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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.
publication summary:in situation of being a natural planning, design, and implementation guide, this booklet is a serious aid for home windows specialists to locate tips, tricks, and foremost practices for enforcing and helping key home windows Server 2003 technologies. The authors started working with home windows Server 2003 (then codename Whistler) just days after the code for windows 2000 become locked, when most corporations exist pleased been getting a primary probability to Look the windows 2000 server product. With more than three years of experience working with Whistler in early beta and construction implementations, the authors of this booklet exist pleased offered a useful resource to aid you are making home windows 2003 technologies toil effectively.
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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 erudition and capabilities needful to administer a windows Server 2012 Infrastructure in an trade 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 existent 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.
In Administering windows Server 2012 exam 70-411 free app giving entry for 16 (70%) lessons and following lesson quiz.
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 lively Directory18 Configuring Account Policies19 Configuring neighborhood policy Processing20 Configuring community policy Setting21 Managing community policy Objects22 Configuring community policy Preferences
Disclaimer :This app become not created or recommended by means of Microsoft
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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 succor validate the skills and erudition necessary to administer a Windows Server 2012 Infrastructure in an enterprise environment. The three MCSA exams collectively validate the skills and erudition 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 existent skills for existent 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 lively 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 narrate sum the administrative functions and capabilities of a unavoidable screen, such as the Database Settings page in the SSMS demur Explorer, this section provides a top-down view of the most essential 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 significance to overall I/O performance, in “Designing and Administering Database Files in SQL Server 2012,” followed by information on how to discharge essential 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, powerful significance 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 essential tasks. Prescriptive guidance moreover tells essential ways to optimize the exercise 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 moreover provides a brief introduction and overview to another supported routine storage called Remote Blob Store (RBS).
Finally, an overview of partitioning details how and when to exercise partitions in SQL Server 2012, their most efficient application, common step-by-step tasks, and common use-cases, such as a “sliding window” partition. Partitioning may exist used for both tables and indexes, as circumstantial 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 unique 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 exigency 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 exercise the .ndf file extension.
As mentioned in the earlier “Notes from the Field” section, adding multiple files to a database is an efficient route to expand 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 exist pleased an instance of SQL Server 2012 that does not exist pleased a towering performance requirement, a unique disk probably provides adequate performance. But in most cases, especially an essential production database, optimal I/O performance is crucial to meeting the goals of the organization.
The following sections address essential 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 exercise for a particular production database. Other guidance is provided to narrate the I/O impact of unavoidable database-level options.Placing Data Files onto Disks
At this stage of the design process, imagine that you exist pleased 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 exist pleased an stupendous impact on their overall performance, typically because they must partake 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 reserve them?
When designing and segregating I/O by workload on SQL Server database files, there are unavoidable predictable payoffs in terms of improved performance. When separating workload on to divorce disks, it is implied that by “disks” they imply a unique 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 unique major database:
Figure 3.5 shows what this configuration might Look like.
Figure 3.5. illustration of basic file placement for OLTP workloads.
Figure 3.6 shows an illustration of intermediate file placement for OLTP workloads.
Figure 3.6. illustration of intermediate file placement for OLTP workloads.
Figure 3.7 shows and illustration of advanced file placement for OLTP workloads.
Figure 3.7. illustration of advanced file placement for OLTP workloads.
As mentioned earlier, SQL Server defaults to the creation of a unique primary data file and a unique primary log file when creating a recent database. The log file contains the information needed to accomplish 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 hold 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 exercise multiple I/O threads on a database that has multiple data files. The universal rule for this technique is to create one data file for every two to four rational processors available on the server. So, a server with a unique one-core CPU can’t really rob odds of this technique. If a server had two four-core CPUs, for a total of eight rational CPUs, an essential user database might finish well to exist pleased 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 finish best with just two data files. moreover 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 interpret 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 exist certain to test any changes in a nonproduction environment before implementing them.Sizing Multiple Data Files
Suppose they exist pleased a recent database application, called BossData, coming online that is a very essential production application. It is the only production database on the server, and according to the guidance provided earlier, they exist pleased configured the disks and database files like 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 moreover important. Whenever a database has one file larger than another, SQL Server will route more I/O to the large file because of an algorithm called round-robin, proportional fill. “Round-robin” means that SQL Server will route I/O to one data file at a time, one prerogative after the other. So for the BossData database, the SQL Server Database Engine would route 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” fragment of the algorithm means that SQL Server will focus its I/Os on each data file in circle until it is as full, in proportion, to sum the other data files. So, if sum but two of the data files in the BossData database are 50Gb, but two are 200Gb, SQL Server would route four times as many I/Os to the two bigger data files in an distress to hold them as proportionately replete as sum the others.
In a situation where BossData needs a total of 800Gb of storage, it would exist much better to exist pleased eight 100Gb data files than to exist pleased 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 purpose for future I/O and storage needs, which is moreover known as capacity planning.
In this situation, appraise the amount of space required not only for operating the database in the near future, but appraise 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, content 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 gradual down while the recent space is allocated and can lead to data files with widely varying sizes for a unique database. (Refer to the earlier section “Sizing Multiple Data Files.”) Growing a log file causes write activity to desist until the recent space is allocated. Second, constantly growing the data and log files typically leads to more rational fragmentation within the database and, in turn, performance degradation.
Most experienced DBAs will moreover set the autogrow settings sufficiently towering to avoid frequent autogrowths. For example, data file autogrow defaults to a scanty 25Mb, which is certainly a very little amount of space for a assiduous 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 exist pleased been subjected to many tiny, incremental autogrowths exist pleased 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 recent VLF, or virtual log file. The VLFs connect to one another using pointers to interpret 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 design 3.8), ensue these steps:
You can alternately exercise 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 ( cognomen = 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 exist 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 rob quite a long time.
It is viable to avoid replete 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 recent data is written to the file when instant file initialization is enabled. Instant file initialization does not toil on log files, nor on databases where transparent data encryption is enabled.
SQL Server will exercise instant file initialization whenever it can, provided the SQL Server service account has SE_MANAGE_VOLUME_NAME privileges. This is a Windows-level consent granted to members of the Windows Administrator group and to users with the discharge Volume Maintenance chore security policy.
For more information, refer to the SQL Server Books Online documentation.Shrinking Databases, Files, and I/O Performance
The Shrink Database chore 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 rob situation when the database reaches a unavoidable size and the amount of free space that must remain after the excess space is removed. Free space can exist 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 replete pages at the discontinue of data file(s) to the first open space it can find at the climb of the file, allowing the discontinue of the files to exist truncated and the file to exist shrunk. This process can expand the log file size because sum moves are logged. Second, if the database is heavily used and there are many inserts, the data files may exist pleased to grow again.
SQL 2005 and later addresses gradual autogrowth with instant file initialization; therefore, the growth process is not as gradual as it was in the past. However, sometimes autogrow does not tangle up with the space requirements, causing a performance degradation. Finally, simply shrinking the database leads to inordinate fragmentation. If you absolutely must shrink the database, you should finish 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 exercise 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 move I/O performance comprise the following:
The upcoming sections narrate each page and setting in its entirety. To invoke the Database Properties dialog box, discharge 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 design 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 spend 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 expand the data file for the AdventureWorks2012 database using SSMS:
Keep in sarcasm that many other database options can exist pleased a profound, if not at least a nominal, impact on I/O performance. To Look at these options, right-click the database cognomen in the SSMS demur 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 hold in sarcasm comprise 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 exist created at any time. The primary filegroup is moreover the default filegroup, although the default file group can exist changed after the fact. Whenever a table or index is created, it will exist 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 exist used to stripe data files across multiple disks in situations where the server does not exist pleased 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 moreover used as the rational container for special purpose data management features like partitions and FILESTREAM, both discussed later in this chapter. But they provide other benefits as well. For example, it is viable to back up and regain individual filegroups. (Refer to Chapter 6 for more information on recovering a specific filegroup.)
To discharge touchstone administrative tasks on a filegroup, read the following sections.Creating Additional Filegroups for a Database
Perform the following steps to create a recent filegroup and files using the AdventureWorks2012 database with both SSMS and Transact-SQL:
Alternately, you may create a recent filegroup as a set of adding a recent file to a database, as shown in design 3.10. In this case, discharge the following steps:
Alternatively, you can exercise the following Transact-SQL script to create the recent filegroup for the AdventureWorks2012 database:USE [master] GO ALTER DATABASE [AdventureWorks2012] ADD FILEGROUP [SecondFileGroup] GO Creating recent Data Files for a Database and Placing Them in Different Filegroups
Now that you’ve created a recent filegroup, you can create two additional data files for the AdventureWorks2012 database and situation them in the newly created filegroup:
The earlier image, in design 3.10, showed the basic elements of the Database Files page. Alternatively, exercise the following Transact-SQL syntax to create a recent 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 powerful route to organize data objects, address performance issues, and minimize backup times. The Filegroup page is best used for viewing existing filegroups, creating recent ones, marking filegroups as read-only, and configuring which filegroup will exist the default.
To better 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 recent filegroup and physically situation sum files on a different volume or LUN if a SAN is used.
Finally, if a database has static data such as that organize in an archive, it is viable to sprint this data to a specific filegroup and stamp that filegroup as read-only. Read-only filegroups are extremely rapid for queries. Read-only filegroups are moreover facile to back up because the data rarely if ever changes.
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