>From Barry Merrill: " Writing an SMF record is an SVC call to the SMF address space, with no physical I/O that has to be managed. Writing to GTF requires the DB2 Address Space to have to manage each of those tiny chunk writes. I can see no way in which the overhead to write to GTF would not be significantly more than sending the records to SMF. But this is an option based on the way I think it works, and is not based on actual measurements. "
Actually I do have a question about this that maybe someone from IBM can answer: Does the I/O to GTF tapes happen in DB2 or in GTF? How does the data get from DB2 to the GTF tape? Is Barry correct that the overhead would be higher to write to GTF vs SMF? Thanks, Jon Jon L. Veilleux [EMAIL PROTECTED] (860) 636-2683 ----------------------------------------- This e-mail may contain confidential or privileged information. If you think you have received this e-mail in error, please advise the sender by reply e-mail and then delete this e-mail immediately. Thank you. Aetna ---------------------------------------------------------------------- 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
