主从模式是最基础的模式，配置简单，主要用于数据备份和读写分离，提高系统的读取性能。但是，主从模式无法处理主节点故障的情况。

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所有的写操作都在主节点上进行，如果写请求量大，主节点可能会成为性能瓶颈。

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With its central site in The most crucial European financial spot, substantial inhabitants density, strong urbanization and numerous organization destinations, North Rhine-Westphalia has one of several densest transportation networks on the earth. Regional rail network[edit]

As of 2023, its financial system is the biggest among the German states by GDP but is underneath the countrywide common in GDP for each capita.

求生电影一般上会编写一些让人厌恶所以死不足惜的角色，像是必须牺牲几条性命，才能营造紧张恐怖的逃命气氛。本片不一样，故事集中在五个好姐妹身上，我边看边为她们打气，真心不希望有谁会出事。

Added expressways serve here as bypasses and local routes, Primarily around Dortmund and Bochum. As a result of density in the check here autobahns and expressways, Bundesstraßen are less significant for intercity traffic. The very first Autobahns from the Area opened during the mid-1930s.

主服务器发送数据快照：数据快照完成后，主服务器会将其发送给从服务器。从服务器在接收到数据快照后，会删除所有旧数据，然后使用接收到的数据快照来加载新数据。

Certainly one of Germany's finest artwork museums, the Wallraf-Richartz presents a primo collection of European artwork through the thirteenth towards the nineteenth generations in a very minimalist…

維基百科不是新聞的收集处。請留心記載正確資訊，在情報相對明朗之後進行編輯更新。編輯時請依可供查證方針，盡可能附上來源。

In spite of its dismembered affliction along with the sufferings it underwent with the palms of its French neighbours in many durations of warfare, the Rhenish territory prospered greatly click here and stood inside the foremost rank of German tradition and development.

哨兵模式的工作原�?在哨兵模式下，哨兵节点会定期检查主节点和从节点的运行状态。如果发现主节点发生故障，哨兵节点会在从节点中选举出一个新的主节点，并通知其他的从节点和哨兵节点。此外，哨兵节点还可以接收客户端的查询请求，返回当前的主节点信息，从而实现客户端的透明切换。

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