MGR最多有幾個服務器組成

What is the maximum number of MySQL servers in a group?
A group can consist of maximum 9 servers. Attempting to add another server to a group with 9 members causes the request to join to be refused. This limit has been identified from testing and benchmarking as a safe boundary where the group performs reliably on a stable local area network.

一個組中包括最多9臺服務器。嘗試添加一個服務器到這個有9臺服務器的組中會致使請求被拒絕。這個限制在測試和基準測試中被證實，做爲一個安全邊界。在這個邊界內，在一個穩定的本地網絡上，組複製能夠可靠的運行。