Radoslaw, What is the IO rate for the drive in RMF? Is the average connect time different for IEBDG and ICEGENER?
Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of R.S. > Sent: Tuesday, 6 February 2007 1:47 AM > To: [email protected] > Subject: SIO in SDSF vs read/write speed > > I made the following observation: > 1. WRITE. I put some data to tape (3592J). The average transfer speed was > approx. 70MB/s. SDSF shows very high SIO rate for the job, approx. 2500. > Data generated by IEBDG, blocksize=32720, RECFM=FB, LRECL=80 > 2. READ. I read *the same* data, which I previously wrote. Got even > higher transfer speeds, approx. 100MB/s,but significantly lower SIO rate, > approx. 40 > Dataset (FB 80 32720) read by ICEGENER. > > I think, ICEGENER reads the data in much larger chunks, so the number of > I/O is lower, but the speeds is even greater. > Am I right ? > > -- > Radoslaw Skorupka > Lodz, Poland > ---------------------------------------------------------------------- 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
