它查找对文档分区的改变并激活进一步分割文本的规则。
It checks for changes to the document partitions and activates rules to further divide the text.
因此，在分割镜像期间，每个分区上的 I/O 写都必须挂起。
Therefore, I/O writes must be suspended on each partition during the split mirror process.
分区策略必须借助功能分割或水平分区来支持底层数据库的水平扩展。
Partitioning strategies must support scaling out of the underlying databases, usually by functional segmentation or horizontal partitioning.
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