延伸的叢集總覽Stretched clusters overview

• 12/21/2020
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適用于 Azure Stack HCI，版本 v20H2Applies to Azure Stack HCI, version v20H2

嚴重損壞修復的 Azure Stack HCI 延展叢集解決方案可提供自動容錯移轉，以快速還原生產環境，而不需要手動介入。An Azure Stack HCI stretched cluster solution for disaster recovery provides automatic failover to restore production quickly, and without the need for manual intervention. 儲存體複本會跨網站複寫磁片區以進行嚴重損壞修復，並讓所有伺服器保持同步。Storage Replica provides the replication of volumes across sites for disaster recovery, with all servers staying in sync.

儲存體複本同時支援同步和非同步複寫：Storage Replica supports both synchronous and asynchronous replication:

• 同步複寫會在具有損毀一致磁片區的低延遲網路中跨網站鏡像資料，以確保在失敗期間不會遺失檔案系統層級的資料。Synchronous replication mirrors data across sites in a low-latency network with crash-consistent volumes to ensure zero data loss at the file-system level during a failure.
• 非同步複寫會透過延遲較高的網路連結來鏡像跨非都會範圍之網站的資料，但不保證兩個網站在失敗時具有相同的資料複本。Asynchronous replication mirrors data across sites beyond metropolitan ranges over network links with higher latencies, but without a guarantee that both sites have identical copies of the data at the time of a failure.

有兩種類型的延伸叢集：主動-被動和主動-主動。There are two types of stretched clusters, active-passive and active-active. 您可以設定主動-被動網站複寫，其中有偏好的網站和複寫方向。You can set up active-passive site replication, where there is a preferred site and direction for replication. 主動-主動複寫是從任一網站雙向進行複寫的位置。Active-active replication is where replication can happen bi-directionally from either site. 本文只涵蓋主動式/被動設定。This article covers the active/passive configuration only.

簡單來說 ，使用中的網站 是具有資源的網站，並提供角色和工作負載供用戶端連接。In simple terms, an active site is one that has resources and is providing roles and workloads for clients to connect to. 被動 網站不提供任何角色或工作負載給用戶端，並且正在等候來自作用中網站的容錯移轉，以進行嚴重損壞修復。A passive site is one that does not provide any roles or workloads for clients and is waiting for a failover from the active site for disaster recovery.

網站可以處於兩種不同的州、不同的城市、不同的樓層或不同的房間。Sites can be in two different states, different cities, different floors, or different rooms. 使用兩個網站的延展叢集可在網站發生中斷或失敗時，提供嚴重損壞修復和業務持續性。Stretched clusters using two sites provides disaster recovery and business continuity should a site suffer an outage or failure.

請花幾分鐘的時間，使用 Azure Stack HCI 觀看延伸叢集的影片：Take a few minutes to watch the video on stretched clustering with Azure Stack HCI:

主動-被動延伸叢集Active-passive stretched cluster

下圖顯示網站1做為作用中網站，且複寫至網站2的單向複寫。The following diagram shows Site 1 as the active site with replication to Site 2, a unidirectional replication.

主動-主動延伸叢集Active-active stretched cluster

下圖顯示網站1和網站2作為作用中網站，並以雙向方式複寫至另一個網站。The following diagram shows both Site 1 and Site 2 as being active sites, with bidirectional replication to the other site.

後續步驟Next steps

• 深入瞭解儲存體複本。Learn more about Storage Replica. 請參閱 儲存體複本總覽。See Storage Replica overview.
• 深入瞭解如何使用儲存體複本。Learn even more about using Storage Replica. 請參閱 設定 Hyper-v 容錯移轉叢集或一般使用叢集的檔案伺服器。See Configure a Hyper-V Failover Cluster or a File Server for a General Use Cluster.
• 瞭解延伸叢集的硬體和其他需求。Learn about hardware and other requirements for stretched clusters. 請參閱 系統需求。See System requirements.
• 瞭解如何使用 Windows Admin Center 部署延伸的叢集。Learn how to deploy a stretched cluster using Windows Admin Center. 請參閱 使用 Windows Admin Center 建立叢集。See Create a cluster using Windows Admin Center.
• 瞭解如何使用 PowerShell 部署延伸的叢集。Learn how to deploy a stretched cluster using PowerShell. 請參閱 使用 PowerShell 建立叢集。See Create a cluster using PowerShell.
• 瞭解如何建立磁片區，以及設定延伸叢集的複寫。Learn how to create volumes and set up replication for stretched clusters. 請參閱 建立磁片區並設定延伸叢集的複寫。See Create volumes and set up replication for stretched clusters.