ -2,6 +2,7 @@
 Version 5.05  2014-11-22
  * tracker_mem.c log more info
  * remove useless global variable: g_network_tv
+ * storage can fetch it's group_name from tracker server
 
 Version 5.04  2014-09-16
  * add fastdfs.spec for build RPM on Linux
diff --git a/conf/storage.conf b/conf/storage.conf
index 47fe053..e93a071 100644
--- a/conf/storage.conf
+++ b/conf/storage.conf
@@ -4,6 +4,10 @@
 disabled=false
 
 # the name of the group this storage server belongs to
+#
+# comment or remove this item for fetching from tracker server,
+# in this case, use_storage_id must set to true in tracker.conf,
+# and storage_ids.conf must be configed correctly.
 group_name=group1
 
 # bind an address of this host
diff --git a/make.sh b/make.sh
index 1c47f72..7d3f44d 100755
--- a/make.sh
+++ b/make.sh
@@ -198,6 +198,7 @@ if [ "$1" = "install" ]; then
         cp -f conf/tracker.conf $TARGET_CONF_PATH/tracker.conf.sample
         cp -f conf/storage.conf $TARGET_CONF_PATH/storage.conf.sample
         cp -f conf/client.conf $TARGET_CONF_PATH/client.conf.sample
+        cp -f conf/storage_ids.conf $TARGET_CONF_PATH/storage_ids.conf.sample
       fi
       mkdir -p $TARGET_INIT_PATH
       cp -f init.d/fdfs_trackerd $TARGET_INIT_PATH
diff --git a/storage/storage_func.c b/storage/storage_func.c
index b03e522..bf03bc3 100644
--- a/storage/storage_func.c
+++ b/storage/storage_func.c
@@ -124,6 +124,85 @@ static int storage_close_stat_file();
 static int storage_make_data_dirs(const char *pBasePath, bool *pathCreated);
 static int storage_check_and_make_data_dirs();
 
+static int storage_do_get_group_name(ConnectionInfo *pTrackerServer)
+{
+	char out_buff[sizeof(TrackerHeader) + 4];
+	TrackerHeader *pHeader;
+	char *pInBuff;
+	int64_t in_bytes;
+	int result;
+
+	pHeader = (TrackerHeader *)out_buff;
+	memset(out_buff, 0, sizeof(out_buff));
+	long2buff(4, pHeader->pkg_len);
+    int2buff(g_server_port, out_buff + sizeof(TrackerHeader));
+	pHeader->cmd = TRACKER_PROTO_CMD_STORAGE_GET_GROUP_NAME;
+	if ((result=tcpsenddata_nb(pTrackerServer->sock, out_buff, \
+			sizeof(out_buff), g_fdfs_network_timeout)) != 0)
+	{
+		logError("file: "__FILE__", line: %d, " \
+			"tracker server %s:%d, send data fail, " \
+			"errno: %d, error info: %s.", \
+			__LINE__, pTrackerServer->ip_addr, \
+			pTrackerServer->port, \
+			result, STRERROR(result));
+		return result;
+	}
+
+	pInBuff = g_group_name;
+	if ((result=fdfs_recv_response(pTrackerServer, \
+		&pInBuff, FDFS_GROUP_NAME_MAX_LEN, &in_bytes)) != 0)
+	{
+		return result;
+	}
+
+	if (in_bytes != FDFS_GROUP_NAME_MAX_LEN)
+	{
+		logError("file: "__FILE__", line: %d, " \
+			"tracker server %s:%d, recv body length: " \
+			"%"PRId64" != %d",  \
+			__LINE__, pTrackerServer->ip_addr, \
+			pTrackerServer->port, in_bytes, FDFS_GROUP_NAME_MAX_LEN);
+		return EINVAL;
+	}
+
+	return 0;
+}
+
+static int storage_get_group_name_from_tracker()
+{
+	ConnectionInfo *pTrackerServer;
+	ConnectionInfo *pServerEnd;
+	ConnectionInfo *pTrackerConn;
+	ConnectionInfo tracker_server;
+	int result;
+
+	result = ENOENT;
+	pServerEnd = g_tracker_group.servers + g_tracker_group.server_count;
+	for (pTrackerServer=g_tracker_group.servers; \
+		pTrackerServer<pServerEnd; pTrackerServer++)
+	{
+		memcpy(&tracker_server, pTrackerServer, \
+			sizeof(ConnectionInfo));
+		tracker_server.sock = -1;
+        if ((pTrackerConn=tracker_connect_server(&tracker_server, \
+			&result)) == NULL)
+		{
+			continue;
+		}
+
+        result = storage_do_get_group_name(pTrackerConn);
+		tracker_disconnect_server_ex(pTrackerConn, \
+			result != 0 && result != ENOENT);
+		if (result == 0)
+		{
+			return 0;
+		}
+	}
+
+	return result;
+}
+
 static int tracker_get_my_server_id()
 {
 	struct in_addr ip_addr;
@@ -1084,37 +1163,6 @@ int storage_func_init(const char *filename, \
 		g_client_bind_addr = iniGetBoolValue(NULL, "client_bind", \
 					&iniContext, true);
 
-		pGroupName = iniGetStrValue(NULL, "group_name", &iniContext);
-		if (pGroupName == NULL)
-		{
-			logError("file: "__FILE__", line: %d, " \
-				"conf file \"%s\" must have item " \
-				"\"group_name\"!", \
-				__LINE__, filename);
-			result = ENOENT;
-			break;
-		}
-		if (pGroupName[0] == '\0')
-		{
-			logError("file: "__FILE__", line: %d, " \
-				"conf file \"%s\", " \
-				"group_name is empty!", \
-				__LINE__, filename);
-			result = EINVAL;
-			break;
-		}
-
-		snprintf(g_group_name, sizeof(g_group_name), "%s", pGroupName);
-		if ((result=fdfs_validate_group_name(g_group_name)) != 0) \
-		{
-			logError("file: "__FILE__", line: %d, " \
-				"conf file \"%s\", " \
-				"the group name \"%s\" is invalid!", \
-				__LINE__, filename, g_group_name);
-			result = EINVAL;
-			break;
-		}
-
 		result = fdfs_load_tracker_group_ex(&g_tracker_group, \
 				filename, &iniContext);
 		if (result != 0)
@@ -1143,6 +1191,50 @@ int storage_func_init(const char *filename, \
 			break;
 		}
 
+		pGroupName = iniGetStrValue(NULL, "group_name", &iniContext);
+		if (pGroupName == NULL)
+		{
+            result = storage_get_group_name_from_tracker();
+            if (result == 0)
+            {
+                logInfo("file: "__FILE__", line: %d, " \
+                        "get group name from tracker server, group_name: %s",
+                        __LINE__, g_group_name);
+            }
+            else
+            {
+                logError("file: "__FILE__", line: %d, " \
+                        "conf file \"%s\" must have item " \
+                        "\"group_name\"!", \
+                        __LINE__, filename);
+                result = ENOENT;
+                break;
+            }
+		}
+        else if (pGroupName[0] == '\0')
+		{
+			logError("file: "__FILE__", line: %d, " \
+				"conf file \"%s\", " \
+				"group_name is empty!", \
+				__LINE__, filename);
+			result = EINVAL;
+			break;
+		}
+        else
+        {
+		    snprintf(g_group_name, sizeof(g_group_name), "%s", pGroupName);
+        }
+
+		if ((result=fdfs_validate_group_name(g_group_name)) != 0) \
+		{
+			logError("file: "__FILE__", line: %d, " \
+				"conf file \"%s\", " \
+				"the group name \"%s\" is invalid!", \
+				__LINE__, filename, g_group_name);
+			result = EINVAL;
+			break;
+		}
+
 		g_sync_wait_usec = iniGetIntValue(NULL, "sync_wait_msec",\
 			 &iniContext, STORAGE_DEF_SYNC_WAIT_MSEC);
 		if (g_sync_wait_usec <= 0)
diff --git a/tracker/fdfs_shared_func.c b/tracker/fdfs_shared_func.c
index 6688ca3..c0f0c58 100644
--- a/tracker/fdfs_shared_func.c
+++ b/tracker/fdfs_shared_func.c
@@ -18,6 +18,8 @@
 
 FDFSStorageIdInfo *g_storage_ids_by_ip = NULL;  //sorted by group name and storage IP
 FDFSStorageIdInfo **g_storage_ids_by_id = NULL; //sorted by storage ID
+static FDFSStorageIdInfo **g_storage_ids_by_ip_port = NULL;  //sorted by storage ip and port
+
 int g_storage_id_count = 0;
 
 int fdfs_get_tracker_leader_index_ex(TrackerServerGroup *pServerGroup, \
@@ -301,6 +303,20 @@ static int fdfs_cmp_server_id(const void *p1, const void *p2)
 		(*((FDFSStorageIdInfo **)p2))->id);
 }
 
+static int fdfs_cmp_ip_and_port(const void *p1, const void *p2)
+{
+	int result;
+    result = strcmp((*((FDFSStorageIdInfo **)p1))->ip_addr,
+            (*((FDFSStorageIdInfo **)p2))->ip_addr);
+    if (result != 0)
+    {
+        return result;
+    }
+
+    return (*((FDFSStorageIdInfo **)p1))->port -
+        (*((FDFSStorageIdInfo **)p2))->port;
+}
+
 FDFSStorageIdInfo *fdfs_get_storage_id_by_ip(const char *group_name, \
 		const char *pIpAddr)
 {
@@ -335,6 +351,117 @@ FDFSStorageIdInfo *fdfs_get_storage_by_id(const char *id)
 	}
 }
 
+static int fdfs_init_ip_port_array()
+{
+    int result;
+    int alloc_bytes;
+    int i;
+    int port_count;
+    FDFSStorageIdInfo *previous;
+
+    alloc_bytes = sizeof(FDFSStorageIdInfo *) * g_storage_id_count;
+    g_storage_ids_by_ip_port = (FDFSStorageIdInfo **)malloc(alloc_bytes);
+    if (g_storage_ids_by_ip_port == NULL)
+    {
+        result = errno != 0 ? errno : ENOMEM;
+        logError("file: "__FILE__", line: %d, " \
+                "malloc %d bytes fail, " \
+                "errno: %d, error info: %s", __LINE__, \
+                alloc_bytes, result, STRERROR(result));
+        return result;
+    }
+
+    port_count = 0;
+    for (i=0; i<g_storage_id_count; i++)
+    {
+        g_storage_ids_by_ip_port[i] = g_storage_ids_by_ip + i;
+        if (g_storage_ids_by_ip_port[i]->port > 0)
+        {
+            port_count++;
+        }
+    }
+    if (port_count > 0 && port_count != g_storage_id_count)
+    {
+        logError("file: "__FILE__", line: %d, "
+                "config file: storage_ids.conf, some storages without port, "
+                "must be the same format as host:port", __LINE__);
+
+        free(g_storage_ids_by_ip_port);
+        g_storage_ids_by_ip_port = NULL;
+        return EINVAL;
+    }
+
+	qsort(g_storage_ids_by_ip_port, g_storage_id_count,
+		sizeof(FDFSStorageIdInfo *), fdfs_cmp_ip_and_port);
+
+    previous = g_storage_ids_by_ip_port[0];
+    for (i=1; i<g_storage_id_count; i++)
+    {
+        if (fdfs_cmp_ip_and_port(&g_storage_ids_by_ip_port[i],
+                    &previous) == 0)
+        {
+            char szPortPart[16];
+            if (previous->port > 0)
+            {
+                sprintf(szPortPart, ":%d", previous->port);
+            }
+            else
+            {
+                *szPortPart = '\0';
+            }
+            logError("file: "__FILE__", line: %d, "
+                    "config file: storage_ids.conf, "
+                    "duplicate storage: %s%s", __LINE__,
+                    previous->ip_addr, szPortPart);
+
+            free(g_storage_ids_by_ip_port);
+            g_storage_ids_by_ip_port = NULL;
+            return EEXIST;
+        }
+
+        previous = g_storage_ids_by_ip_port[i];
+    }
+
+    return 0;
+}
+
+FDFSStorageIdInfo *fdfs_get_storage_id_by_ip_port(const char *pIpAddr,
+        const int port)
+{
+	FDFSStorageIdInfo target;
+	FDFSStorageIdInfo *pTarget;
+	FDFSStorageIdInfo **ppFound;
+    int ports[2];
+    int i;
+
+    if (g_storage_ids_by_ip_port == NULL)
+    {
+        if (fdfs_init_ip_port_array() != 0)
+        {
+            return NULL;
+        }
+    }
+
+	pTarget = &target;
+	memset(&target, 0, sizeof(FDFSStorageIdInfo));
+	snprintf(target.ip_addr, sizeof(target.ip_addr), "%s", pIpAddr);
+    ports[0] = port;
+    ports[1] = 0;
+    for (i=0; i<2; i++)
+    {
+        target.port = ports[i];
+        ppFound = (FDFSStorageIdInfo **)bsearch(&pTarget,
+                g_storage_ids_by_ip_port, g_storage_id_count,
+                sizeof(FDFSStorageIdInfo *), fdfs_cmp_ip_and_port);
+        if (ppFound != NULL)
+        {
+            return *ppFound;
+        }
+    }
+
+    return NULL;
+}
+
 int fdfs_check_storage_id(const char *group_name, const char *id)
 {
 	FDFSStorageIdInfo *pFound;
@@ -354,7 +481,9 @@ int fdfs_load_storage_ids(char *content, const char *pStorageIdsFilename)
 	char *line;
 	char *id;
 	char *group_name;
+	char *pHost;
 	char *pIpAddr;
+	char *pPort;
 	FDFSStorageIdInfo *pStorageIdInfo;
 	FDFSStorageIdInfo **ppStorageIdInfo;
 	FDFSStorageIdInfo **ppStorageIdEnd;
@@ -455,14 +584,14 @@ int fdfs_load_storage_ids(char *content, const char *pStorageIdsFilename)
 				group_name++;
 			}
 		
-			pIpAddr = group_name;
-			while (!(*pIpAddr == ' ' || *pIpAddr == '\t' \
-				|| *pIpAddr == '\0'))
+			pHost = group_name;
+			while (!(*pHost == ' ' || *pHost == '\t' \
+				|| *pHost == '\0'))
 			{
-				pIpAddr++;
+				pHost++;
 			}
 
-			if (*pIpAddr == '\0')
+			if (*pHost == '\0')
 			{
 				logError("file: "__FILE__", line: %d, " \
 					"config file: %s, line no: %d, " \
@@ -473,19 +602,29 @@ int fdfs_load_storage_ids(char *content, const char *pStorageIdsFilename)
 				break;
 			}
 
-			*pIpAddr = '\0';
-			pIpAddr++;  //skip space char
-			while (*pIpAddr == ' ' || *pIpAddr == '\t')
+			*pHost = '\0';
+			pHost++;  //skip space char
+			while (*pHost == ' ' || *pHost == '\t')
 			{
-				pIpAddr++;
+				pHost++;
 			}
 
+            pIpAddr = pHost;
+            pPort = strchr(pHost, ':');
+            if (pPort != NULL)
+            {
+                *pPort = '\0';
+                pStorageIdInfo->port = atoi(pPort + 1);
+            }
+            else
+            {
+                pStorageIdInfo->port = 0;
+            }
 			if (getIpaddrByName(pIpAddr, pStorageIdInfo->ip_addr, \
 				sizeof(pStorageIdInfo->ip_addr)) == INADDR_NONE)
 			{
 				logError("file: "__FILE__", line: %d, " \
-					"invalid host name: %s", \
-					__LINE__, pIpAddr);
+					"invalid host name: %s", __LINE__, pIpAddr);
 				result = EINVAL;
 				break;
 			}
@@ -520,9 +659,18 @@ int fdfs_load_storage_ids(char *content, const char *pStorageIdsFilename)
 	pStorageIdInfo = g_storage_ids_by_ip;
 	for (i=0; i<g_storage_id_count; i++)
 	{
-		logDebug("%s  %s  %s", pStorageIdInfo->id, \
-			pStorageIdInfo->group_name, 
-			pStorageIdInfo->ip_addr);
+        char szPortPart[16];
+        if (pStorageIdInfo->port > 0)
+        {
+            sprintf(szPortPart, ":%d", pStorageIdInfo->port);
+        }
+        else
+        {
+            *szPortPart = '\0';
+        }
+		logDebug("%s  %s  %s%s", pStorageIdInfo->id,
+			pStorageIdInfo->group_name,
+			pStorageIdInfo->ip_addr, szPortPart);
 
 		pStorageIdInfo++;
 	}
@@ -539,6 +687,7 @@ int fdfs_load_storage_ids(char *content, const char *pStorageIdsFilename)
 		sizeof(FDFSStorageIdInfo), fdfs_cmp_group_name_and_ip);
 	qsort(g_storage_ids_by_id, g_storage_id_count, \
 		sizeof(FDFSStorageIdInfo *), fdfs_cmp_server_id);
+
 	return result;
 }
 
diff --git a/tracker/fdfs_shared_func.h b/tracker/fdfs_shared_func.h
index 172831f..d40c5f0 100644
--- a/tracker/fdfs_shared_func.h
+++ b/tracker/fdfs_shared_func.h
@@ -60,6 +60,9 @@ FDFSStorageIdInfo *fdfs_get_storage_by_id(const char *id);
 FDFSStorageIdInfo *fdfs_get_storage_id_by_ip(const char *group_name, \
 		const char *pIpAddr);
 
+FDFSStorageIdInfo *fdfs_get_storage_id_by_ip_port(const char *pIpAddr,
+        const int port);
+
 int fdfs_check_storage_id(const char *group_name, const char *id);
 
 int fdfs_get_storage_ids_from_tracker_server(ConnectionInfo *pTrackerServer);
diff --git a/tracker/tracker_service.c b/tracker/tracker_service.c
index d3c9bd1..f057033 100644
--- a/tracker/tracker_service.c
+++ b/tracker/tracker_service.c
@@ -1120,6 +1120,77 @@ static int tracker_deal_get_storage_id(struct fast_task_info *pTask)
 	return 0;
 }
 
+static int tracker_deal_get_storage_group_name(struct fast_task_info *pTask)
+{
+	char ip_addr[IP_ADDRESS_SIZE];
+	FDFSStorageIdInfo *pFDFSStorageIdInfo;
+    char *pPort;
+    int port;
+	int nPkgLen;
+
+	if (!g_use_storage_id)
+	{
+		logError("file: "__FILE__", line: %d, "
+                "use_storage_id is disabled, can't get group name "
+                "from storage ip and port!", __LINE__);
+		pTask->length = sizeof(TrackerHeader);
+		return EOPNOTSUPP;
+    }
+
+	nPkgLen = pTask->length - sizeof(TrackerHeader);
+	if (nPkgLen < 4)
+	{
+		logError("file: "__FILE__", line: %d, " \
+			"cmd=%d, client ip addr: %s, " \
+			"package size %d is not correct", __LINE__, \
+			TRACKER_PROTO_CMD_STORAGE_GET_GROUP_NAME, \
+			pTask->client_ip, nPkgLen);
+		pTask->length = sizeof(TrackerHeader);
+		return EINVAL;
+	}
+
+	if (nPkgLen == 4)  //port only
+	{
+		strcpy(ip_addr, pTask->client_ip);
+        pPort = pTask->data + sizeof(TrackerHeader);
+	}
+	else  //ip_addr and port
+	{
+		int ip_len;
+
+		ip_len = nPkgLen - 4;
+		if (ip_len >= IP_ADDRESS_SIZE)
+		{
+            logError("file: "__FILE__", line: %d, " \
+                    "ip address is too long, length: %d",
+                    __LINE__, ip_len);
+            pTask->length = sizeof(TrackerHeader);
+            return ENAMETOOLONG;
+		}
+
+		memcpy(ip_addr, pTask->data + sizeof(TrackerHeader), ip_len);
+		*(ip_addr + ip_len) = '\0';
+        pPort = pTask->data + sizeof(TrackerHeader) + ip_len;
+	}
+    port = buff2int(pPort);
+
+    pFDFSStorageIdInfo = fdfs_get_storage_id_by_ip_port(ip_addr, port);
+    if (pFDFSStorageIdInfo == NULL)
+    {
+        logError("file: "__FILE__", line: %d, "
+                "client ip: %s, can't get group name for storage %s:%d",
+                __LINE__, pTask->client_ip, ip_addr, port);
+        pTask->length = sizeof(TrackerHeader);
+        return ENOENT;
+    }
+
+	pTask->length = sizeof(TrackerHeader) + FDFS_GROUP_NAME_MAX_LEN;
+    memset(pTask->data + sizeof(TrackerHeader), 0, FDFS_GROUP_NAME_MAX_LEN);
+	strcpy(pTask->data + sizeof(TrackerHeader), pFDFSStorageIdInfo->group_name);
+
+	return 0;
+}
+
 static int tracker_deal_fetch_storage_ids(struct fast_task_info *pTask)
 {
 	FDFSStorageIdInfo *pIdsStart;
@@ -1172,13 +1243,22 @@ static int tracker_deal_fetch_storage_ids(struct fast_task_info *pTask)
 	pIdsEnd = g_storage_ids_by_ip + g_storage_id_count;
 	for (pIdInfo = pIdsStart; pIdInfo < pIdsEnd; pIdInfo++)
 	{
+        char szPortPart[16];
 		if ((int)(p - pTask->data) > pTask->size - 64)
 		{
 			break;
 		}
 
-		p += sprintf(p, "%s %s %s\n", pIdInfo->id, \
-			pIdInfo->group_name, pIdInfo->ip_addr);
+        if (pIdInfo->port > 0)
+        {
+            sprintf(szPortPart, ":%d", pIdInfo->port);
+        }
+        else
+        {
+            *szPortPart = '\0';
+        }
+		p += sprintf(p, "%s %s %s%s\n", pIdInfo->id,
+			pIdInfo->group_name, pIdInfo->ip_addr, szPortPart);
 	}
 
 	int2buff((int)(pIdInfo - pIdsStart), (char *)pCurrentCount);
@@ -3683,6 +3763,9 @@ int tracker_deal_task(struct fast_task_info *pTask)
 		case TRACKER_PROTO_CMD_STORAGE_GET_SERVER_ID:
 			result = tracker_deal_get_storage_id(pTask);
 			break;
+		case TRACKER_PROTO_CMD_STORAGE_GET_GROUP_NAME:
+			result = tracker_deal_get_storage_group_name(pTask);
+			break;
 		case TRACKER_PROTO_CMD_STORAGE_FETCH_STORAGE_IDS:
 			result = tracker_deal_fetch_storage_ids(pTask);
 			break;
diff --git a/tracker/tracker_types.h b/tracker/tracker_types.h
index 2989bde..edff92a 100644
--- a/tracker/tracker_types.h
+++ b/tracker/tracker_types.h
@@ -423,6 +423,7 @@ typedef struct
 	char id[FDFS_STORAGE_ID_MAX_SIZE];
 	char group_name[FDFS_GROUP_NAME_MAX_LEN + 8];  //for 8 bytes alignment
 	char ip_addr[IP_ADDRESS_SIZE];
+    int port;   //since v5.05
 } FDFSStorageIdInfo;
 
 typedef struct