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The Perf and Scale Cluster Simple environments such as the one box can be used to conduct performance profiling tests and even page load time tests (covered later in this chapter). The perf and scale cluster is used for conducting a different type of system-level test. In the services world, when components are spread out across computers, various components become bogged down before others do. Performance testing for services is often about finding the right balance of hardware to produce an efficient and performant system. Another challenge with services is that they can become bottlenecked as they are scaled up or out. The term scale up is commonly used to refer to an increased amount of data in the system. An e-mail inbox with 10 e-mail messages will behave very differently from an inbox with thousands of messages in it. Many services will either begin to perform slowly or will just stop working altogether because the amount of data grew beyond what was expected or tested for. Scale out refers to a service being able to increase capacity by adding additional computers. The scale unit approach discussed earlier in this chapter helps create logical purchasing and production units for a service so that it can continue to scale out. The goal of scale out is really about identifying how best to configure the number of servers of each type, the configuration of the hardware, and the configuration of the operating system to maximize the output of the whole system at the lowest cost. This testing is useful in producing early capacity models.

CREATE TABLE dbo.CNUsage ( id INT IDENTITY(1,1) NOT NULL, cn ComplexNumberCS NULL );

The field is part of the type s state, as opposed to being part of an object s state . The field is associated with an instance of the type, not the type itself . The field can be written to only by code contained in a constructor method . Code that accessed the field is not subject to some thread-unsafe optimizations that may be performed by the compiler, the CLR, or by hardware . Only the following types can be marked volatile: all reference types, Single, Boolean, Byte, SByte, Int16, UInt16, Int32, UInt32, Char, and all enumerated types with an underlying type of Byte, SByte, Int16, UInt16, Int32, or UInt32 . Volatile fields are discussed in 28, Primitive Thread Synchronization Constructs .

the fbStatic and fbInstance variables refer to two separate Feedback delegate objects that are initialized, as shown in Figure 17-2 .

On the Type A Printer Name page, accept or revise the printer name. The printer will be set as the default printer unless you clear the check box. Click Next. On the Printer Sharing page, accept or revise the share name. Add a location and comments if wanted. Click Next.

Case-insensitive search (no distinction between uppercase and lowercase) Case-sensitive search Allows the period (.) to match the newline character Treat text as multiple lines; ^ and $ refer to the beginning and end of any of those lines

First we will map the one-to-many relationship between the Conference and Track POJOs. Let s start with a basic Conference HBM file with the simple field-to-column property mappings as shown in Listing 4-16. Listing 4-16. HBM Skeleton for the Conference Class < xml version="1.0" > <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.integrallis.techconf.domain"> <class name="Conference" table="conference"> <id column="PK_ID" name="Id" type="integer" > <generator class="identity" /> </id> <property name="AbstractSubmissionStartDate" length="19" not-null="true" type="timestamp" /> <property name="Name" length="64" not-null="true" type="string" />

1. In the Entities section of any solution, expand an entity record and click the type of relationship you want in the navigation pane (such as N:1 Relationships). 2. Double-click the entity relationship for which you want to modify or add a relationship mapping.

If the IDbCommand uses positional parameters (as with the OLE Data Provider implementation), the IDbDataParameter instances must be placed in the collection in the same order they occur in the statement. Named parameters can be added in any order and will be mapped correctly during command execution. If a stored procedure provides a return value, the parameter to receive the return value must always be the first IDbDataParameter in the collection. Table 16-7 summarizes the members of IDbDataParameter.

Part III: Programming .NET with C#........................................................... 123