indexes can
索引可以
指数可
索引能够
该指数可以 index could
索引可以
指数可
索引能够
该指数可以
Indexes can now cover any stage an aggregation pipeline.Indexes can be created or dropped with no effect on the data.To summarize, each index can be split into multiple shards. The index could be searched by using the grep Unix command. For example, we write, the index could include:.
索引可以 覆盖多个数据列,如像INDEX(columnA,columnB)索引。Indexes can cover multiple data columns, such as INDEX(columnA, columnB) indexes, which are joint indexes. . 索引可以 覆盖多个数据列,如像INDEX(columnA,columnB)索引,这就是联合索引。Indexes can cover multiple data columns, such as INDEX(columnA, columnB) indexes, which are joint indexes. . Shards&Replicas(分片和复制),索引可以 潜在地存储可以超过单个节点的硬件限制的大量数据。 Shards and Replicas: An index can potentially store a large amount of data exceeding hardware limits. 其次,估计数据集的分布是一个众所周知的问题,学习索引可以 从之前数十年的研究中受益。 Estimating the distribution for a data set is a well-known problem and learned indexes can benefit from decades of research. 索引可以 在大约8次磁盘读取中完成查找,目标记录会在9次磁盘读取后获得。The index could be searched in about 8 disk reads, and the desired record could be accessed in 9 disk reads. 索引可以 存储在磁盘上,或者立即使用,同时索引 中的搜索、添加/删除可以 交叉输入。The index can be stored on disk or used immediately, and searches and additions/removals to the index can be interleaved. 索引中的每一条记录只能指向引用对象仓库中的一条记录,但多个索引可以 引用同一个对象仓库。 Each record in an index can point to only one record in its referenced object store, but several indexes can reference the same object store. The index can stay the same, and the record can just be marked as deleted. 注意,基于数据行,MyISAM表索引可以 一直被重新构建。 Note that MyISAM table indexes can always be reconstructed based on the data rows. 您可以指定更少或更多的主分片来扩展索引可以 处理的文档数。 You can specify fewer or more primary shards to scale the number of documents that your index can handle. Elasticsearch是分布式的,这意味着索引可以 被分成分片,每个分片可以有0个或多个副本。 Elastic is distributed, which means that indices can be divided into shards and each shard can have zero or more replicas. 索引可以 用整型数组完成,其中相同的索引重复了几次:.Indexing can be done with an array of integers, where the same index is repeated several time:. 在一本书中,利用索引可以 快速查找所需信息,而无需阅读整本书。 In a book, an index allows you to find information quickly without reading the entire book. New values can be assigned with this kind of indexing :. An index can cover one or more columns.He realized that the Science Citation Index phenomenon could be applied to the Internet. A node's index can change from moment to moment. There are four types of elements that can be added a page:. A secondary index can easily be constructed from a key-value index. .索引可以 被显式地定义,也可以在索引文档时自动生成。A mapping can either be defined explicitly, or it will be generated automatically when a document is indexed. 一个索引可以 有多个类型,这些类型的文档可以存储在相同的索引中。 An index may have several types, and documents of any of these types may be stored in the same index. . 索引可以 令数据库服务器以比没有索引快得多的速度查找和检索特定的行。An index allows the database server to find and retrieve specific rows much faster than it could do without an index. . 索引可以 令数据库服务器以比没有索引快得多的速度查找和检索特定的行。Index allows the database server to find and retrieve specific rows much faster than it can be without an index. .
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