集群模式主要解决水平拓展问题和整体的高可用（局部节点故障不影响其他节点的数据）。如果要保证所有数据的高可用还需要配合主从模式How are you going to choose among the iconic marketplaces in Cologne and Nuremburg? Two locals struggle it out for the crown.Later, even though upstarts like Munich
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When the ancient Greeks adopted the alphabet, they'd no use for any letter to symbolize the glottal cease—the consonant audio that the letter denoted in Phoenician and also other Semitic languages, and that was the very first phoneme from the Phoenician pronunciation of the letter—so they made use of their Variation on the signal to signify the