Home » Archimedes archive » Acorn User » AU 1997-Xmas B.adf » PD » NetPlex/!Netplex/!Help/HTML/a0-perfo
NetPlex/!Netplex/!Help/HTML/a0-perfo
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Acorn User » AU 1997-Xmas B.adf » PD |
| Filename: | NetPlex/!Netplex/!Help/HTML/a0-perfo |
| Read OK: | ✔ |
| File size: | 0902 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
<HTML> <HEAD> <TITLE>Netplex - Performance Issues</TITLE> </HEAD> <BODY TEXT="#000000" BGCOLOR="#ffffff" LINK="#004499" VLINK="#00224c" ALINK="#00cc00"> <H1><IMG SRC="images/world" ALIGN=ABSMIDDLE> Performance Issues</H1> <HR> <P>Netplex allows you to choose how often the server is allowed to become active, how many simultaneous connections are allowed and the amount of file buffer that's allocated. By adjusting these three parameters, you can control how much of your machine's network bandwidth can be used when clients access the server.</P> <P>For example, if you have a 64Kb/sec connection then you could set the <I>Wait</I> field to 50 centiseconds, allow four simultaneous connections and have a 4Kb buffer. This allows a maximum of 32Kb/sec to be used by the server, which is reasonable if you wish to be simultaneously using your machine for network activities.</P> <P>That said, you must note that the throughput that Netplex can achieve is entirely dependent on your machine and network connection, and different settings will have varying effects depending on what machine you have. For example, using a <I>Wait</I> setting of 0 on my ARM 610 machine, is actually <I>slower</I> than a setting of 1. This happens because Netplex tries to serve data too quickly and ends up impeding its own perfomance.</P> <P>It is difficult to give hard and fast rules about what settings will give you in terms of transfer rates - in fact, the best way of checking your settings is to use two locally networked machines and try transferring a large file between the two.</P> <P>General points:</P> <UL> <LI>Don't set the Wait setting to zero - it often throttles the server. <LI>Don't use a file buffer of more than 12Kb - the Internet module uses 12Kb buffers by default and using more than that is unlikely to increase performance. <LI>Use a smaller buffer and a quicker <I>Wait</I> time in preference to a large buffer and slower Wait time. </UL> <HR> <P><CENTER> <A HREF="14-image"><IMG SRC="images/buttons/bak" WIDTH=32 HEIGHT=32 BORDER=0 ALT="[ Previous ]"></A> <A HREF="index"><IMG SRC="images/buttons/up" WIDTH=32 HEIGHT=32 BORDER=0 ALT="[ Index ]"></A> <A HREF="a1-gloss"><IMG SRC="images/buttons/fwd" WIDTH=32 HEIGHT=32 BORDER=0 ALT="[ Next ]"></A> </CENTER></P> </BODY> </HTML>
00000000 3c 48 54 4d 4c 3e 0a 0a 3c 48 45 41 44 3e 0a 3c |<HTML>..<HEAD>.<| 00000010 54 49 54 4c 45 3e 4e 65 74 70 6c 65 78 20 2d 20 |TITLE>Netplex - | 00000020 50 65 72 66 6f 72 6d 61 6e 63 65 20 49 73 73 75 |Performance Issu| 00000030 65 73 3c 2f 54 49 54 4c 45 3e 0a 3c 2f 48 45 41 |es</TITLE>.</HEA| 00000040 44 3e 0a 0a 3c 42 4f 44 59 20 54 45 58 54 3d 22 |D>..<BODY TEXT="| 00000050 23 30 30 30 30 30 30 22 20 42 47 43 4f 4c 4f 52 |#000000" BGCOLOR| 00000060 3d 22 23 66 66 66 66 66 66 22 20 4c 49 4e 4b 3d |="#ffffff" LINK=| 00000070 22 23 30 30 34 34 39 39 22 20 56 4c 49 4e 4b 3d |"#004499" VLINK=| 00000080 22 23 30 30 32 32 34 63 22 20 41 4c 49 4e 4b 3d |"#00224c" ALINK=| 00000090 22 23 30 30 63 63 30 30 22 3e 0a 0a 3c 48 31 3e |"#00cc00">..<H1>| 000000a0 3c 49 4d 47 20 53 52 43 3d 22 69 6d 61 67 65 73 |<IMG SRC="images| 000000b0 2f 77 6f 72 6c 64 22 20 41 4c 49 47 4e 3d 41 42 |/world" ALIGN=AB| 000000c0 53 4d 49 44 44 4c 45 3e 20 20 50 65 72 66 6f 72 |SMIDDLE> Perfor| 000000d0 6d 61 6e 63 65 20 49 73 73 75 65 73 3c 2f 48 31 |mance Issues</H1| 000000e0 3e 0a 3c 48 52 3e 0a 0a 3c 50 3e 4e 65 74 70 6c |>.<HR>..<P>Netpl| 000000f0 65 78 20 61 6c 6c 6f 77 73 20 79 6f 75 20 74 6f |ex allows you to| 00000100 20 63 68 6f 6f 73 65 20 68 6f 77 20 6f 66 74 65 | choose how ofte| 00000110 6e 20 74 68 65 20 73 65 72 76 65 72 20 69 73 20 |n the server is | 00000120 61 6c 6c 6f 77 65 64 20 74 6f 20 62 65 63 6f 6d |allowed to becom| 00000130 65 20 61 63 74 69 76 65 2c 20 68 6f 77 20 6d 61 |e active, how ma| 00000140 6e 79 20 73 69 6d 75 6c 74 61 6e 65 6f 75 73 20 |ny simultaneous | 00000150 63 6f 6e 6e 65 63 74 69 6f 6e 73 20 61 72 65 20 |connections are | 00000160 61 6c 6c 6f 77 65 64 20 61 6e 64 20 74 68 65 20 |allowed and the | 00000170 61 6d 6f 75 6e 74 20 6f 66 20 66 69 6c 65 20 62 |amount of file b| 00000180 75 66 66 65 72 20 74 68 61 74 27 73 20 61 6c 6c |uffer that's all| 00000190 6f 63 61 74 65 64 2e 20 20 42 79 20 61 64 6a 75 |ocated. By adju| 000001a0 73 74 69 6e 67 20 74 68 65 73 65 20 74 68 72 65 |sting these thre| 000001b0 65 20 70 61 72 61 6d 65 74 65 72 73 2c 20 79 6f |e parameters, yo| 000001c0 75 20 63 61 6e 20 63 6f 6e 74 72 6f 6c 20 68 6f |u can control ho| 000001d0 77 20 6d 75 63 68 20 6f 66 20 79 6f 75 72 20 6d |w much of your m| 000001e0 61 63 68 69 6e 65 27 73 20 6e 65 74 77 6f 72 6b |achine's network| 000001f0 20 62 61 6e 64 77 69 64 74 68 20 63 61 6e 20 62 | bandwidth can b| 00000200 65 20 75 73 65 64 20 77 68 65 6e 20 63 6c 69 65 |e used when clie| 00000210 6e 74 73 20 61 63 63 65 73 73 20 74 68 65 20 73 |nts access the s| 00000220 65 72 76 65 72 2e 3c 2f 50 3e 0a 0a 3c 50 3e 46 |erver.</P>..<P>F| 00000230 6f 72 20 65 78 61 6d 70 6c 65 2c 20 69 66 20 79 |or example, if y| 00000240 6f 75 20 68 61 76 65 20 61 20 36 34 4b 62 2f 73 |ou have a 64Kb/s| 00000250 65 63 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 74 68 |ec connection th| 00000260 65 6e 20 79 6f 75 20 63 6f 75 6c 64 20 73 65 74 |en you could set| 00000270 20 74 68 65 20 3c 49 3e 57 61 69 74 3c 2f 49 3e | the <I>Wait</I>| 00000280 20 66 69 65 6c 64 20 74 6f 20 35 30 20 63 65 6e | field to 50 cen| 00000290 74 69 73 65 63 6f 6e 64 73 2c 20 61 6c 6c 6f 77 |tiseconds, allow| 000002a0 20 66 6f 75 72 20 73 69 6d 75 6c 74 61 6e 65 6f | four simultaneo| 000002b0 75 73 20 63 6f 6e 6e 65 63 74 69 6f 6e 73 20 61 |us connections a| 000002c0 6e 64 20 68 61 76 65 20 61 20 34 4b 62 20 62 75 |nd have a 4Kb bu| 000002d0 66 66 65 72 2e 20 20 54 68 69 73 20 61 6c 6c 6f |ffer. This allo| 000002e0 77 73 20 61 20 6d 61 78 69 6d 75 6d 20 6f 66 20 |ws a maximum of | 000002f0 33 32 4b 62 2f 73 65 63 20 74 6f 20 62 65 20 75 |32Kb/sec to be u| 00000300 73 65 64 20 62 79 20 74 68 65 20 73 65 72 76 65 |sed by the serve| 00000310 72 2c 20 77 68 69 63 68 20 69 73 20 72 65 61 73 |r, which is reas| 00000320 6f 6e 61 62 6c 65 20 69 66 20 79 6f 75 20 77 69 |onable if you wi| 00000330 73 68 20 74 6f 20 62 65 20 73 69 6d 75 6c 74 61 |sh to be simulta| 00000340 6e 65 6f 75 73 6c 79 20 75 73 69 6e 67 20 79 6f |neously using yo| 00000350 75 72 20 6d 61 63 68 69 6e 65 20 66 6f 72 20 6e |ur machine for n| 00000360 65 74 77 6f 72 6b 20 61 63 74 69 76 69 74 69 65 |etwork activitie| 00000370 73 2e 3c 2f 50 3e 0a 0a 3c 50 3e 54 68 61 74 20 |s.</P>..<P>That | 00000380 73 61 69 64 2c 20 79 6f 75 20 6d 75 73 74 20 6e |said, you must n| 00000390 6f 74 65 20 74 68 61 74 20 74 68 65 20 74 68 72 |ote that the thr| 000003a0 6f 75 67 68 70 75 74 20 74 68 61 74 20 4e 65 74 |oughput that Net| 000003b0 70 6c 65 78 20 63 61 6e 20 61 63 68 69 65 76 65 |plex can achieve| 000003c0 20 69 73 20 65 6e 74 69 72 65 6c 79 20 64 65 70 | is entirely dep| 000003d0 65 6e 64 65 6e 74 20 6f 6e 20 79 6f 75 72 20 6d |endent on your m| 000003e0 61 63 68 69 6e 65 20 61 6e 64 20 6e 65 74 77 6f |achine and netwo| 000003f0 72 6b 20 63 6f 6e 6e 65 63 74 69 6f 6e 2c 20 61 |rk connection, a| 00000400 6e 64 20 64 69 66 66 65 72 65 6e 74 20 73 65 74 |nd different set| 00000410 74 69 6e 67 73 20 77 69 6c 6c 20 68 61 76 65 20 |tings will have | 00000420 76 61 72 79 69 6e 67 20 65 66 66 65 63 74 73 20 |varying effects | 00000430 64 65 70 65 6e 64 69 6e 67 20 6f 6e 20 77 68 61 |depending on wha| 00000440 74 20 6d 61 63 68 69 6e 65 20 79 6f 75 20 68 61 |t machine you ha| 00000450 76 65 2e 20 20 46 6f 72 20 65 78 61 6d 70 6c 65 |ve. For example| 00000460 2c 20 75 73 69 6e 67 20 61 20 3c 49 3e 57 61 69 |, using a <I>Wai| 00000470 74 3c 2f 49 3e 20 73 65 74 74 69 6e 67 20 6f 66 |t</I> setting of| 00000480 20 30 20 6f 6e 20 6d 79 20 41 52 4d 20 36 31 30 | 0 on my ARM 610| 00000490 20 6d 61 63 68 69 6e 65 2c 20 69 73 20 61 63 74 | machine, is act| 000004a0 75 61 6c 6c 79 20 3c 49 3e 73 6c 6f 77 65 72 3c |ually <I>slower<| 000004b0 2f 49 3e 20 74 68 61 6e 20 61 20 73 65 74 74 69 |/I> than a setti| 000004c0 6e 67 20 6f 66 20 31 2e 20 20 54 68 69 73 20 68 |ng of 1. This h| 000004d0 61 70 70 65 6e 73 20 62 65 63 61 75 73 65 20 4e |appens because N| 000004e0 65 74 70 6c 65 78 20 74 72 69 65 73 20 74 6f 20 |etplex tries to | 000004f0 73 65 72 76 65 20 64 61 74 61 20 74 6f 6f 20 71 |serve data too q| 00000500 75 69 63 6b 6c 79 20 61 6e 64 20 65 6e 64 73 20 |uickly and ends | 00000510 75 70 20 69 6d 70 65 64 69 6e 67 20 69 74 73 20 |up impeding its | 00000520 6f 77 6e 20 70 65 72 66 6f 6d 61 6e 63 65 2e 3c |own perfomance.<| 00000530 2f 50 3e 0a 0a 3c 50 3e 49 74 20 69 73 20 64 69 |/P>..<P>It is di| 00000540 66 66 69 63 75 6c 74 20 74 6f 20 67 69 76 65 20 |fficult to give | 00000550 68 61 72 64 20 61 6e 64 20 66 61 73 74 20 72 75 |hard and fast ru| 00000560 6c 65 73 20 61 62 6f 75 74 20 77 68 61 74 20 73 |les about what s| 00000570 65 74 74 69 6e 67 73 20 77 69 6c 6c 20 67 69 76 |ettings will giv| 00000580 65 20 79 6f 75 20 69 6e 20 74 65 72 6d 73 20 6f |e you in terms o| 00000590 66 20 74 72 61 6e 73 66 65 72 20 72 61 74 65 73 |f transfer rates| 000005a0 20 2d 20 69 6e 20 66 61 63 74 2c 20 74 68 65 20 | - in fact, the | 000005b0 62 65 73 74 20 77 61 79 20 6f 66 20 63 68 65 63 |best way of chec| 000005c0 6b 69 6e 67 20 79 6f 75 72 20 73 65 74 74 69 6e |king your settin| 000005d0 67 73 20 69 73 20 74 6f 20 75 73 65 20 74 77 6f |gs is to use two| 000005e0 20 6c 6f 63 61 6c 6c 79 20 6e 65 74 77 6f 72 6b | locally network| 000005f0 65 64 20 6d 61 63 68 69 6e 65 73 20 61 6e 64 20 |ed machines and | 00000600 74 72 79 20 74 72 61 6e 73 66 65 72 72 69 6e 67 |try transferring| 00000610 20 61 20 6c 61 72 67 65 20 66 69 6c 65 20 62 65 | a large file be| 00000620 74 77 65 65 6e 20 74 68 65 20 74 77 6f 2e 3c 2f |tween the two.</| 00000630 50 3e 0a 0a 3c 50 3e 47 65 6e 65 72 61 6c 20 70 |P>..<P>General p| 00000640 6f 69 6e 74 73 3a 3c 2f 50 3e 0a 3c 55 4c 3e 0a |oints:</P>.<UL>.| 00000650 3c 4c 49 3e 44 6f 6e 27 74 20 73 65 74 20 74 68 |<LI>Don't set th| 00000660 65 20 57 61 69 74 20 73 65 74 74 69 6e 67 20 74 |e Wait setting t| 00000670 6f 20 7a 65 72 6f 20 2d 20 69 74 20 6f 66 74 65 |o zero - it ofte| 00000680 6e 20 74 68 72 6f 74 74 6c 65 73 20 74 68 65 20 |n throttles the | 00000690 73 65 72 76 65 72 2e 0a 3c 4c 49 3e 44 6f 6e 27 |server..<LI>Don'| 000006a0 74 20 75 73 65 20 61 20 66 69 6c 65 20 62 75 66 |t use a file buf| 000006b0 66 65 72 20 6f 66 20 6d 6f 72 65 20 74 68 61 6e |fer of more than| 000006c0 20 31 32 4b 62 20 2d 20 74 68 65 20 49 6e 74 65 | 12Kb - the Inte| 000006d0 72 6e 65 74 20 6d 6f 64 75 6c 65 20 75 73 65 73 |rnet module uses| 000006e0 20 31 32 4b 62 20 62 75 66 66 65 72 73 20 62 79 | 12Kb buffers by| 000006f0 20 64 65 66 61 75 6c 74 20 61 6e 64 20 75 73 69 | default and usi| 00000700 6e 67 20 6d 6f 72 65 20 74 68 61 6e 20 74 68 61 |ng more than tha| 00000710 74 20 69 73 20 75 6e 6c 69 6b 65 6c 79 20 74 6f |t is unlikely to| 00000720 20 69 6e 63 72 65 61 73 65 20 70 65 72 66 6f 72 | increase perfor| 00000730 6d 61 6e 63 65 2e 0a 3c 4c 49 3e 55 73 65 20 61 |mance..<LI>Use a| 00000740 20 73 6d 61 6c 6c 65 72 20 62 75 66 66 65 72 20 | smaller buffer | 00000750 61 6e 64 20 61 20 71 75 69 63 6b 65 72 20 3c 49 |and a quicker <I| 00000760 3e 57 61 69 74 3c 2f 49 3e 20 74 69 6d 65 20 69 |>Wait</I> time i| 00000770 6e 20 70 72 65 66 65 72 65 6e 63 65 20 74 6f 20 |n preference to | 00000780 61 20 6c 61 72 67 65 20 62 75 66 66 65 72 20 61 |a large buffer a| 00000790 6e 64 20 73 6c 6f 77 65 72 20 57 61 69 74 20 74 |nd slower Wait t| 000007a0 69 6d 65 2e 0a 3c 2f 55 4c 3e 0a 0a 3c 48 52 3e |ime..</UL>..<HR>| 000007b0 0a 0a 3c 50 3e 3c 43 45 4e 54 45 52 3e 0a 3c 41 |..<P><CENTER>.<A| 000007c0 20 48 52 45 46 3d 22 31 34 2d 69 6d 61 67 65 22 | HREF="14-image"| 000007d0 3e 3c 49 4d 47 20 53 52 43 3d 22 69 6d 61 67 65 |><IMG SRC="image| 000007e0 73 2f 62 75 74 74 6f 6e 73 2f 62 61 6b 22 20 57 |s/buttons/bak" W| 000007f0 49 44 54 48 3d 33 32 20 48 45 49 47 48 54 3d 33 |IDTH=32 HEIGHT=3| 00000800 32 20 42 4f 52 44 45 52 3d 30 20 41 4c 54 3d 22 |2 BORDER=0 ALT="| 00000810 5b 20 50 72 65 76 69 6f 75 73 20 5d 22 3e 3c 2f |[ Previous ]"></| 00000820 41 3e 0a 3c 41 20 48 52 45 46 3d 22 69 6e 64 65 |A>.<A HREF="inde| 00000830 78 22 3e 3c 49 4d 47 20 53 52 43 3d 22 69 6d 61 |x"><IMG SRC="ima| 00000840 67 65 73 2f 62 75 74 74 6f 6e 73 2f 75 70 22 20 |ges/buttons/up" | 00000850 57 49 44 54 48 3d 33 32 20 48 45 49 47 48 54 3d |WIDTH=32 HEIGHT=| 00000860 33 32 20 42 4f 52 44 45 52 3d 30 20 41 4c 54 3d |32 BORDER=0 ALT=| 00000870 22 5b 20 49 6e 64 65 78 20 5d 22 3e 3c 2f 41 3e |"[ Index ]"></A>| 00000880 0a 3c 41 20 48 52 45 46 3d 22 61 31 2d 67 6c 6f |.<A HREF="a1-glo| 00000890 73 73 22 3e 3c 49 4d 47 20 53 52 43 3d 22 69 6d |ss"><IMG SRC="im| 000008a0 61 67 65 73 2f 62 75 74 74 6f 6e 73 2f 66 77 64 |ages/buttons/fwd| 000008b0 22 20 57 49 44 54 48 3d 33 32 20 48 45 49 47 48 |" WIDTH=32 HEIGH| 000008c0 54 3d 33 32 20 42 4f 52 44 45 52 3d 30 20 41 4c |T=32 BORDER=0 AL| 000008d0 54 3d 22 5b 20 4e 65 78 74 20 5d 22 3e 3c 2f 41 |T="[ Next ]"></A| 000008e0 3e 0a 3c 2f 43 45 4e 54 45 52 3e 3c 2f 50 3e 0a |>.</CENTER></P>.| 000008f0 0a 3c 2f 42 4f 44 59 3e 0a 0a 3c 2f 48 54 4d 4c |.</BODY>..</HTML| 00000900 3e 0a |>.| 00000902
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