vertx instance
在-cluster模式下
如果處理程式啟動多個例項,並且例項比同時請求多的話,每次處理使用的例項都會不同(會把請求均勻分配給多個例項)
$ java -jar hello-microservice-message-1.0-SNAPSHOT.jar -ha -instances 5
如果HTTP啟動多個例項,一個瀏覽器只會請求相同的例項,開啟另一個瀏覽器會請求另一個HTTP例項。
火狐
谷歌
因此我們只用在啟動引數上增加例項,不用寫在程式裡,這樣比較方便我們水平擴充。
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