判斷成本Determining the Cost

適用於:Windows Server 2016、Windows Server 2012 R2、Windows Server 2012Applies To: Windows Server 2016, Windows Server 2012 R2, Windows Server 2012

您偏好便宜連接經由網站連結來指派成本值。You assign cost values to site links to favor inexpensive connections over expensive connections. 某些應用程式和服務,例如網域控制站定位器 (DCLocator) 和散發檔案系統命名空間 (DFSN),也使用付費的資訊以尋找最近的資源。Certain applications and services, such as Domain Controller Locator (DCLocator) and Distributed File System Namespaces (DFSN), also use cost information to locate the nearest resources. 網站連結成本可用來判斷如果指定網域控制站不存在,該網站的網域控制站連絡用中某個網站。Site link cost can be used to determine which domain controller is contacted by clients in one site if the domain controller for the specified domain does not exist at that site. Client 連絡人的網域控制站使用它成本最低的網站連結。The client contacts the domain controller by using the site link that has the lowest cost assigned to it.

我們建議的網站全各定義成本值。We recommend that the cost value be defined on a site-wide basis. 而不只是上的連結總共上可用性、延遲和成本連結,通常根據成本。Cost is usually based not only on the total bandwidth of the link but also on the availability, latency, and monetary cost of the link.

若要判斷成本放到網站連結、文件連接速度每個網站連結。To determine the costs to place on site links, document the connection speed for each site link. 在「地理位置和通訊連結「(DSSTOPO_1.doc) 試算表參考收集網路資訊有關連接您找出的速度。Refer to the "Geographic Locations and Communication Links" (DSSTOPO_1.doc) worksheet in Collecting Network Information for information about the connection speed that you identified.

下表列出的不同類型的網路速度。The following table lists the speeds for different types of networks.

網路類型Network type 速度Speed
非常慢Very slow 56 以每秒 56 kbps56 kilobits per second (Kbps)
變慢Slow 64 kbps64 Kbps
數位網路 (ISDN) 整合的服務Integrated Services Digital Network (ISDN) 64 kbps 或 128 Kbps64 Kbps or 128 Kbps
框架轉接Frame relay 變數速率,通常之間 56 Kbps 秒 Mbps 1.5 mbVariable rate, commonly between 56 Kbps and 1.5 megabits per second (Mbps)
T1T1 1.5 倍行高 Mbps1.5 Mbps
T3T3 45 Mbps45 Mbps
10BaseT10BaseT 10 Mbps10 Mbps
非同步傳輸模式 (ATM)Asynchronous transfer mode (ATM) 常之間 155 Mbps 622 Mbps 變數率Variable rate, commonly between 155 Mbps and 622 Mbps
100BaseT100BaseT 100 Mbps100 Mbps
Gigabit 乙太網路Gigabit Ethernet 1 gb (Gbps) 秒1 gigabit per second (Gbps)

使用下表計算每個網站連結的費用 (WAN) 連結速度根據寬區域網路速度。Use the following table to calculate the cost of each site link based on wide area network speed (WAN) link speed. 在表格中未列出的速度 WAN 連結,您可以來登入的頻寬,以在 Kbps 測量分割 1024 計算相對成本倍。For WAN link speed that is not listed in the table, you can calculate a relative cost factor by dividing 1,024 by the log of the available bandwidth, as measured in Kbps.

可用的頻寬 56 kbpsAvailable bandwidth (Kbps) 成本Cost
9.69.6 1,0421,042
19.219.2 798798
38.438.4 644644
5656 586586
6464 567567
128128 486486
256256 425425
512512 378378
1,0241,024 340340
2,0482,048 309309
4,0964,096 283283

這些成本不會反映不同的網路連結中的可靠性。These costs do not reflect differences in reliability between network links. 設定較高的成本任何網路易於失敗的連結,讓您不需要依賴複寫這些連結。Set higher costs on any failure-prone network links so that you do not have to rely on those links for replication. 較高的網站連結成本設定,您可以控制複寫錯誤移轉的網站連結失敗時。By setting higher site link costs, you can control replication failover when a site link fails.