每秒写入5个实体组 [英] The 5 writes per second for an entity group

问题描述

假设我们有5个实体：A，B，C，D，E，它们具有以下祖先层次：

  A 
 / \ 
 BC 
 / \ 
 DE 
  

我有两个问题：

1. 我们在这里有两个实体组（A，B，D）和（A，C ，E）还是1个实体
   组（A，B，C，D，E）？


2. 如果我们想更新实体D和E，我们可以
   每秒更新5次，或者如果D，E的合并写入
   不超过5？

解决方案

因此它是包含A，B，C，D和E的唯一实体组的一个根实体。实体组仅仅是一个由父子关系链接的实体的不同树。

至于写入限制，它适用于整个实体组。因此，每个实体（A，B，C，D或E）每秒不能超过5次更新，因为它们都属于同一个组。

您可以在数据存储争用（更新实体的频率）的更多信息。 rel =nofollow noreferrer>本文。

Suppose we have 5 entities: A,B,C,D,E with the following ancestor hierarchy:

      A
     / \
    B   C
   /     \
  D       E

I have two questions about this:

1. Do we have 2 entity groups here (A,B,D) and (A,C,E) or just 1 entity group (A,B,C,D,E)?
2. If we want to update entities D and E, can we update each of them 5 times per second or should the combined writes for D,E not exceed 5?

解决方案

There is only one entity without a parent here - that is, A. It is therefore a root entity of the sole entity group that contains A, B, C, D and E. Entity group is simply a distinct tree of entities linked by parent-child relationship.

As for write limit, it applies to whole entity group. Hence you cannot have more than five updates per second to either of your entities (A, B, C, D or E) since they all belong to the same group.

You can find more info on avoid the so-called datastore contention (updating entities too often) in this article.

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