NARESH NADIGOTI

@Simon. Thank you. I will try this solution.

@Vincent Thank you. I will try this solution. I have 8 data files having a size of 750MB in total, which are need to be memory mapped. I do indexed_open/indexed_read operations on these files. These file does not modified frequently.

@Simon, Can I deliver this modified VBISAM code to my client? If yes , how? I am not aware of the licensing policies of the VBISAM. Can you please help me on this.

@Simon, Can I deliver this modified VBISAM code to my client? If yes , how? I am not aware of the licensing policies of the VBISAM. Can you please help on this.

Hi Simon, Yes, I have made change to open the file(ivbopen()) in READ ONLY and commented fcntl locks(in vblowlevel.c->ivblock()). It worked fine and gave 8% improvement when 10 processes ran in parallel. Thanks and Regards, Naresh

Hi Simon, Yes, I have made change to open the file(ivbopen()) in READ ONLY and commented fcntl locks(in vblowlevel.c->ivblock()). It worked fine and gave 8% improvement when 10 processes ran in parallel.

Hi Mickey, Memory mapping of the data files.

Hi Mickey, Memory manpping of the data files.