golang - go連接mongo replica set時，如何讓read均勻分佈到各個secondary上去？

Question

replicaset有兩個secondary，Eventual mode，但在使用labix/mgo.v2連接mongo時，發現所有的read都只集中在一個secondary上了，僅有很少的量會訪問另外一個secondary 。

// Read preference modes are specific to mgo:
Eventual  Mode = 0 // Same as Nearest, but may change servers between reads.
Monotonic Mode = 1 // Same as SecondaryPreferred before first write. Same as Primary after first write.
Strong    Mode = 2 // Same as Primary.

Answer 1

1、檢查一下connect URL的設定；

2、如果讀取的Load Balance和你設定的參數的預期不一樣，可以考慮配合設定Tag，進一步配置從什麼member讀。

供參考。

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