Slide 1

User Group Meeting Microsoft Read Write Review July 13, 2001 Slide 2 Microsoft Read Write Review We wanted to review the read/write buffer sizes when we mix Windows 98, 2000 and NT together. Slide 3 Setup Notes Network connection 10 Mb/s Half Duplex Ethernet Some charts were scaled down to 100s of milliseconds. Therefore the maximum theoretical throughput would be.125 MB or 1.25 Mb/s. Slide 4 Batch File To Simplify Testing ECHO off CLS ECHO ABOUT TO MAP DRIVE. ECHO START SNIFFER IF YOU WANT TO CAPTURE THIS. ECHO. PAUSE NET USE T: \\10.10.10.12\TEMP cls ECHO. ECHO ABOUT TO COPY THE FILE TO THE NT SERVER ECHO START SNIFFER IF YOU WANT TO CAPTURE THIS. ECHO. PAUSE COPY C:\TEMP\TESTFILE T: cls ECHO. ECHO ABOUT TO COPY THE FILE from THE NT SERVER ECHO START SNIFFER IF YOU WANT TO CAPTURE THIS. ECHO. PAUSE COPY T:testfile c:\temp\testfile.new del c:\temp\testfile.new cls 1 2 3 Test Identifier Slide 5 Batch File To Simplify Testing ECHO. ECHO ABOUT TO DELETE THE FILE ON THE NT SERVER ECHO START SNIFFER IF YOU WANT TO CAPTURE THIS. ECHO. PAUSE DEL T:TESTFILE cls ECHO. ECHO ABOUT TO REMOVE THE DRIVE MAPPING ON THE NT SERVER ECHO START SNIFFER IF YOU WANT TO CAPTURE THIS. ECHO. PAUSE NET USE T: /d PAUSE 4 5 Test Identifier Slide 6 Filename List Test1.cap NT Workstation NT Server Test2.cap NT Workstation NT Server (changed SizReqBuf to 65,535 on Workstation) Test3.cap NT Workstation NT Server (changed SizReqBuf to 65,535 on Server) Test4.cap Win2000 Workstation NT Server Test5.cap Win2000 Workstation NT Server (changed SizReqBuf to 65,535 on Server) Test6.cap - NT Workstation Win2000 Server Test7.cap - Win2000 Workstation WIN2000 Server Test8.cap Win98 Workstation NT Server Test9.cap - Win98 Workstation - WIN2000 Server Test10.cap WinNT Workstation NT Server (changed SizReqBuf to 60,000 on Server) Test11.cap WinNT Workstation NT Server (changed SizReqBuf to 55,000 on Server) Slide 7 Frame Number for Results Step1 Step2 Step3 Step4 Step5 Test10-56-22352236-44564457-44674468-4470 Test21-1516-22762277-44844485-44954496-4498 Test30-1415-23392340-45594560-45704571-4573 Test40-2728-24632481-46984699-4718 Test50-2829-22292230-44454446-2254 Test60-1617-23432344-45594560-45704571-4574 Test70-3940-22382239-44554456-4462 Test80-1920-22732274-44684469-44754476-4480 Test90-2324-22752276-44714472-44784479-4483 Test100-1415-23152316-45344535-4545 Test 110-1415-22482249-44924493-45034504-4506 Slide 8 Number of Commands Reads Write Test16335 Test26335 Test36368 Test442503 Test54234 Test66334 Test74234 Test83434 Test93434 Test106368 Test 116368 Slide 9 Sniffer Notes Same old Bug.. Slide 10 Sniffer Notes Whenever you create a filter and create a print file, the output doesnt match what was in the filtered trace. Slide 11 Work Around Option 1 Just click the Save As. Select OK at the Next dialog screen. When prompted for a file name, Press Esc. Now create your Print File. Slide 12 Work Around Option 2 Select whatever Display Filter Right click and choose Create New Filtered Window. Now create your Print File. Slide 13 Output File Note I found if you drag and drop at least 4 Trace Files from the File Manager into the Sniffer Application and then Create your Print File, the Output is back to the correct format. Sounds nuts, but seems to work for me... so far. Slide 14 How to Quickly Group the Reads and Writes ?? Import the trace file into Excel. Make sure you kept the Summary information as an entire cell. Sort on Summary Information. Select the Summary Column and use the Data- Text to Columns function. Choose the Delimited option and use equals, space and comma as a delimiter, Slide 15 Microsoft Registry Change Locate and click the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentContr olSet\Services\lanmanserver\parameters On the Edit menu, click Add Value, and then add the following registry value: Value Name: SizReqBuf Data Type: DWORD Value Radix: Decimal Value: 65535 Quit Registry Editor. Slide 16 WINDOW Filters Slide 17 TCP WINDOW SIZE FILTER Slide 18 SMB READ FILTER Slide 19 SMB WRITE FILTER Slide 20 WIN NT Server Slide 21 Slide 22 Slide 23 Slide 24 Slide 25 Slide 26 WIN2K Server Charts Slide 27 Slide 28