shard

1. This time, suppose you define one replica shard.: 这一次，假设您定义一个复制碎片。

2. The Shard London Bridge tower in London. (Jason Hawkes): 伦敦桥，伦敦。

3. All records in an atomic unit are stored in the same shard.: 原子单元中的所有记录都会存储在相同的分片上。

4. Now we define the shard strategies to be used in the application.: 现在我们定义应用程序中要使用的分片策略。

5. After this migration, each shard held approximately 33 GB of data.: 经过这次迁移之后，每个Shard大概有33g的数据。

6. We'll call this pool a processing unit, with one pool hosted in each shard.: 我们将这个线程池称为一个处理单元，每个shard中托管一个线程池。

7. Before you shard, make sure your application's size and growth merit it.: 在进行切分之前，一定要确定应用程序的规模和增长对其有利。

8. The difference between a partition and a shard might be confusing at first: 分区和碎片之间的不同一开始可能很容易混淆

9. A smaller race, like a 5k (which is 3.1 miles), should be found in Shard 0.: 一个小型的比赛，如5公里的比赛(3.1英里)，将在切分0中找到。

10. Next, we build the Shard Strategy Factory based on shard strategy implementations.: 接下来，我们基于碎片策略实现构建碎片策略工厂。

11. Listing 6 shows the configuration for Shard 0, and Shard 1 is almost identical.: 清单6显示了切分0和切分1的配置几乎相同。

12. He grabs the shard and slowly pulls it out, trying his best not to cry out in pain.: 他捏住碎片慢慢拔了出来，虽然疼痛，但他尽力没有叫出声来。

13. A shard is a real, physical chunk of memory that stores the contents of a partition.: 碎片是一个实际的物理内存块，它存储分区的内容。

14. However, this didn't relieve the performance problem on the full shard. As Horowitz notes.: 但是，这种方式并没有缓解整个Shard的性能问题。

15. A worker who is assigned a map task reads the contents of the corresponding input shard.: 被分配到map任务的worker读取对应的数据块。

16. Likewise the proposed Motor Pool Improvement, on account of a shard of Colonial crockery.: 类似的还有摩托车中心的改造项目，因为从地里挖出了殖民时代的陶器碎片也没搞成。

17. In some cases, they can also be used to satisfy read requests to offload the primary shard.: 在某些情况下，它们可以用来满足读取请求卸载主碎片。

18. The shard ID will be mapped with respect to the virtual shard ID map configured in the later steps.: 碎片ID将相对于后续步骤中配置的虚拟碎片ID映射予以映射。

19. Getting back to the familiar example of my racing application, I can shard by race or by runner.: 现在让我们回到我经常提到的赛跑应用程序示例中，我可以根据比赛或参赛者进行切分。

20. Namely, it needs a shard-access strategy, a shard-selection strategy, and a shard-resolution strategy.: 比如，需要一个切分访问策略、一个切分选择策略和一个切分处理策略。

21. In case a virtual shard id map is not provided (it is optional), it is defaulted to the physical shard id map.: 如果未提供虚拟碎片ID映射(可选)，默认为物理碎片id映射。

22. This application also USES he virtual shard option to take care of future database scalability requirements.: 该应用程序还使用虚拟碎片选项处理将来的数据库可伸缩性需求。

23. Your shard strategy should, however, incorporate some means of distributing data evenly among all of your shards.: 但是，您的切分策略应该包含将数据均匀分布至所有切分的方法。

24. In this case, I'm going to shard by race, because I see the domain being organized by runners who belong to RACES.: 在本示例中，我将根据比赛进行切分，因为我看到域是根据参加不同比赛的参赛者进行组织的。

25. If you try to store that data in Shard 2, things will get complicated, and system performance will probably suffer.: 如果您尝试将那些数据存储在切分2中，情况就会变得复杂，系统性能也可能受影响。

26. Database sharding refers to the horizontal partitioning of a database with each inpidual partition called a shard.: 数据库分片是指对数据库进行水平分区，其中每个分区称为一个碎片。

27. As we scale the number of database instances, hibernate.cfg.xml is added for each database instance used in the shard.: 随着数据库实例的增多，为碎片中使用的每个数据库实例添加hibernate . cfg . xml。

28. The term "shard" is commonly used to describe inpidual servers that are designed around a traditional application pattern.: “片(shard)”这个词通常用来描述围绕一种传统应用程序模式设计的各个服务器。

29. For customers, you could shard based on location (Europe, Asia, Africa, etc.), or you could shard based on something else.: 对于客户来说，您可以根据所在地(欧洲、亚洲、非洲等)切分，或者您也可以根据其他元素进行切分。

30. In Listing 10, I've created a marathon and then proceeded to verify that the record is indeed in Shard 1 and not in Shard 0.: 在清单10中，我已经创建了一场马拉松，然后继续验证记录确实是在切分1中而非切分0中。

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