Jeremy, I have the protocol traces but they are about 44MB and 70MB. Is there a way I can send them to you? As for the testing, we are running Windows 2003 advanced server with no service packs. From the 2003 client, we map a drive to the server (Samba or W2003). Then from that drive we have been running the IO-zone basic suite of tests. Running (from the command line in the mapped drive, I.e. Y:\...) "iozone -s 16m -i 0 -A -R -f report.txt" should show normal results and "iozone -s 32m -i 0 -A -R -f report2.txt" should show the problem.
Here is an example of a full report. File size is the left column, and record size is the top row. Speed is in KB/sec. You can see where the speed drops dramatically at 32MB. Thanks, David "Writer report" "4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384" "64" 75628 78294 77721 78513 74395 "128 " 90751 95369 96809 95184 95865 93212 "256 " 107823 107711 107092 109354 107665 105674 105504 "512 " 114706 115112 115430 115644 114250 110561 112454 112175 "1024 " 115586 118498 119247 118106 118558 117669 117109 115713 113378 "2048 " 117543 117730 119502 118905 120940 117782 120144 118108 118950 118211 "4096 " 119136 117897 121224 120629 121265 120565 120701 118823 119519 119297 119750 "8192 " 119864 120137 121090 120940 121612 120158 120953 119481 118914 119388 120234 120022 "16384 " 119758 120410 121239 121283 121382 121003 121197 49943 120290 120309 71590 120519 120383 "32768 " 8815 8517 8410 8390 7580 7907 7489 7784 8075 7372 7526 7374 8710 "65536 " 5923 6028 6118 6053 6147 6109 6125 6161 6061 6040 6118 6182 6058 "131072 " 5355 5320 5329 5324 5337 5340 5305 5316 5295 5328 5316 5358 5121 "262144 " 5000 5008 5010 5022 5010 5015 5032 5016 5006 5002 5010 5016 5025 "524288 " 4855 4868 4777 4857 4869 4842 4842 4865 4869 4836 4864 4864 4852 -----Original Message----- From: Jeremy Allison [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 25, 2004 8:03 PM To: Krause, David Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [Samba] Samba 3 write performance drop on files > 16 MB On Mon, May 24, 2004 at 11:56:11AM -0400, [EMAIL PROTECTED] wrote: > I tried W2K3 to W2K3 server, still on same hardware. It does not get as > high of performance initially, but it also does not drop off after 16MB. > It stayed at about 25 to 30,000KB/sec. Ok, I'd really like to see some protocol traces of it going fast (to w2k3) and slow (to samba). These might be quite large, or can you tell me *exactly* how to reproduce this on a system here ? I'd need W2k3 SP level, file size and exaclty what client operations you do to reproduce it (ie. is it a mapped drive or unc pathname, do you use a command line copy or explorer etc.). Thanks, Jeremy. -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba