tailieunhanh - Hướng dẫn học Microsoft SQL Server 2008 part 120

Cài đặt điều kiện tiên quyết cho SQL Server 2008 như đã nói trên cả hai Node 1 và NODE2. Để giảm thiểu thời gian chết, cài đặt các điều kiện tiên quyết trên nút thụ động (Node 1) đầu tiên và khởi động lại Node 1. Sau đó, trong một thời gian dừng theo lịch trình, chuyển đổi dự phòng SQL Server 2005 chẳng hạn (SQL2005INST1) từ NODE2 đến Node 1. Điều này phải gánh chịu một thời gian chết ngắn gọn khoảng 15 giây. Sau khi failover, cài đặt các điều kiện tiên quyết về NODE2 NODE2 và. | Part VI Enterprise Data Management 1. Install prerequisites for SQL Server 2008 as discussed earlier on both NODE1 and NODE2. To minimize downtime install the prerequisites on the passive node NODE1 first and reboot NODE1. Then during a scheduled downtime failover the SQL Server 2005 instance SQL2005INST1 from NODE2 to NODE1. This incurs a brief downtime of approximately 15 seconds. After the failover install the prerequisites on NODE2 and reboot NODE2. Now NODE2 is the passive node and NODE1 is the active node. r - - I do not want to paint a rosy picture suggesting that all failovers will take 15 seconds. The actual downtime will depend on your environment. For example I saw one failover take 10 minutes as the SQL Server 2005 instance was dependent on 20 drives and it took all the drives approximately 10 minutes to come online and SQL Server can be online only after the drives it is dependent on come online. Also if there is a long-running transaction running when the failover occurs SQL Server goes through recovery after failover and will roll back the uncompleted long-running transaction which again can increase your downtime. This is another reason why you need to have an identical test environment in which to test and observe the actual downtime or at least provide a good estimate of the downtime. 2. During this step upgrade the passive node NODE2 . When NODE2 is being upgraded setup automatically takes NODE2 out of the possible owners for the SQL Network Name resource and then upgrades the binaries on NODE2. Here are the detailed steps On NODE2 launch the SQL Server Installation Center by double-clicking on the root of the SQL Server 2008 installation media. On the left-hand side of the SQL Server Installation Center click Installation. Click Upgrade from SQL Server 2000 or SQL Server 2005 to start the upgrade. On the Setup Support Rules page verify that there are no errors and click OK. On the Setup Support Files page click Install. Setup runs .