Re: Un-attended Large Archives (fwd)
Posted in 1993
> Based on your account of the FIFO working, I'll assume you never get > into multiple volume situations. Indeed, if you can guarantee single > volume archives (make your TAPESIZE parameter bigger that the total > amount of data that could be contained in the archive), this probably > could work. And, of course, this is what we do. We set the BLOCKSIZE to smaller than the buffer size on a pipe, and then set the TAPESIZE parameter to an effective infinity. We arrange for the program sucking on the pipe to buffer during tape changes. Informix never sees an end-of-media indication. In fact, the whole purpose of this subtrafuge is to keep Informix from seeing end-of-media, to avoid the global lock imposed during the media change period. -crl -- Chad R. Larson "I read the news today, oh boy!" -- John Lennon (602) 870-3330 ...!attmail!anasaz!chad chad@anasazi.com chad@anasaz.UUCP Anasazi, Inc. - 7500 North Dreamy Draw Drive, Suite 120, Phoenix, Az 85020