as per Brooke suggests,RACs a multipile of RF. https://www.youtube.com/watch?v=QrP7G1eeQTI
if we have 6 machines with RF=3,then we can set up 6 RACs or setup 3RACs,which will be better? Could you please further advise? Many thanks ------------------ 原始邮件 ------------------ 发件人: "我自己的邮箱";<2535...@qq.com>; 发送时间: 2017年7月26日(星期三) 晚上7:31 收件人: "user"<user@cassandra.apache.org>; 抄送: "anujw_2...@yahoo.co.in"<anujw_2...@yahoo.co.in>; 主题: 回复： 回复： tolerate how many nodes down in the cluster One more question.why the # of racks should be equal to RF? For example,we have 4 machines,each virtualized to 8 vms ,can we set 4 RACs with RF3?I mean one machine one RAC. Thanks ------------------ 原始邮件 ------------------ 发件人: "我自己的邮箱";<2535...@qq.com>; 发送时间: 2017年7月26日(星期三) 上午10:32 收件人: "user"<user@cassandra.apache.org>; 抄送: "anujw_2...@yahoo.co.in"<anujw_2...@yahoo.co.in>; 主题: 回复： 回复： tolerate how many nodes down in the cluster Thanks for the remind,we will setup a new DC as suggested. ------------------ 原始邮件 ------------------ 发件人: "kurt greaves";<k...@instaclustr.com>; 发送时间: 2017年7月26日(星期三) 上午10:30 收件人: "User"<user@cassandra.apache.org>; 抄送: "anujw_2...@yahoo.co.in"<anujw_2...@yahoo.co.in>; 主题: Re: 回复： tolerate how many nodes down in the cluster Keep in mind that you shouldn't just enable multiple racks on an existing cluster (this will lead to massive inconsistencies). The best method is to migrate to a new DC as Brooke mentioned.
