Re: pyramid 2 gig limit on backup

David Williams (djw@smooth1.demon.co.uk) wrote: : In article <56v3sj$ep6@atglab10.atglab.bls.com>, tolly brumbelow : <tolly.brumbelow@bridge.bst.bls.com> writes : >We run informix backups to a disk dataset on a nightly basis and then : >the disk is copied to tape later. We seem to have ran into a limit on : >the pyramid box that even though our file system is setting on a 4 gig : >disk and the kernel setting for file size is unlimited the backup : >fails when it reaches 2 gig. I was wondering if anyone out there had : >ran into this problem on a pyramid and may know what parameter to tune : >to let us write more than 2 gig into a file a once. : >We are running 6.0 on a Pyramid nile at 1.1-94d079 : >Thanks for your help. : > : > : You can not, Informix only support archive devices up to 2 gigabytes : in size. Most verison of UNIX are 32-bit and so the lseek() system : call used by Informix only supports 2Gb (this is 2 to the power 31 : since 1 bit is reserved to indicate which direction to move i.e. : forward/backward). You will need to either move to Informix 7.21 and : OnBar which MAY help you out or get a 3rd party backup tool. This is not true. Informix supports archive devices up to 2 TERAbytes. lseek is not used by the Informix archive utilities. However, I don't know of any parameter that can be tuned to allow you to write more than 2GB into a file. Generally, when this is a problem, it is because the OS is counting all the data that is written to the device, and overflows when it passes 2GB. However, I didn't think Pyramid was one of those OS'es; I used to have a customer on Pyramid who used 5GB tape devices. I'd suggest calling Pyramid. I believe the call ontape makes (if you're using ontape) is write(). June ---- June Tong Informix Software ---- ---- Senior Consultant (415) 926-6140 ---- ---- International Support junet@informix.com ---- ---- Location-du-jour: Menlo Park ---- * * Standard disclaimers apply * - Please do not send me requests/questions by mail. When I have the knowledge - and time permits, I try to answer questions on comp.databases.informix, but - travel schedule, time, and volume make responding to personal requests - difficult and often slow. Please call your local Informix Technical Support - organization for assistance with technical issues.