为密集IO操作优化cassandra java/scala驱动程序的配置?

您需要按照中所述进行调整 driver's documentation for protocol V2 it has 至少2个连接,最多2个连接。您可以使用以下代码将其最小值增加到4,最大值增加到10:

PoolingOptions poolingOptions = new PoolingOptions();
poolingOptions
    .setConnectionsPerHost(HostDistance.LOCAL,  4, 10)
    .setConnectionsPerHost(HostDistance.REMOTE, 2, 4);

创建群集/会话对象时,应添加以下选项:

Cluster cluster = Cluster.builder()
    .withContactPoints("127.0.0.1")
    .withPoolingOptions(poolingOptions)
    .build();