[ Pobierz całość w formacie PDF ]
.Although DNS lookups can be useful for administrators when looking atlogs, they can adversely affect performance.If you turn off DNS lookups, hostname restrictions will not work andx hostnames will not appear in your log files.Instead, you will see IPaddresses.8-36IG 8-74 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesConfiguring MaximumSimultaneous Requests (continued)Continue discussingmaximum simultaneousrequests.s Demonstrate how toconfigure MaximumSimultaneous Requests.Disabling Domain Name SystemLookupsDiscuss enabling DNSlookups.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-75If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideTo disable DNS lookups, do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.Under Enable DNS, click No.4.Click OK.5.Click Save and Apply.6.When prompted that the changes have been saved and applied, clickOK.You can also specify whether to cache the DNS entries.If you enablethe DNS cache, the server can store hostname information afterreceiving it.If the server needs information about the client in the future,the information is cached and available without further querying.You can specify the size of the DNS cache and an expiration time forDNS cache entries.The DNS cache can contain from 32 to 32768entries; the default value is 1024 entries.Values for expiration time canrange from 1 second to 1 year (specified in seconds); the default value is1200 seconds (20 minutes).Configuring Listen-Queue SizeThe listen-queue size is a socket-level parameter that specifies thenumber of incoming connections the system will accept for that socket.The default setting is 100 incoming connections.If you manage a heavily used Web site, you should make sure yoursystem s listen-queue size is large enough to accommodate thelisten-queue size setting from the Server Manager form.If you change the listen-queue size, make sure your system supports thenew size.You can use the listen-queue size in the Server Manager formto change the listen-queue size requested by the server.If the server requests a listen-queue size larger than the system smaximum listen-queue size, the size defaults to the system s maximum.Setting the listen-queue size too high can degrade server performance.The listen-queue size was designed to prevent the server frombecoming overloaded with connections it cannot handle.If your server isoverloaded and you increase the listen-queue size, the server will onlyfall further behind.8-37IG 8-76 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesDisabling Domain Name SystemLookups (continued)Continue discussing DNSlookups.Configuring Listen-Queue SizeNormally, the network administrator should not changeDiscuss configuringthe listen-queue size.The default setting is sufficient inlisten-queue size.most cases.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-77If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideTo configure the Listen-Queue Size, do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.In the Listen Queue Size field, type the appropriate value.4.Click OK.5.Click Save and Apply.6.When prompted that the changes have been saved and applied, clickOK.Configuring the HTTP Persistent Connection TimeoutWith HTTP 1.1, a connection can be set to be persistent.However, evenif a connection is persistent, it still needs to have a timeout setting;otherwise, it might consume system resources.If you need to change the HTTP persistent connection timeout setting,do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.In the HTTP Persistent Connection Timeout field, type a number inseconds.4.Click OK.5.Click Save and Apply.6.When a dialog box appears stating that the changes have been savedand applied, click OK.8-38IG 8-78 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesConfiguring Listen-Queue Size(continued)Normally, the network administrator should not changeDiscuss configuringthe listen-queue size.The default setting is sufficient inlisten-queue size.most cases.Configuring the HTTP PersistentConnection TimeoutNormally, the network administrator should not changeDiscuss configuring HTTPthe persistent connection timeout.The default setting ispersistent connectionsufficient in most cases.timeout.s Demonstrate how toconfigure HTTP persistentconnection timeout.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-79If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideSetting the Maximum PacketReceive BuffersWhen you are tuning the FastTrack Server, you also need to considerthe following:Maximum Physical Receive Packet SizeMaximum Packet Receive BuffersSetting the Maximum Physical Receive Packet SizeYou can increase or decrease the Maximum Physical Receive PacketSize parameter to match the largest client packet size in use on thenetwork.The network board driver should specify the maximum packetsize it can handle.This parameter cannot be modified at the console prompt; you mustinclude the parameter in the STARTUP.NCF file.Ideally, you should use the largest possible packet size unless the clientand server are configured for different packet sizes or if the packet mustcross a router to get to the server.Topology Default Maximum Packet SizeToken Ring (16 Mbps) 4202Token Ring (4 Mbps) 4202Ethernet 1514Table 8-2: Default Maximum Packet Sizes by TopologyTo set the Maximum Physical Receive Packet Size, complete thefollowing steps:1.At the NetWare server console, enter MONITOR.2.Select Server Parameters.3.Select Communications.4.Select Maximum Physical Receive Packet Size.5.Enter the packet size for your network.6.Press Esc twice.7.Exit MONITOR.8.Restart the NetWare server.8-39IG 8-80 This document should only be used by a Novell-certified instructor.Revision 1 [ Pobierz całość w formacie PDF ]
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.Although DNS lookups can be useful for administrators when looking atlogs, they can adversely affect performance.If you turn off DNS lookups, hostname restrictions will not work andx hostnames will not appear in your log files.Instead, you will see IPaddresses.8-36IG 8-74 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesConfiguring MaximumSimultaneous Requests (continued)Continue discussingmaximum simultaneousrequests.s Demonstrate how toconfigure MaximumSimultaneous Requests.Disabling Domain Name SystemLookupsDiscuss enabling DNSlookups.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-75If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideTo disable DNS lookups, do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.Under Enable DNS, click No.4.Click OK.5.Click Save and Apply.6.When prompted that the changes have been saved and applied, clickOK.You can also specify whether to cache the DNS entries.If you enablethe DNS cache, the server can store hostname information afterreceiving it.If the server needs information about the client in the future,the information is cached and available without further querying.You can specify the size of the DNS cache and an expiration time forDNS cache entries.The DNS cache can contain from 32 to 32768entries; the default value is 1024 entries.Values for expiration time canrange from 1 second to 1 year (specified in seconds); the default value is1200 seconds (20 minutes).Configuring Listen-Queue SizeThe listen-queue size is a socket-level parameter that specifies thenumber of incoming connections the system will accept for that socket.The default setting is 100 incoming connections.If you manage a heavily used Web site, you should make sure yoursystem s listen-queue size is large enough to accommodate thelisten-queue size setting from the Server Manager form.If you change the listen-queue size, make sure your system supports thenew size.You can use the listen-queue size in the Server Manager formto change the listen-queue size requested by the server.If the server requests a listen-queue size larger than the system smaximum listen-queue size, the size defaults to the system s maximum.Setting the listen-queue size too high can degrade server performance.The listen-queue size was designed to prevent the server frombecoming overloaded with connections it cannot handle.If your server isoverloaded and you increase the listen-queue size, the server will onlyfall further behind.8-37IG 8-76 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesDisabling Domain Name SystemLookups (continued)Continue discussing DNSlookups.Configuring Listen-Queue SizeNormally, the network administrator should not changeDiscuss configuringthe listen-queue size.The default setting is sufficient inlisten-queue size.most cases.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-77If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideTo configure the Listen-Queue Size, do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.In the Listen Queue Size field, type the appropriate value.4.Click OK.5.Click Save and Apply.6.When prompted that the changes have been saved and applied, clickOK.Configuring the HTTP Persistent Connection TimeoutWith HTTP 1.1, a connection can be set to be persistent.However, evenif a connection is persistent, it still needs to have a timeout setting;otherwise, it might consume system resources.If you need to change the HTTP persistent connection timeout setting,do the following:1.In Server Manager, click Server Preferences.2.Click Performance Tuning.3.In the HTTP Persistent Connection Timeout field, type a number inseconds.4.Click OK.5.Click Save and Apply.6.When a dialog box appears stating that the changes have been savedand applied, click OK.8-38IG 8-78 This document should only be used by a Novell-certified instructor.Revision 1.0If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101. Installing a Web Server and an FTP ServerPresentation NotesConfiguring Listen-Queue Size(continued)Normally, the network administrator should not changeDiscuss configuringthe listen-queue size.The default setting is sufficient inlisten-queue size.most cases.Configuring the HTTP PersistentConnection TimeoutNormally, the network administrator should not changeDiscuss configuring HTTPthe persistent connection timeout.The default setting ispersistent connectionsufficient in most cases.timeout.s Demonstrate how toconfigure HTTP persistentconnection timeout.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-79If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP Servers NetWare 5 Advanced Administration Instructor GuideSetting the Maximum PacketReceive BuffersWhen you are tuning the FastTrack Server, you also need to considerthe following:Maximum Physical Receive Packet SizeMaximum Packet Receive BuffersSetting the Maximum Physical Receive Packet SizeYou can increase or decrease the Maximum Physical Receive PacketSize parameter to match the largest client packet size in use on thenetwork.The network board driver should specify the maximum packetsize it can handle.This parameter cannot be modified at the console prompt; you mustinclude the parameter in the STARTUP.NCF file.Ideally, you should use the largest possible packet size unless the clientand server are configured for different packet sizes or if the packet mustcross a router to get to the server.Topology Default Maximum Packet SizeToken Ring (16 Mbps) 4202Token Ring (4 Mbps) 4202Ethernet 1514Table 8-2: Default Maximum Packet Sizes by TopologyTo set the Maximum Physical Receive Packet Size, complete thefollowing steps:1.At the NetWare server console, enter MONITOR.2.Select Server Parameters.3.Select Communications.4.Select Maximum Physical Receive Packet Size.5.Enter the packet size for your network.6.Press Esc twice.7.Exit MONITOR.8.Restart the NetWare server.8-39IG 8-80 This document should only be used by a Novell-certified instructor.Revision 1 [ Pobierz całość w formacie PDF ]