On Thu, 9 Oct 2008, Kirk Wolf wrote: <snip> > I would recommend using the following DCB for redirecting tar output > to optimize the I/O, since "todsn" uses QSAM to write records, > and the following would perform better: > > //TAROUT DD DSN=TAR.OUT, > // RECFM=U,BLKSIZE=27998,DSORG=PS, > // UNIT=(SYSDA,10), > // SPACE=(CYL,(200,10)) >
WOW! Did that ever make a difference. Using FB took 45.82 minutes of CPU. Doing the exact same thing with U took only 1.33 minutes of CPU. I was already bypassing the SSH tunnel on the todsn. -- Q: What do theoretical physicists drink beer from? A: Ein Stein. Maranatha! John McKown ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
