Re: 5.0 Archiving to disk > 2G
In article <4rbeac$b33@cssun.mathcs.emory.edu>, Ed Gulczynski <ecg00@hplvesv2.lvld.hp.com> wrote: >We have 4GIG dbspace instance of INFORMIX (5.07) that we want to archive to >disk instead of tape. We can still backup to tape (8mm) but want unattended >backups that can get stored with normal daily UX file backups. > >Has anyone done this 1) successfully 2) unattended > >We hit the wall at 2G because of the system max file size parameter >(HP870/200 running UX9.04.) > > >-- >Ed Gulczynski, (303) 679-2767, Mountain Region > Information Technology Department, MS BU218 >egul@lvld.hp.com Loveland Manufacturing Center > Hewlett-Packard Company > P. O. Box 301 > Loveland, CO 80539-0301 Here is the scoop on what Ztools can do for you on this type of problem: Ztools has two features that work around the 2GB limit that many computer systems have: 1) Ztools can compress the archive data "on the fly". Typical compression rates vary depending on the data but it is not unusual to see 60-80% compression. 2) Ztools has the capability of splitting an archive to multiple devices. For example, take the following command: zarch -ARCHIVE -gzip /usr1/backup.gz /usr2/backup.gz /usr3/backup.gz In this example, zarch (one of 15 ztools) will compress the backup data on the fly and split the backup to the 3 specified files in a round robin fashion. Since the data is dispatched at the block level in a round robin fasion, performance improvements can be gained by using this method. ANOTHER PERFORMANCE NOTE: Many users have seen increased performance by using either the -compress or -gzip (depending on what type of compression you desire). This occurs when I/O is the bottleneck and there are extra CPU cycles to spare. I try to resist putting commercials here in C.D.I. but in this case, the question sounds like the exact type of problem our tools try to solve. Our WEB page http:www.ztools.com has full descriptions (even the online manuals). For more information on zarch and other Ztools, contact us: -- Greg Wilson Technology Investments, Inc. http://www.ztools.com Email: ztools@ztools.com Phone: (813)933-2477