HI, Yes, I use the SETSOCKOPT to my buffer which kept the STACKed CCW (can be many). I change the the size of the TCP buff SEND and RECEIVE to my buffet size used to transfer CCWS an data to PC. Currently I use 100K for the stack CCWs. Easily I can increase this value and expect maybe more improvement. That is important especially for big block size CCW of course to the DFDSS backup which send about x'fff0' buffers size CCW. That is the only one change I done in MVS, I try to check Windows and Linux TCP behaviour now.
Shai On Thu, Jun 30, 2011 at 3:50 AM, Jim McAlpine <[email protected]> wrote: > On Thu, Jun 30, 2011 at 8:01 AM, shai hess <[email protected]> wrote: > >> HI, >> >> >> This time I change the TCP defaults for socket from my product. >> Until now I did not touch the TCP parameters. I expect the users to >> tune its MF and TCP. >> I used DFDSS to backup 9GB disk with many files. >> I used the MFNetDisk PRO with the stacked CCW feature for both tests. >> I made test before I change the TCP value and after. >> >> Before: >> DFDSS start time 12:00:23 >> DFDSS end time 15:27:41 >> >> After changing the defined and default TCP parameter according to the >> buffer I used to stack the CCW: >> DFDSS start time 10:06:36 >> DFDSS end time 10:50:37 >> >> Small mathematics: >> 207 minutes before. >> 44 minutes after. >> improvement > 81%. Can you believe it? >> >> After more tests I will let you know when you can download the new code. >> >> Thanks, >> Shai >> > Shai, out of interest, could you share the exact TCPIP changes you made. > > Jim McAlpine > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
