duhenglucky commented on issue #1348: why nameserver cannot have funcation of switch role of broker? URL: https://github.com/apache/rocketmq/issues/1348#issuecomment-517264055 @eagle2016 good question, up to now, the name server is an AP solution for service discovery, it brings a lot of conveniences, but it will also cause consistency problems（Of course, this doesn't seem to be a problem in this scenario）, so we can't use this to solve the switching problem temporarily. But as you described deleger mode will bring a large performance loss, do you have relevant data to prove this problem? we can optimize this problem together, dledger is a very good high availability and consistent solution in messaging middleware.
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