Absolutely, I considered the server constitution not using a load balancer. But now I’m using PHP and C as aerospike client, and there are only programming samples specifying one node https://www.aerospike.com/docs/client/php https://www.aerospike.com/docs/client/c/usage/connect/index.html In these programmings, I think that PHP or C aerospike client cannot communicate with the aerospike cluster if the specified node was down. Is this recognition wrong? And could you tell me the way to avoid the problem not to connect the aerospike cluster in PHP or C, if the specified node was down.