Cicizz commented on issue #614: How much memory should we use for broker and namesrv when using cluster mode? URL: https://github.com/apache/rocketmq/issues/614#issuecomment-448493281 namesrv manage broker info and topic info and store all info in the memory,so i think 16g mem is more suitable,but if your topic and queue are relatively few,8g is OK。for 3 broker, i think 2 namesrv is OK. and only master may lost messages. so 2M - 2S is adviced。 There are some configuration we are using now 2 namesrv: 8cpu and 16g 4 cluster,per cluster have 2 master and 2slave. broker : 2M-2S. 3E messages a day.
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