Session 8 Tp 8

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Session 8 Tp 8

  1. 1. Session 8 Maintaining Server Availability
  2. 2. Review <ul><li>A cluster is a group of interconnected servers that together function to provide load balancing and fault tolerance </li></ul><ul><li>Windows Server 2003 operating system provides two types of clustering services: </li></ul><ul><ul><li>Server Clusters </li></ul></ul><ul><ul><li>Network Load Balancing Clusters </li></ul></ul><ul><li>Windows Server 2003, Enterprise Edition and Windows Server 2003, Datacenter Edition support up to 8 nodes in a Server cluster </li></ul><ul><li>Windows Server 2003 supports up to 32 nodes in a NLB cluster, in all the editions. </li></ul>
  3. 3. Objectives <ul><li>Monitor Server Performance </li></ul><ul><li>Monitor Network Services </li></ul><ul><li>Monitor System Bottlenecks </li></ul><ul><li>Plan a Backup Strategy </li></ul>
  4. 4. Monitoring Server Performance <ul><li>Monitoring system performance is the important task for maintaining and administering the operating system. </li></ul><ul><li>Windows Server 2003 provides two tools to analyze the server performance: </li></ul><ul><ul><li>Performance Console </li></ul></ul><ul><ul><li>Network Monitor </li></ul></ul>
  5. 5. Performance Console <ul><li>The Performance console provides detailed data about the resources that are used by specific components and programs of the operating system. </li></ul><ul><li>The Performance console consists of two snap-ins: </li></ul><ul><ul><li>System Monitor </li></ul></ul><ul><ul><li>Performance Logs and Alerts </li></ul></ul>
  6. 6. System Monitor <ul><li>Examines the usage of CPU, Memory, Disk Drives, and Network Adapters. </li></ul><ul><li>Performance object is a logical collection of counters that is associated with a resource or service to monitor. </li></ul><ul><li>Counter is a data item that is associated with a performance object </li></ul><ul><li>Performance object instance distinguishes the multiple performance objects of the same type </li></ul>
  7. 7. Performance Logs and Alerts <ul><li>Enables logging and alert notification by configuring triggers on the relevant counters. </li></ul><ul><li>Acts as a service, loaded during system startup and operates even if no users has logged on </li></ul>
  8. 8. Network Monitor <ul><li>Examines the stream of network data transmitted over the traffic </li></ul><ul><li>Captures data that flows to and from the computer running network monitor </li></ul>
  9. 9. Working with Filters <ul><li>Capture filter enables us to specify which packets the program must copy to its buffer. </li></ul><ul><li>Display filter enables us to filter packets that are stored in the buffer </li></ul>
  10. 10. Monitoring DHCP <ul><li>Tracks IP addresses </li></ul><ul><li>Assigns IP addresses to clients for eight days at a time </li></ul><ul><li>DHCP server statistics provides an overview of the information regarding the number of request transmitted, offers, and declines received </li></ul><ul><li>DHCP log file is saved in the %systemroot%system32dhcp location </li></ul>
  11. 11. Monitoring DNS <ul><li>Hosts information that enables client computers to resolve memorable,alphanumeric DNS names to the IP addresses </li></ul><ul><li>Event logs are recorded in the Event Viewer and the debug log entries are stored in the location </li></ul><ul><li>%systemroot%system32dns </li></ul>
  12. 12. Monitoring WINS <ul><li>Uses distributed database that is automatically updated with the names and IP address of computers currently available </li></ul><ul><li>To open the WINS Server Statistical dialog, in the WINS console, right-click the WINS Server icon and select Display Server Statistical option </li></ul>
  13. 13. Monitoring Routing and Remote Access <ul><li>Routing and Remote Access enables routing in the network </li></ul><ul><li>Examines and analyzes the current port usage, routing statistics, number of IP datagrams, as well as statistics for IP, TCP, and ICMP protocols </li></ul>TCP/IP Information RRAS Console
  14. 14. Monitoring System Bottlenecks <ul><li>Tracking the bottleneck that is affecting the performance is a complicated task </li></ul><ul><li>Performance console tracks the bottlenecks and solves the performance problems </li></ul><ul><li>To locate the bottleneck, there are four systems that we need to monitor: </li></ul><ul><ul><li>Processor </li></ul></ul><ul><ul><li>Memory </li></ul></ul><ul><ul><li>Storage Subsystem </li></ul></ul><ul><ul><li>Network. </li></ul></ul>
  15. 15. Processor Subsystem <ul><li>Processor array inadequately configured it results the server to accumulate the incoming client request. </li></ul><ul><li>This prevents the server from processing the request. </li></ul><ul><li>% Processor Time counter is the main indicator of the processor performance. </li></ul>
  16. 16. Memory Subsystem <ul><li>Inadequate amount of memory in a server, prevents the computer from caching data effectively </li></ul><ul><li>This leads the processes to depend on the disks reads more than memory read, thereby slowing down the enter system </li></ul><ul><li>Pages/Sec and Available MBytes counters are used to monitor memory performance </li></ul>
  17. 17. Storage Subsystem <ul><li>Overloaded with Read and Write commands, results in processing the client request at a very slow rate. </li></ul><ul><li>Prime location to find bottlenecks as the server’s hard disk carries greater physical load than the other systems </li></ul><ul><li>% Disk Time counter , enable us to monitor the performance of the storage subsystem. </li></ul>
  18. 18. Network Subsystem <ul><li>The amount of network traffic reaching the server through its network interface restricts the bandwidth of the network connections. </li></ul><ul><li>Current Bandwidth performance object monitors the Network performance. </li></ul>
  19. 19. Network Backup Strategy <ul><li>Panning a backup strategy for a network includes of three components: </li></ul><ul><ul><li>Backup Hardware </li></ul></ul><ul><ul><li>Backup Software </li></ul></ul><ul><ul><li>Backup Plan </li></ul></ul>
  20. 20. Backup Types <ul><li>The backup software provides us with various backup types that enable us to backup only required files and folders. </li></ul><ul><ul><li>Normal - Creates the back up for all the selected files and folders. It will clear all the markers but will not look out for markers. </li></ul></ul><ul><ul><li>Differential - Creates the back up of the selected files and folders having markers. It does not clear the markers. </li></ul></ul><ul><ul><li>Incremental - Creates the back up of the selected files and folders having markers. It clears the markers. </li></ul></ul>
  21. 21. Restoring Tasks <ul><li>The backup software along with providing solutions for backup must provide solutions for restoring data. </li></ul><ul><li>The basics options that must be provided by backup software for restoring data are: </li></ul><ul><ul><li>Original Location </li></ul></ul><ul><ul><li>Alternate Location </li></ul></ul><ul><ul><li>Single Folder </li></ul></ul>
  22. 22. Volume Shadow Copy Service <ul><li>Backs up files that are opened or locked due technical problem of the system </li></ul><ul><li>Stores only the changes for the shares, not the entire share content </li></ul><ul><li>Provides access to previous versions of files that the server had cached in the configured schedule </li></ul>
  23. 23. Summary <ul><li>Windows Server 2003 provides two tools to analyze the server performance: </li></ul><ul><ul><li>Performance Console </li></ul></ul><ul><ul><li>Network Monitor </li></ul></ul><ul><li>The Performance console consists of two snap-ins: </li></ul><ul><ul><li>System Monitor </li></ul></ul><ul><ul><li>Performance Logs and Alerts </li></ul></ul><ul><li>There are three types of counter logs; trace, counter, and alerts. </li></ul><ul><li>Network Monitor is an administrative tool that enables us to examine the stream of network data transmitted over the traffic. </li></ul>
  24. 24. Summary Contd… <ul><li>The two filters provided by the Network monitor are: Capture Filter and Display Filter. </li></ul><ul><li>There are four services that enable us to monitor the network server: DHCP, DNS, WINS, and Routing and Remote Access </li></ul><ul><li>To locate the bottleneck, there are four systems that we ideally need to monitor: Processor, Memory, Storage Subsystem, and Network. </li></ul>
  25. 25. <ul><li>Panning a backup strategy for a network includes of three components; backup hardware, backup software, and backup plan. </li></ul><ul><li>Volume Shadow Copy Service (VSS) in Windows Server 2003 enables us to take back up of files that are opened or locked due technical problem of the system. </li></ul>Summary Contd…

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