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Lesson Review
UPC-A Generation In Visual C#
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You can use the following questions to test your knowledge of the information in Les son 3, Merge Replication. The questions are also available on the companion CD if you prefer to review them in electronic form.
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Barcode Decoder In C#.NET
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NOTE
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Answers
Universal Product Code Version A Generator In VB.NET
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Data Matrix Generation In C#
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Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
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UPCA Generation In C#
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1. Consolidated Messenger distributes packages between businesses in down town New York. Orders are received at the central office, and messengers on inline skates receive pickup and delivery instructions through their Pocket PC powered devices that use merge replication to synchronize data. When pack ages are received and delivered, the messenger collects a signature from the cus tomer that triggers an update to the order record. Global positioning system (GPS) devices carried in the messengers backpacks continuously transmit
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Drawing USD-4 In C#
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11
PDF-417 2d Barcode Recognizer In Visual Basic .NET
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Replication
Code 128A Reader In C#.NET
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Decode Bar Code In C#.NET
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location data to the office so that delivery progress can be tracked. Because changes occur to the same order data at both the central office and at the mes senger, how should you design the database, replication, and conflict resolution A. One table that contains the delivery order and receipt/delivery informa tion, one publication from the central office to messengers, and Publisher Always Wins conflict resolution B. One table that contains the delivery order and receipt/delivery informa tion, one publication from the central office to messengers, and Subscriber Always Wins conflict resolution C. One table that contains the delivery order and receipt/delivery informa tion, one publication from each messenger to the central office, and Pub lisher Always Wins conflict resolution D. One table for the delivery order and one table for the receipt/delivery infor mation, one publication from the central office to each messenger, and Pub lisher Always Wins conflict resolution E. One table for the delivery order and one table for the receipt/delivery infor mation, one publication from the central office to each messenger with the data for the delivery order, one publication from the central office to each messenger with the receipt/delivery data, Publisher Always Wins conflict resolution on the delivery order publication, and Publisher Always Wins conflict resolution on the receipt/delivery data F. One table for the delivery order and one table for the receipt/delivery infor mation, one publication from the central office to each messenger with the data for the delivery order, one publication from the central office to each messenger with the receipt/delivery data, Publisher Always Wins conflict resolution on the delivery order publication, and Subscriber Always Wins conflict resolution on the receipt/delivery data
Draw Universal Product Code Version A In Java
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Creating Bar Code In None
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Lesson 4: Designing Failover and Failback Strategies
Decoding UPC Symbol In C#
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Lesson 4: Designing Failover and Failback Strategies
Because replication is scoped at a database level, it requires the same manual pro cesses for applying instance-level objects that were described in 10, Log Shipping. In addition to instance-level objects, replication requires processes that vary based on the method of replication that you have deployed. This lesson describes the failover and failback processes for each replication method that you can employ in an avail ability architecture.
After this lesson, you will be able to:
Design a high-availability solution that is based on replication.
Specify an appropriate replication solution. Choose servers for peer-to-peer replication. Establish a strategy for resolving data conflicts. Design an application failover strategy. Design a strategy to reconnect client applications.
Estimated lesson time: 45 minutes
Failover
The failover process with replication varies with the replication architecture you deploy. Failover in any replication architecture has a few common characteristics. Replication is concerned with sending INSERT, UPDATE, and DELETE statements between pub lisher and subscriber. Replication does not ensure that changes to the following objects are sent to the subscriber:
Procedures Views Functions Synonyms Triggers Assemblies
11
Replication
Certificates Symmetric/asymmetric keys Users and Permissions DDL triggers
You must ensure that each of these objects is created on the subscriber as well as maintained when changes are made to the publisher.
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