hive gateway功能介紹

官網介紹：

Because the Hive service does not have worker roles, another mechanism is needed to enable the automatic propagation of client configurations to the other hosts in your cluster. Gateway roles fulfill this function. Gateways in fact aren't really roles and do not have state, but they act as indicators for where client configurations should be placed. Hive gateways are created by default when the Hive service is added.

翻譯：

因爲Hive服務不具備輔助角色，所以須要其餘機制來啓用客戶端配置自動傳播到羣集中的其餘主機。 gateway角色執行此功能。 gateway事實上並非真正的角色，也沒有狀態，但它們充當了告訴客戶端配置應該放置在哪裏。 添加Hive服務時，默認狀況下會建立Hive網關。

相關鏈接：

 http://www.cloudera.com/documentation/manager/5-0-x/Cloudera-Manager-Managing-Clusters/cm5mc_hive_service.html#xd_583c10bfdbd326ba-204beb9-13ef1573a9e--7ff6__section_gmq_nq5_hl