Re: Informix Online DS on HP9000 with LVM?

I would suggest that you set up a test system, as close as possible to your real system, and do some benchmarking yourself. There is also an good book put out by Informix called 'Informix Database Administrator's Survival Guide'. This book briefly explains what it feels are the questions you have to ask yourself before you decide what type of RAID/Mirror/Strip system you use. Where the Informix manuals spell out the what's, this book responds with the why's and how's. I have found a lot of useful information, and I am only up to page 70. Even after attending Informix's own DB admin classes :-) the book is put out by INFOMIX Press and published by Prentice Hall PTR. It is written by Joe Lumbley. ISBN 0-13-124314-4 ---------------------------------------------------------------------------- In article <wrzqdvvfs8.fsf@tglobe1.tollpost.no>, ogj@tglobe1.tollpost.no ('yvind Gjerstad) wrote: > >Earlier this year there was some discussion in comp.databases.informix >on whether one should use Informix's own mirroring or use the >mirroring provided with LVM and mirror/UX on HP9000 series 800 >(and in the 700 series with HP-UX 10.0). > >We were adviced to not use LVM at all with Informix 5.02. Now were >planning upgrade to 7.10, and would like to know some hard facts. > >If you use LVM, do you also stripe the disks in LVM and just make >one big chunk on Online? Then make a lot of AIO vp's to keep the LVM >busy? No fragmenting on Online? > >I realize that the answer for the last questions depends on a lot of >things, but whether or not to use LVM at all must be a nobrainer? :-) > >Thanks in advance,