Re: Falling back from 7.23 to 7.14

At 02:10 PM 3/2/98 , David Williams wrote: >In article <6dermh$fgg@freepress.anasazi.com>, Malcolm McNeill ><mcneill@ds9.anasazi.com> writes >>If anyone out there has performed a migration from Informix 7.14 to 7.23 >>and had to fall back, I would like to discuss any problems that you might >>have encountered. I am particularly interested in finding out just what >>structural changes happen to the sysmaster database during a migration and >>whether falling back is a simple matter of pointing the instance back to >>the 7.14 environment. >> >>The reason we are considering falling back to 7.14 is, we have found >>resource use to be somewhat greater with 7.23. We are in the process >>of tuning kernel parameters where we can, however until we have sufficient >>resources to handle the new load, we are proceding with caution. There are >>several instances of informix that we will be migrating and at any time >>we may need to fall back from a 7.23 version to a 7.14. >> > > I would > > a) Take a level 0 archive under 7.14 > b) Install 7.23 in a new $INFORMIXDIR. > > If you need to go back to 7.14 just > > a) shutdown 7.23 > b) point $INFORMIXDIR back ti 7.14 > c) restore the level 0 archive. > > Simple! > > There is an onmode option to revert back but it only goes back > to 6.0!! Please refer to the Migration guide, chapter 7 "Reverting to earlier versions of Online Dynamic Server". There you will see that from 7.2 you can revert to: 7.10.UD1 7.10 6.0 5.0 4.1 Jon ----------------------------------------------------------------------- Jon C. Vemo jon@etcscan.com Database Administration Deluxe Payment Protection Systems/SCAN Bothell, WA (425) 489-1120 -----------------------------------------------------------------------