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Client/Server Databases: Enterprise Computing by James Martin

By James Martin

Describing the know-how that makes it attainable to layout mission-critical database purposes utilizing low-cost and software program database expertise, this ebook presents the elemental wisdom and layout abilities had to successfully hire database software program to resolve company difficulties. It additionally examines allotted client/server environments and the appliance configurations that may be orientated in a multisystem setting. Introduces the functions of dependent question Language (SQL), and covers the typical pitfalls that new clients would possibly not another way become aware of from studying software program documentation.

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Extra resources for Client/Server Databases: Enterprise Computing

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Aspx for SQL Server Cluster best practices. Installing a Single-instance Failover Cluster In the earlier section of this chapter, we learned about the prerequisites for installing a failover cluster. Now that we are aware of them, let's get started by installing Single instance, that is, an Active/Passive cluster. [ 38 ] Chapter 2 Let me explain the most important aspect here. The term Active/Passive is used here because this configuration is a two-node and Single-instance Failover Cluster. We should actually practice calling it a Single-instance Failover Cluster instead of calling it an Active/Passive failover.

Before we start, let's understand the commonly used shared resources for the cluster server. Clusters with 2, 4, 8, 12 or 32 nodes can be built Windows Server 2008 R2. Clusters are categorized in the following manner: • High-Availability Clusters: This type of cluster is known as a Failover cluster. High Availability clusters are implemented when the purpose is to provide highly available services. [ 13 ] Understanding Windows Domains, Domain Users, and SQL Server Security For implementing a failover or high availability cluster one may have up to 16 nodes in a Microsoft Cluster.

DLL that does the task of verifying that SQL resources are online, registry entries are correct, and SQL Server is running in normal mode. It also checks if the system databases are running normally by executing T-SQL. DLL, as either 0 (false) or 1 (true). Resource Monitor depends on the registry for the status information. DLL will call the Online function to bring the resource back online. If it doesn't succeed in the retries (here it executes select @@servername), it finally considers that particular resource as failed and sends it back to Resource Monitor.

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