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Get a glimpse interior Microsoft home windows Server 2003 Insider Solutionswith this excerpt from Chapter 8, "Administering home windows Server 2003 Remotely." click here to examine this chapter or here to buy the ebook.
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Administering home windows Server 2012 examination 70-411 App covers the 2nd of three exams required for Microsoft licensed options associate (MCSA): windows Server 2012 certification. This direction will aid validate the knowledge and capabilities essential to administer a windows Server 2012 Infrastructure in an industry ambiance. The three MCSA exams jointly validate the talents and capabilities necessary for implementing, managing, preserving, and provisioning features and infrastructure in a windows Server 2012 ambiance. This Microsoft professional tutorial direction is mapped to the 70-411 Administering windows Server 2012 exam goals. This App specializes in true abilities for precise jobs and prepares college students to prove mastery of core capabilities such as person and group administration, network entry, and statistics security.
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route outline:lessons:1 Deploying and Managing Server Images2 enforcing Patch Management3 Monitoring Servers4 Configuring distributed File gadget (DFS)5 Configuring File Server useful resource manager (FSRM)6 Configuring File functions and Disk Encryption7 Configuring advanced Audit Policies8 Configuring DNS Zones9 Configuring DNS Records10 Configuring VPN and Routing11 Configuring Direct Access12 Configuring a network coverage Server13 Configuring NPS Policies14 Configuring network entry coverage (NAP)15 Configuring Server Authentication16 Configuring zone Controllers17 maintaining active Directory18 Configuring Account Policies19 Configuring neighborhood policy Processing20 Configuring community policy Setting21 Managing community policy Objects22 Configuring community policy Preferences
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Administering Windows Server 2012 Exam 70-411 App covers the second of three exams required for Microsoft Certified Solutions Associate (MCSA): Windows Server 2012 certification. This course will aid validate the skills and knowledge necessary to administer a Windows Server 2012 Infrastructure in an enterprise environment. The three MCSA exams collectively validate the skills and knowledge necessary for implementing, managing, maintaining, and provisioning services and infrastructure in a Windows Server 2012 environment. This Microsoft Official Academic Course is mapped to the 70-411 Administering Windows Server 2012 exam objectives. This App focuses on true skills for true jobs and prepares students to prove mastery of core services such as user and group management, network access, and data security.
In Administering Windows Server 2012 Exam 70-411 free app giving access for 16 (70%) Lessons and following lesson quiz.
Course Outline:LESSONS:1 Deploying and Managing Server Images2 Implementing Patch Management3 Monitoring Servers4 Configuring Distributed File System (DFS)5 Configuring File Server Resource Manager (FSRM)6 Configuring File Services and Disk Encryption7 Configuring Advanced Audit Policies8 Configuring DNS Zones9 Configuring DNS Records10 Configuring VPN and Routing11 Configuring Direct Access12 Configuring a Network Policy Server13 Configuring NPS Policies14 Configuring Network Access Protection (NAP)15 Configuring Server Authentication16 Configuring Domain Controllers17 Maintaining active Directory18 Configuring Account Policies19 Configuring Group Policy Processing20 Configuring Group Policy Setting21 Managing Group Policy Objects22 Configuring Group Policy Preferences
Disclaimer :This app was not created or endorsed by Microsoft
The following section is topical in approach. Rather than recount any the administrative functions and capabilities of a certain screen, such as the Database Settings page in the SSMS object Explorer, this section provides a top-down view of the most distinguished considerations when designing the storage for an instance of SQL Server 2012 and how to achieve maximum performance, scalability, and reliability.
This section begins with an overview of database files and their weight to overall I/O performance, in “Designing and Administering Database Files in SQL Server 2012,” followed by information on how to execute distinguished step-by-step tasks and management operations. SQL Server storage is centered on databases, although a few settings are adjustable at the instance-level. So, Great weight is placed on proper design and management of database files.
The next section, titled “Designing and Administering Filegroups in SQL Server 2012,” provides an overview of filegroups as well as details on distinguished tasks. Prescriptive guidance too tells distinguished ways to optimize the expend of filegroups in SQL Server 2012.
Next, FILESTREAM functionality and administration are discussed, along with step-by-step tasks and management operations in the section “Designing for BLOB Storage.” This section too provides a brief introduction and overview to another supported system storage called Remote Blob Store (RBS).
Finally, an overview of partitioning details how and when to expend partitions in SQL Server 2012, their most effectual application, common step-by-step tasks, and common use-cases, such as a “sliding window” partition. Partitioning may live used for both tables and indexes, as particular in the upcoming section “Designing and Administrating Partitions in SQL Server 2012.”Designing and Administrating Database Files in SQL Server 2012
Whenever a database is created on an instance of SQL Server 2012, a minimum of two database files are required: one for the database file and one for the transaction log. By default, SQL Server will create a sole database file and transaction log file on the same default destination disk. Under this configuration, the data file is called the Primary data file and has the .mdf file extension, by default. The log file has a file extension of .ldf, by default. When databases need more I/O performance, it’s typical to add more data files to the user database that needs added performance. These added data files are called Secondary files and typically expend the .ndf file extension.
As mentioned in the earlier “Notes from the Field” section, adding multiple files to a database is an effectual passage to enlarge I/O performance, especially when those additional files are used to segregate and offload a portion of I/O. They will provide additional guidance on using multiple database files in the later section titled “Designing and Administrating Multiple Data Files.”
When you contain an instance of SQL Server 2012 that does not contain a elevated performance requirement, a sole disk probably provides adequate performance. But in most cases, especially an distinguished production database, optimal I/O performance is crucial to meeting the goals of the organization.
The following sections address distinguished proscriptive guidance concerning data files. First, design tips and recommendations are provided for where on disk to situation database files, as well as the optimal number of database files to expend for a particular production database. Other guidance is provided to recount the I/O repercussion of certain database-level options.Placing Data Files onto Disks
At this stage of the design process, imagine that you contain a user database that has only one data file and one log file. Where those individual files are placed on the I/O subsystem can contain an tremendous repercussion on their overall performance, typically because they must share I/O with other files and executables stored on the same disks. So, if they can situation the user data file(s) and log files onto divorce disks, where is the best situation to do them?
When designing and segregating I/O by workload on SQL Server database files, there are certain predictable payoffs in terms of improved performance. When separating workload on to divorce disks, it is implied that by “disks” they impress a sole disk, a RAID1, -5, or -10 array, or a volume mount point on a SAN. The following list ranks the best payoff, in terms of providing improved I/O performance, for a transaction processing workload with a sole major database:
Figure 3.5 shows what this configuration might sight like.
Figure 3.5. instance of basic file placement for OLTP workloads.
Figure 3.6 shows an instance of intermediate file placement for OLTP workloads.
Figure 3.6. instance of intermediate file placement for OLTP workloads.
Figure 3.7 shows and instance of advanced file placement for OLTP workloads.
Figure 3.7. instance of advanced file placement for OLTP workloads.
As mentioned earlier, SQL Server defaults to the creation of a sole primary data file and a sole primary log file when creating a unusual database. The log file contains the information needed to outcome transactions and databases fully recoverable. Because its I/O workload is serial, writing one transaction after the next, the disk read-write head rarely moves. In fact, they don’t want it to move. Also, for this reason, adding additional files to a transaction log almost never improves performance. Conversely, data files contain the tables (along with the data they contain), indexes, views, constraints, stored procedures, and so on. Naturally, if the data files reside on segregated disks, I/O performance improves because the data files no longer contend with one another for the I/O of that specific disk.
Less well known, though, is that SQL Server is able to provide better I/O performance when you add secondary data files to a database, even when the secondary data files are on the same disk, because the Database Engine can expend multiple I/O threads on a database that has multiple data files. The generic rule for this technique is to create one data file for every two to four analytic processors available on the server. So, a server with a sole one-core CPU can’t really lift odds of this technique. If a server had two four-core CPUs, for a total of eight analytic CPUs, an distinguished user database might outcome well to contain four data files.
The newer and faster the CPU, the higher the ratio to use. A brand-new server with two four-core CPUs might outcome best with just two data files. too note that this technique offers improving performance with more data files, but it does plateau at either 4, 8, or in rare cases 16 data files. Thus, a commodity server might expose improving performance on user databases with two and four data files, but stops showing any improvement using more than four data files. Your mileage may vary, so live positive to test any changes in a nonproduction environment before implementing them.Sizing Multiple Data Files
Suppose they contain a unusual database application, called BossData, coming online that is a very distinguished production application. It is the only production database on the server, and according to the guidance provided earlier, they contain configured the disks and database files relish this:
Most of the time, BossData has bizarre I/O performance. However, it occasionally slows down for no immediately evident reason. Why would that be?
As it turns out, the size of multiple data files is too important. Whenever a database has one file larger than another, SQL Server will ship more I/O to the great file because of an algorithm called round-robin, proportional fill. “Round-robin” means that SQL Server will ship I/O to one data file at a time, one perquisite after the other. So for the BossData database, the SQL Server Database Engine would ship one I/O first to the primary data file, the next I/O would travel to the first secondary data file in line, the next I/O to the next secondary data file, and so on. So far, so good.
However, the “proportional fill” Part of the algorithm means that SQL Server will focus its I/Os on each data file in gyrate until it is as full, in proportion, to any the other data files. So, if any but two of the data files in the BossData database are 50Gb, but two are 200Gb, SQL Server would ship four times as many I/Os to the two bigger data files in an application to withhold them as proportionately complete as any the others.
In a situation where BossData needs a total of 800Gb of storage, it would live much better to contain eight 100Gb data files than to contain six 50Gb data files and two 200Gb data files.Autogrowth and I/O Performance
When you’re allocating space for the first time to both data files and log files, it is a best exercise to goal for future I/O and storage needs, which is too known as capacity planning.
In this situation, estimate the amount of space required not only for operating the database in the near future, but estimate its total storage needs well into the future. After you’ve arrived at the amount of I/O and storage needed at a reasonable point in the future, bellow one year hence, you should preallocate the specific amount of disk space and I/O capacity from the beginning.
Over-relying on the default autogrowth features causes two significant problems. First, growing a data file causes database operations to slack down while the unusual space is allocated and can lead to data files with widely varying sizes for a sole database. (Refer to the earlier section “Sizing Multiple Data Files.”) Growing a log file causes write activity to halt until the unusual space is allocated. Second, constantly growing the data and log files typically leads to more analytic fragmentation within the database and, in turn, performance degradation.
Most experienced DBAs will too set the autogrow settings sufficiently elevated to avoid frequent autogrowths. For example, data file autogrow defaults to a scant 25Mb, which is certainly a very little amount of space for a diligent OLTP database. It is recommended to set these autogrow values to a considerable percentage size of the file expected at the one-year mark. So, for a database with 100Gb data file and 25GB log file expected at the one-year mark, you might set the autogrowth values to 10Gb and 2.5Gb, respectively.
Additionally, log files that contain been subjected to many tiny, incremental autogrowths contain been shown to underperform compared to log files with fewer, larger file growths. This phenomena occurs because each time the log file is grown, SQL Server creates a unusual VLF, or virtual log file. The VLFs connect to one another using pointers to expose SQL Server where one VLF ends and the next begins. This chaining works seamlessly behind the scenes. But it’s simple common sense that the more often SQL Server has to read the VLF chaining metadata, the more overhead is incurred. So a 20Gb log file containing four VLFs of 5Gb each will outperform the same 20Gb log file containing 2000 VLFs.Configuring Autogrowth on a Database File
To configure autogrowth on a database file (as shown in figure 3.8), follow these steps:
You can alternately expend the following Transact-SQL syntax to modify the Autogrowth settings for a database file based on a growth rate of 10Gb and an unlimited maximum file size:USE [master] GO ALTER DATABASE [AdventureWorks2012] MODIFY FILE ( appellation = N'AdventureWorks2012_Data', MAXSIZE = UNLIMITED , FILEGROWTH = 10240KB ) GO Data File Initialization
Anytime SQL Server has to initialize a data or log file, it overwrites any residual data on the disk sectors that might live hanging around because of previously deleted files. This process fills the files with zeros and occurs whenever SQL Server creates a database, adds files to a database, expands the size of an existing log or data file through autogrow or a manual growth process, or due to a database or filegroup restore. This isn’t a particularly time-consuming operation unless the files involved are large, such as over 100Gbs. But when the files are large, file initialization can lift quite a long time.
It is practicable to avoid complete file initialization on data files through a technique convene instant file initialization. Instead of writing the entire file to zeros, SQL Server will overwrite any existing data as unusual data is written to the file when instant file initialization is enabled. Instant file initialization does not labor on log files, nor on databases where transparent data encryption is enabled.
SQL Server will expend instant file initialization whenever it can, provided the SQL Server service account has SE_MANAGE_VOLUME_NAME privileges. This is a Windows-level leave granted to members of the Windows Administrator group and to users with the execute Volume Maintenance stint security policy.
For more information, mention to the SQL Server Books Online documentation.Shrinking Databases, Files, and I/O Performance
The Shrink Database stint reduces the physical database and log files to a specific size. This operation removes excess space in the database based on a percentage value. In addition, you can enter thresholds in megabytes, indicating the amount of shrinkage that needs to lift situation when the database reaches a certain size and the amount of free space that must remain after the excess space is removed. Free space can live retained in the database or released back to the operating system.
It is a best exercise not to shrink the database. First, when shrinking the database, SQL Server moves complete pages at the intermission of data file(s) to the first open space it can find at the dawn of the file, allowing the intermission of the files to live truncated and the file to live shrunk. This process can enlarge the log file size because any moves are logged. Second, if the database is heavily used and there are many inserts, the data files may contain to grow again.
SQL 2005 and later addresses slack autogrowth with instant file initialization; therefore, the growth process is not as slack as it was in the past. However, sometimes autogrow does not snare up with the space requirements, causing a performance degradation. Finally, simply shrinking the database leads to extreme fragmentation. If you absolutely must shrink the database, you should outcome it manually when the server is not being heavily utilized.
You can shrink a database by right-clicking a database and selecting Tasks, Shrink, and then Database or File.
Alternatively, you can expend Transact-SQL to shrink a database or file. The following Transact=SQL syntax shrinks the AdventureWorks2012 database, returns freed space to the operating system, and allows for 15% of free space to remain after the shrink:USE [AdventureWorks2012] GO DBCC SHRINKDATABASE(N'AdventureWorks2012', 15, TRUNCATEONLY) GO Administering Database Files
The Database Properties dialog box is where you manage the configuration options and values of a user or system database. You can execute additional tasks from within these pages, such as database mirroring and transaction log shipping. The configuration pages in the Database Properties dialog box that impress I/O performance comprehend the following:
The upcoming sections recount each page and setting in its entirety. To invoke the Database Properties dialog box, execute the following steps:
The second Database Properties page is called Files. Here you can change the owner of the database, enable full-text indexing, and manage the database files, as shown in figure 3.9.
Figure 3.9. Configuring the database files settings from within the Files page.Administrating Database Files
Use the Files page to configure settings pertaining to database files and transaction logs. You will expend time working in the Files page when initially rolling out a database and conducting capacity planning. Following are the settings you’ll see:
Perform the following steps to enlarge the data file for the AdventureWorks2012 database using SSMS:
Keep in intelligence that many other database options can contain a profound, if not at least a nominal, repercussion on I/O performance. To sight at these options, right-click the database appellation in the SSMS object Explorer, and then select Properties. The Database Properties page appears, allowing you to select Options or Change Tracking. A few things on the Options and Change Tracking tabs to withhold in intelligence comprehend the following:
Filegroups are used to house data files. Log files are never housed in filegroups. Every database has a primary filegroup, and additional secondary filegroups may live created at any time. The primary filegroup is too the default filegroup, although the default file group can live changed after the fact. Whenever a table or index is created, it will live allocated to the default filegroup unless another filegroup is specified.
Filegroups are typically used to situation tables and indexes into groups and, frequently, onto specific disks. Filegroups can live used to stripe data files across multiple disks in situations where the server does not contain RAID available to it. (However, placing data and log files directly on RAID is a superior solution using filegroups to stripe data and log files.) Filegroups are too used as the analytic container for special purpose data management features relish partitions and FILESTREAM, both discussed later in this chapter. But they provide other benefits as well. For example, it is practicable to back up and retrieve individual filegroups. (Refer to Chapter 6 for more information on recovering a specific filegroup.)
To execute standard administrative tasks on a filegroup, read the following sections.Creating Additional Filegroups for a Database
Perform the following steps to create a unusual filegroup and files using the AdventureWorks2012 database with both SSMS and Transact-SQL:
Alternately, you may create a unusual filegroup as a set of adding a unusual file to a database, as shown in figure 3.10. In this case, execute the following steps:
Alternatively, you can expend the following Transact-SQL script to create the unusual filegroup for the AdventureWorks2012 database:USE [master] GO ALTER DATABASE [AdventureWorks2012] ADD FILEGROUP [SecondFileGroup] GO Creating unusual Data Files for a Database and Placing Them in Different Filegroups
Now that you’ve created a unusual filegroup, you can create two additional data files for the AdventureWorks2012 database and situation them in the newly created filegroup:
The earlier image, in figure 3.10, showed the basic elements of the Database Files page. Alternatively, expend the following Transact-SQL syntax to create a unusual data file:USE [master] GO ALTER DATABASE [AdventureWorks2012] ADD FILE (NAME = N'AdventureWorks2012_Data2', FILENAME = N'C:\AdventureWorks2012_Data2.ndf', SIZE = 10240KB , FILEGROWTH = 1024KB ) TO FILEGROUP [SecondFileGroup] GO Administering the Database Properties Filegroups Page
As stated previously, filegroups are a Great passage to organize data objects, address performance issues, and minimize backup times. The Filegroup page is best used for viewing existing filegroups, creating unusual ones, marking filegroups as read-only, and configuring which filegroup will live the default.
To improve performance, you can create subsequent filegroups and situation database files, FILESTREAM data, and indexes onto them. In addition, if there isn’t enough physical storage available on a volume, you can create a unusual filegroup and physically situation any files on a different volume or LUN if a SAN is used.
Finally, if a database has static data such as that establish in an archive, it is practicable to creep this data to a specific filegroup and tag that filegroup as read-only. Read-only filegroups are extremely speedy for queries. Read-only filegroups are too simple to back up because the data rarely if ever changes.
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