Novell Netware 5 Advanced Admin Instructor guide

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.Installing a Web Server and an FTP ServerPresentation NotesSetting the Maximum PacketReceive BuffersDiscuss the parameterspresented on the studentpage.Setting the Maximum PhysicalReceive Packet SizeDiscuss the effect of theMaximum Physical ReceivePacket Size on Web serverperformance.s (Optional) Demonstratehow to set the MaximumPhysical Receive PacketSize.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-81If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP ServersNetWare 5 Advanced Administration Instructor GuideSetting the Maximum Packet Receive BuffersThe Maximum Packet Receive Buffers parameter determines themaximum amount of memory allocated to receive incoming packets.Thedefault is 100 for a NetWare server.The Maximum Packet Receive Buffers parameter can be set to anyvalue between 50 and 4,294,967,295.The Maximum Packet Receive Buffers value can be increased toaccommodate a greater number of HTTP requests to the FastTrackServer.However, you should not change this value without firstassessing how much server memory is being used by other serverprocesses.To calculate memory requirements, do the following:1.Multiply the maximum physical receive packet size by the currentmaximum packet receive buffers.The answer equals A.2.Multiply the maximum physical receive packet size by the desiredmaximum packet receive buffers.The answer equals B.3.Subtract A from B to determine the memory requirement for thechange.Using MONITOR, check the available memory on your NetWare server.Adjust the Maximum Packet Receive Buffers setting only if you haveenough memory available.To set the Maximum Packet Receive Buffers parameter, complete thefollowing steps:1.At the server console, enterMONITOR2.Select Server Parameters.3.Select Communications.4.Select Maximum Packet Receive Buffers.5.Enter the number you calculated for this parameter.6.Press Esc twice.7.Exit MONITOR.8.Restart the server.8-40IG 8-82 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 NotesSetting the Maximum PacketReceive BuffersDiscuss setting theMaximum Packet Receivebuffers.Discuss the importanceof calculating memoryrequirements beforechanging the MaximumPacket Receive Buffersvalue.s (Optional) Demonstrate howto set Maximum PacketReceive Buffers.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-83If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP ServersNetWare 5 Advanced Administration Instructor GuideRegulating Web ServerContentWeb server performance can be affected by file sizes and by HTMLfeatures, such as scripts and imagemaps, that require serverprocessing.You must understand how these issues affect server performance andmust determine guidelines for Web server users.File SizesYou can set guidelines that limit the size and number of files that usersstore on the server.The larger the file s size, the longer the file transfer will take.Text files aregenerally small, often less than 40 KB.Graphics cover a large sizerange, often ranging from 2 KB to 600 KB.Audio clips vary in size, depending on file length, resolution, samplingrate, and compression rate.A stereo, one-minute audio clip with CD-quality sampling is about10 MB.Simple sounds, rather than complex music, might be as smallas 10 KB.Video clips can also vary greatly in size, from 100 or 200 KB to as muchas 20 MB.Each HTTP request uses a new thread.Large files tie up a thread forquite some time.If all your users store large audio and video clips on theFastTrack Server, some clients attempting to access your server mighthave packets dropped and be forced to attempt another connection tothe server.HTML FeaturesHTML features that require server processing, such as CGI scripts andimagemaps, can also affect FastTrack Server performance.You should set guidelines for Web server users regarding HTML file andgraphic file sizes.If you do not limit the number of imagemaps and scripts on a Webserver, you might find that they adversely affect server performance byslowing server response time or by causing client packets to bedropped.8-41IG 8-84 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 NotesRegulating Web Server ContentDiscuss the effect ofWeb server content onperformance.Most Web server administrators do not restrict user fileDiscuss file size restrictions.sizes.However, many administrators place restrictionson the size of audio or video clips.Scripts can retrieve data, perform operations, and createDescribe HTML features.HTML documents.CGI scripts can be accessed with HTML forms.Whendata is input into an HTML form, the script communicateswith a Web server by issuing a GET or POST function.Each time a form is submitted, the server must processthe request.Revision 1.0 This document should only be used by a Novell-certified instructor.IG 8-85If you think this document was pirated, call 1-800-PIRATES or 1-801-861-7101.Web Servers andFTP ServersNetWare 5 Advanced Administration Instructor GuideOverview of Novell FTPServices for NetWareThis subsection discusses FTP servers and Novell FTP Services forNetWare.Understanding FTP ServersThe File Transfer Protocol (FTP) is a part of the TCP/IP suite of controlprocedures for transferring files between a remote host computer and alocal computer on a TCP/IP network.FTP includes functions to log in tothe network, list directories, and copy files.An FTP server is an application that provides users with the ability totransfer files to and from the computer on which it is running via the FTPprotocol.An FTP server operates in a client/server relationship.When a clientprogram requests a file, and the FTP server program supplies the file.Likewise, when the client sends a file, the FTP Server receives it.An FTP server uses specified directories in the file system to store allthe files it will send to and receive from clients.The FTP protocol is supported by most Web browsers.FTP transfersare initiated from within a Web browser by entering the URL precededwith ftp:// instead of http://.8-42IG 8-86 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 [ Pobierz całość w formacie PDF ]

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