You can replicate an index to a secondary server in an HDR pair that contains a corrupted index.

可以将索引复制到包含冲突索引的 HDR 对（HDR pair）中的辅助服务器。

youdao

The XISCAN probes the index with the path-value pair (/book/price, 29) and returns the row IDs for documents where the price is 29.

XISCAN 使用路径值对（/book/price, 29） 来检查索引，并返回其中价格为 29 的文档的行 ID。

youdao

Select the number of instances you want to create, the name (an index is added for each instance), the size, the key pair, etc.

选择想要创建的实例数、名称（为每个实例添加一个索引）、大小、密钥对等。

youdao

Once you know the average return, the standard deviation of each index and the correlation coefficient between each pair of indexes, the rest is math.

FORBES: Asset Allocation and the Efficient Frontier