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After the mirror was established and synchronized, you could run that way as long as needed until you were ready to fail over each database to the mirror You would also need to ensure that all of your applications had the failover partner information added to their connection strings Failing over from SQL Server 2005 to SQL Server 2008 usually takes less than a minute, depending on your workload Be aware that this is a one-way trip After you have failed over from SQL Server 2005 to SQL Server 2008, you cannot go back (and, in fact, your 2005 copy of the database will be corrupted) After you failed over each database from SQL Server 2005 to 2008, you would remove the mirroring session for that database.

8:

You would change the compatibility level to SQL Server 2008 (100) because it will still be SQL Server 2005 (90) you originally restored it from a SQL Server 2005 backup This assumes that your application has been tested and is fully compatible with SQL Server 2008 (100) compatibility mode I would also consider running sp_updatestats on the upgraded database(s) during a non-peak period Then you would enable all of your transferred SQL Server Agent jobs on the new server Finally, you are ready to take advantage of the great new features in SQL Server 2008, and you were able to upgrade with a small outage and no loss of data..

14 Consider a single-turn, closed loop having a circumference of 65 ft Suppose this loop is circular, lies entirely in a single plane, is fed with open-wire transmission line and an antenna tuner, and is operated at 7 MHz The maximum radiation and response for this loop can be expected to occur (a) in the plane containing the loop (b) along a line perpendicular to the plane containing the loop (c) along a line coinciding with the path of the feed line (d) equally in all directions in three-dimensional space 15 Suppose the total resistance in an antenna system is 80 , and the loss resistance is 20 The efficiency of the system is (a) 80 percent (b) 75 percent (c) 25 percent (d) impossible to determine without more information 16 In a parasitic array, a director is usually (a) tuned to a slightly higher frequency than the driven element (b) connected to a system of ground radials (c) a closed loop that is grounded for RF (d) a straight length of wire or tubing 17 A J pole is a modified form of (a) ground-plane antenna (b) folded dipole antenna (c) quad antenna (d) zepp antenna 18 Which of the following antenna types is well suited to use with parallel-wire transmission line (a) The ground plane (b) The ground-mounted vertical (c) The folded dipole (d) None of the above 19 Which of the following antenna types is not designed for transmitting at 10 GHz (a) A horn antenna (b) A dish antenna (c) A zepp antenna (d) A helical antenna

Another common problem that can be easily solved with database mirroring is moving large volumes of live SQL Server data from one location to another, with little downtime. This could be from one server to another server, from one storage device to another storage device, or from one geographic location to another.

Figure 8-23 Without any parameters, the Choose A Folder dialog box displays no prompt and hides invisible folders

A couple of years ago, I was faced with moving about 3 TB of data that was in several busy SQL Server 2005 OLTP databases from an older server host and SAN to a new server host and SAN about 50 yards away. Let s examine a case study in which I employed database mirroring for exactly this purpose. The system ran 24/7/365, with a five nines availability requirement. These business constraints eliminated any possibility of using a conventional full backup and restore sequence, because I estimated that it would take about 18 hours for a full backup, file copy, and full restore to complete, which was unacceptable to the business.