--- memcache_session.c	2008-02-05 14:46:51.000000000 -0500
+++ ../memcache_session.c	2008-03-31 08:16:13.000000000 -0400
@@ -36,6 +36,8 @@
 	PS_MOD(memcache)
 };
 
+static int webid=0; // to distinguish between webservers which use same memcached server 
+
 /* {{{ PS_OPEN_FUNC
  */
 PS_OPEN_FUNC(memcache)
@@ -90,6 +92,12 @@
 					retry_interval = Z_LVAL_PP(param);
 				}
 
+				/* hack */
+				if (zend_hash_find(Z_ARRVAL_P(params), "web_id", sizeof("web_id"), (void **) &param) != FAILURE) {
+					convert_to_long_ex(param);
+					webid = Z_LVAL_PP(param);
+				}
+
 				zval_ptr_dtor(&params);
 			}
 
@@ -147,16 +155,21 @@
 
 	if (pool) {
 		char key_tmp[MMC_KEY_MAX_SIZE];
+		char key_tmp2[MMC_KEY_MAX_SIZE];
 		unsigned int key_tmp_len;
 
 		if (mmc_prepare_key_ex(key, strlen(key), key_tmp, &key_tmp_len TSRMLS_CC) != MMC_OK) {
 			return FAILURE;
 		}
 
+		/* hack : assume key length never reach beyond MMC_KEY_MAX_SIZE */
+		sprintf(key_tmp2,"%s%d",key_tmp,webid); 
+		key_tmp_len=strlen(key_tmp2);
+		
 		MAKE_STD_ZVAL(result);
 		ZVAL_NULL(result);
 
-		if (mmc_exec_retrieval_cmd(pool, key_tmp, key_tmp_len, &result, NULL TSRMLS_CC) <= 0 || Z_TYPE_P(result) != IS_STRING) {
+		if (mmc_exec_retrieval_cmd(pool, key_tmp2, key_tmp_len, &result, NULL TSRMLS_CC) <= 0 || Z_TYPE_P(result) != IS_STRING) {
 			zval_ptr_dtor(&result);
 			return FAILURE;
 		}
@@ -179,13 +192,18 @@
 
 	if (pool) { 
 		char key_tmp[MMC_KEY_MAX_SIZE];
+		char key_tmp2[MMC_KEY_MAX_SIZE];
 		unsigned int key_tmp_len;
 
 		if (mmc_prepare_key_ex(key, strlen(key), key_tmp, &key_tmp_len TSRMLS_CC) != MMC_OK) {
 			return FAILURE;
 		}			
 		
-		if (mmc_pool_store(pool, "set", sizeof("set")-1, key_tmp, key_tmp_len, 0, INI_INT("session.gc_maxlifetime"), val, vallen TSRMLS_CC)) {
+		/* hack : assume key length never reach beyond MMC_KEY_MAX_SIZE */
+		sprintf(key_tmp2,"%s%d",key_tmp,webid); 
+		key_tmp_len=strlen(key_tmp2);
+
+		if (mmc_pool_store(pool, "set", sizeof("set")-1, key_tmp2, key_tmp_len, 0, INI_INT("session.gc_maxlifetime"), val, vallen TSRMLS_CC)) {
 			return SUCCESS;
 		}
 	}
@@ -205,14 +223,19 @@
 
 	if (pool) {
 		char key_tmp[MMC_KEY_MAX_SIZE];
+		char key_tmp2[MMC_KEY_MAX_SIZE];
 		unsigned int key_tmp_len;
 
 		if (mmc_prepare_key_ex(key, strlen(key), key_tmp, &key_tmp_len TSRMLS_CC) != MMC_OK) {
 			return FAILURE;
 		}
 		
-		while (result < 0 && (mmc = mmc_pool_find(pool, key_tmp, key_tmp_len TSRMLS_CC)) != NULL) {
-			if ((result = mmc_delete(mmc, key_tmp, key_tmp_len, 0 TSRMLS_CC)) < 0) {
+		/* hack : assume key length never reach beyond MMC_KEY_MAX_SIZE */
+		sprintf(key_tmp2,"%s%d",key_tmp,webid); 
+		key_tmp_len=strlen(key_tmp2);
+		
+		while (result < 0 && (mmc = mmc_pool_find(pool, key_tmp2, key_tmp_len TSRMLS_CC)) != NULL) {
+			if ((result = mmc_delete(mmc, key_tmp2, key_tmp_len, 0 TSRMLS_CC)) < 0) {
 				mmc_server_failure(mmc TSRMLS_CC);
 			}
 		}