How about data striping? <snip> Now, to save CPU, we tried the Unix/Windows solution on z/OS too. The result was: the CPU time was 25 % less, but elapsed time was significantly higher, due to waits on the file I/O - although there was not much file I/O - most of it was reduced by the main storage cache. Anyway: we have to experiment with larger cache sizes, but it appears that the z/OS file I/O is the bottleneck.
We use fseek / ftell / fread to do the file I/O. The files are normal sequential OS files. </snip> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
