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Download Microsoft SQL Server 2008 High Availability by Hemantgiri S. Goswami PDF

Posted On April 11, 2017 at 6:52 am by / Comments Off on Download Microsoft SQL Server 2008 High Availability by Hemantgiri S. Goswami PDF

By Hemantgiri S. Goswami

With transparent step by step directions, a variety of genuine global examples, and lots of screenshots, this publication presents the entire help and tips you'll want as you start to put in numerous SQL Server HA strategies. when you are an SQL Server developer, or a approach administrator, or perhaps a amateur DBA, then this ebook is for you. It purely calls for you to have a easy knowing of ways SQL Server works to get you thru the deploy of SQL Server HA.

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It is very possible that sometimes a change is done at the node that is the owner or active node, which then fails before sending the data back to another node in the cluster; in this case the cluster will not work. The nodes in clusters vote and based on that it will be decided whether or not the node should continue; for example, there is a four-node cluster and three of them can talk to each other but not the node3. Quorum is a resource where all events pertaining to SQL Server Clusters get logged or recorded on a separate disk.

The cluster architecture forces us to use shared disk resources, as the disk to be used with the cluster environment should be accessible by any of the nodes. The shared disk plays a vital role in the cluster, because it stores not only data files, but logs, FILESTREAM files, and full-text index files. In case of failover, the preferred node will have access and ownership for the disk resource so that clients can access the database system without any interruption. The shared disk should be reliable and fault tolerant as it stores database files.

Here, in the case of clustering, the meaning is no different. As we all know by now, the cluster nodes send and receive information over the network. It is very possible that sometimes a change is done at the node that is the owner or active node, which then fails before sending the data back to another node in the cluster; in this case the cluster will not work. The nodes in clusters vote and based on that it will be decided whether or not the node should continue; for example, there is a four-node cluster and three of them can talk to each other but not the node3.

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