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Beginning in 2005, Fabrikam began to see a strong increase in the number of sub scribers, a trend that has continued to the present day. As a result of this growth, the response time for users logging in to the Web site has begun to increase noticeably. At present, Fabrikam has approximately 55,000 registered subscribers. Studies have shown that no more than 10 percent of the current subscribers are ever logged on at any one time.
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To solve the problem of poor response times, the company owner, Tom McMartin, has ordered a capacity planning study. The study has two specific aims: first, to determine whether the database server (named DBSRV1) that is currently holding the customer accounts is experiencing a performance bottleneck in the processor, memory, or disk subsystems; second, if a bottleneck is spotted, to design a replacement database server that meets the technical and business requirements of the company for the next four years.
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A single database server named DBSRV1 contains both the Customer and Music data bases. DBSRV1 is running SQL Server 2000 Enterprise Edition on Windows 2000 Advanced Server. The server includes four CPUs running at 1.1 GHz, 4 GB of RAM, and five physical disks at 10 GB apiece. Of the five physical disks, the first two form a mirrored volume containing the operating system, SQL Server, and the transaction log. The remaining three disks are used to support a RAID 5 and contain both the Customer and Music databases. The current size of the Customer database is 150 MB,
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and the database has been growing at a rate of nearly 6 percent per month for the past year. Customer growth is occurring at the same rate. The current size of the Music database is 6 GB, and this database has been growing at a rate of 1 percent per month for the past year. At present, there is no failover server in place. Peak activity for the database server occurs between 18:00 and 21:00 local time. Dur ing these times, collected baselines in the past month from System Monitor reveal the averages shown in Table 1-14 for various counters.
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Table 1-14 Performance Baselines for DBSRV1
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Object: Counter Processor: % Processor Time Memory: Pages/sec Physical Disk: % Disk Time Physical Disk: Avg. Disk Queue Length
Average Reading 60% 25 35% 5
Business Requirements
General Requirements
Tom McMartin has requested that any replacement database server run SQL Server 2005 on Windows Server 2003. The proposed solution should also include a failover server in case the primary server goes down.
Performance
The proposed solution must allow customers to log in with less than a five-second delay for at least the next four years. There should also be minimal downtime in case the server should fail.
Technical Requirements
Availability
The replacement server must be able to support failover clustering. In addition, SQL Server 2005 on the new system must be able to use more than 4 GB of memory.
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Questions
1. Which of the following subsystems is the most likely cause of the long response times during hours of peak usage A. Processor B. Memory C. Disk D. Network 2. Which of the following is the best way to improve performance on DBSRV1 in the short term A. Including the /3GB switch in the Boot.ini file B. Adding another disk to the RAID 5 array C. Enabling AWE in SQL Server D. Upgrading to SQL Server 2005 3. Which of the following versions of SQL Server 2005 are acceptable options for the replacement database server (Choose all that apply.) A. Standard Edition (32-bit) B. Standard edition (64-bit) C. Developer Edition (32-bit) D. Enterprise Edition (32-bit) 4. Which of the following operating systems are acceptable options for the replace ment database server (Choose all that apply.) A. Windows Server 2003 Standard Edition, 32-bit B. Windows Server 2003 Standard Edition, 64-bit C. Windows Server 2003 Enterprise Edition, 32-bit D. Windows Server 2003 Enterprise Edition, 64-bit
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