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Again, depending on your level of write activity on the principal and the time elapsed for the full backup, copy, and restore sequence, you will probably have taken one or more transaction log backups on the principal during this period You should also use backup compression here if possible Each of these backup files should be copied over to the mirror instance, where they need to be restored with NORECOVERY,.

choose file with prompt "Choose the photos you want to crop to 4 x 3:" default location (path to the pictures folder) with multiple selections allowed without invisibles

Using database mirroring to become a superhero!

Front-to-Side Ratio The front-to-side (f/s) ratio is another expression of the directivity of an antenna system The term applies to unidirectional antennas, and also to bidirectional antennas The f/s ratio is expressed in decibels (dBd), just as is the f/b ratio The EM field strength in the favored direction is compared with the field strength at right angles to the favored direction An example is shown in Fig 27-7 The f/s ratios are found, in this case, by comparing the signal levels between north and east (righthand f/s), or between north and west (left-hand f/s) The right-hand and left-hand f/s ratios are usually the same in theory, although they can differ slightly in practice

in sequence Depending on how long the full backup took, some of the initial transaction log backup restores will be skipped when you try to restore them, because their log sequence numbers will be included in the full backup With SQL Server 2008, you must back up and restore at least one log backup; otherwise you will not be able to establish the mirror For example, if your full backup, copy, and restore took six hours, your mirror will be about six hours behind the principal after the full restore is finished You will usually find that the transaction log restores go relatively quickly, and you will start to rapidly catch up to the principal.

There s one other parameter for the choose file command: the showing package contents parameter Add this parameter when you need the user to be able to poke inside package files and pick out files they contain The contents of package files are normally hidden, but you can display them in the Finder by CTRL-clicking or right-clicking a package file and choosing Show Package Contents from the shortcut menu

If you are taking hourly transaction log backups on the principal, you will typically see the restore take a few minutes (depending on several factors, mainly I/O capacity on the mirror), which will allow you to eventually catch up to the principal It is important to try to catch up as much as possible, because SQL Server will refuse to establish the mirror if it is too far behind the principal After you are caught up as closely as possible, you need to create the mirroring endpoints and issue the appropriate ALTER DATABASE commands to establish the mirror The database mirroring wizard in SQL Server Management Studio (SSMS) works well enough for this, but beware that it will want to start the mirroring session in high-safety mode (synchronous) by default, which I do not recommend You can also use T-SQL to do this.

A phased array uses two or more driven elements (radiators connected directly to the feed line) to produce gain in some directions at the expense of other directions

After the user picks a file in the Choose A File dialog box and clicks the Choose button, the choose file command returns an alias to the file for example:

In most cases, you should start database mirroring in highperformance mode (asynchronous), to make sure that the performance of the principal is not negatively affected by the mirror trying to get fully synchronized The SSMS tool called Database Mirroring Monitor, which was introduced with SQL Server 2005 SP1, makes it much easier to watch what is going on as the databases get synchronized You can also watch some database mirroring specific counters in Performance Monitor (under SQL Server: Database Mirroring), and you can run some system catalog and Dynamic Management View (DMV) queries to monitor database mirroring Some of these are shown in listing 2..