Step 3: DC1 notifies DC2 that it has changes available.
步骤3：dc1通知DC 2自己有可用更改。
DC2 then initiates replication with DC1 to request any updates that are available.
随后DC 2启动对DC1的复制来请求任何可用的更新。
Since there are only two DCs in the contoso.com domain, DC1 and DC2 replicate with each other only.
因为 contoso.com域中只有两个DC，所以DC1和DC2只能彼此复制。
Likewise, DC2 will notify DC1 when DC2 has any changes, after which DC1 will pull those changes from DC2.
同样，当DC2有任何更改时，它也会通知dc1，然后DC 1从dc2中拉出这些更改。
Step 2: An administrator creates a new object on DC1, and DC1's USN is incremented to 3001, as shown in Figure 2 .
步骤2：管理员在DC1 上创建了一个新对象，DC1的 USN增加到了 3001，如图 2 所示。
Notice that the HWMV of DC1 hasn't changed on DC2, because DC1 hasn't yet notified DC2 that it has changes waiting.
请注意DC 1针对DC2的HWMV没有更改，因为DC1尚未通知DC 2自己有正等待中的更改。
As a part of this request, DC2 sends DC1 the high watermark vector that it has stored for DC1, as shown in Figure 3.
作为此请求的一部分，DC2将向DC1发送其针对DC1存储的高水准矢量，如图3所示。
Step 4: DC1 sends DC2 the change that corresponds with USN 3001, that is, the object that was created on DC1 in Step 2.
步骤4：dc1向DC2发送与usn 3001相对应的更改，即在步骤2中在DC1上创建的对象。
For instance, if you connect to DC1 and change a user's password, that change is considered an originating write on DC1.
例如，如果您连接到DC 1并更改用户的密码，此更改便被视为DC1上的原始写入。
DC1's UTDV table (shown in Figure 6), indicating the highest originating USN that it has received from all DCs including DC3.
DC1的UT dv表(如图6所示)，指示已从所有DC(包括DC3)接收的最高原始usn。
In the case of intrasite replication, DC1 will notify DC2 that it has changes that need to be replicated, after which DC2 will pull those changes from DC1.
在站点内复制的情况下，DC1将通知dc2有需要复制的更改，然后DC 2从dc1中拉出这些更改。
Let's further say that DC1's current USN is 3000, DC2's current USN is 4500, and that these two DCs are fully up-to-date with one another as we begin our example.
我们再假设DC1的当前usn为3000,dc2的当前usn为4500，在开始我们的示例时两个DC对彼此而言都已处于最新状态。
Let's further say that DC1's current USN is 3000, DC2's current USN is 4500, and that these two DCs are fully up-to-date with one another as we begin our example.
我们再假设DC1的当前usn为3000,dc2的当前usn为4500，在开始我们的示例时两个DC对彼此而言都已处于最新状态。
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