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Creating a Compression Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359 Implementing the Client-Side Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . 361 Implementing the Server-Side Sink . . . . . . . . . . . . . . . . . . . . . . . . . . 364 Creating the Sink Providers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367 Using the Sinks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 Extending the Compression Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371 Encrypting the Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375 Essential Symmetric Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376 Creating the Sinks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380 Creating the Providers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386 Passing Runtime Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390 Changing the Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402 Using This Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408 Avoiding the BinaryFormatter Version Mismatch . . . . . . . . . . . . . . . . . . . . 409 Using a Custom Proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413 Some Final Words of Caution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419

Cardinality (8i)

Chances are you see your doctor at regular intervals. The dentist you ll see every six months, and the family physician you ll see every year. Just as your body needs to be maintained in regular intervals, so must your computer. Maintenance scripts run at scheduled times, and if one is missed, much like a doctor s appointment, it is usually scheduled for the next available time. Maintenance scripts need to be run because they log what devices were plugged into a system, they back up the user database, and they do much more. Machines can be left off at night, laptops can get closed, and power outages can disable a system, helping to explain the disparity in time stamps you may

There are still a couple of default settings that slapconfig is using during the Open Directory Master promotion process. These include the search base suffix and the Kerberos realm. According to Microsoft, A search base (the distinguished name of the search base object) defines the location in the directory from which the LDAP search begins. The search base suffix is, by default, derived using the DNS name of the server. To obtain the search base suffix for a given Open Directory Master, you can run the slapconfig command with the defaultsuffix query. The realm is the name of the Kerberos realm that will be used. This, too, is generated based on an enumeration of the server s host name (are you starting to put together why DNS is so important ). However, it can be customized during the createmasterandadmin process.

After the files are downloaded, copy them to the desktop on your Ubuntu machine, using a floppy disk or maybe a USB memory stick. Then open a command-prompt window on the Ubuntu computer by clicking Applications Accessories Terminal. In the terminal window, type the following, hitting Enter after each line:

Listing 15-4. ConnInfoMessage()

At the Image Settings screen, first provide a name that the mounted disk image will have in the Network Disk field as you can see in Figure 6-10. Then provide an explanation of what the image is for in the Description field. If the image will be hosted from multiple NetBoot or NetRestore servers, next click on the check box for Image will be served from more than one server. Finally, provide the particulars for creating a new local administrative account for the restored computer, including a name, short name and password. When you re satisfied with your settings, click on the Create button.