TAILIEUCHUNG - Microsoft SQL Server 2008 R2 Unleashed- P68

Microsoft SQL Server 2008 R2 Unleashed- P68:SQL Server 2005 provided a number of significant new features and enhancements over what was available in SQL Server 2000. This is not too surprising considering there was a five-year gap between these major SQL Server 2008 is not as much of a quantum leap forward from SQL Server 2005 | 614 CHAPTER 19 Replication Setting a minimum amount of memory allocated to SQL Server by using the Min Server Memory option to guarantee ample memory across the board. Using good disk drive physical separation rules such as keeping the transaction log on a separate disk drive from the data portion. Your transaction log is much more heavily used when you opt for transactional replication. Putting your snapshot working directory on a separate disk drive to minimize disk drive arm contention. You should use a separate snapshot folder for each publication. Publishing only what you need. By selectively publishing only the minimum amount of data required you implement a much more efficient replication configuration which is faster overall. Trying to run snapshots in nonpeak times so your network and production environments aren t bogged down. Minimizing transformation of data involved with replication. Log Shipping If you have a small need to create a read-only ad hoc query reporting database environment that can tolerate a high degree of data latency you might be a candidate for using log shipping. Log shipping is still a feature for SQL Server 2008 but it will be deprecated by the next release. In other words it might be easy to use and easy to manage but it is being phased out as a feature of SQL Server. For this reason we do not describe it in this book it is described in detail in SQL Server 2000 Unleashed though . For those who have current log shipping configurations it is time to move to database mirroring. This transition will be easy because the two capabilities are so much alike. Actually many aspects of database mirroring came from log shipping. Data Replication and Database Mirroring for Fault Tolerance and High Availability SQL Server 2008 allows you to use combinations of options to achieve higher availability levels. A prime example is combining data replication with database mirroring to provide maximum availability of data scalability to users and fault

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