RE: AIX and Informix

If memory serves me correctly IBM does write some of the LV data in the first 512 bytes of the volume. Now that data is accessed very rawly and is written when you issue some system commands which manages the LVs. I am not sure which commands. I think when you fail/fall over using HACMP it will rebuild the data in the first 512 bytes of the LV. This ends up overwriting your informix data if you don't offset it. I have always used an offset of the LV in AIX. Here is a small document which kind of covers this. http://www.iiug.org/forums/ids/index.cgi/noframes/read/4433 You may find more info out on the web. Hope this points you in the correct direction. David -----Original Message----- From: informix-list-bounces@iiug.org [mailto:informix-list-bounces@iiug.org] On Behalf Of tomcaml@yahoo.com Sent: Friday, October 20, 2006 10:47 AM To: informix-list@iiug.org Subject: Re: AIX and Informix Doug yes - Fishy like fresh from the sea Tom Doug Conrey wrote: > This sounds fishy to me. We have plenty of dbspaces with an offset of 0 > (on 5.2 and 5.3), and have never had any problems with > adding/dropping/using them. > > DC > > > -----Original Message----- > > From: informix-list-bounces@iiug.org [mailto:informix-list- > > bounces@iiug.org] On Behalf Of tomcaml@yahoo.com > > Sent: Friday, October 20, 2006 9:22 AM > > To: informix-list@iiug.org > > Subject: Re: AIX and Informix > > > > Thanks for the comments. > > We are running into several things. > > > > One is that we set the offset of the dbspace to 0. We are being told > it > > needs to have an offset of "something" - that AIX wants this for the > > volume group management. Our current environ is HP which we have > always > > used an offset of 0 - it has never been an issue. We have our > physical, > > log and root spaces mirrored and there looks to be some kind of > > corruption, according to support. Kinda wondering if the HACMP > > clustering might be involved also but unsure. > > What we are seeing is this: I dropped a large database and when I went > > to check out the spaces using onstat -d pertaining to the space the DB > > used to be in, the % used was a negative number. So the total size > free > > is greater than the total size allocated. > > > > Tom > > > > > > Obnoxio The Clown wrote: > > > tomcaml@yahoo.com said: > > > > Hello > > > > > > > > We are running into some major walls trying to configure and use > AIX > > > > 5.3 and Informix v10 with HACMP clustering and Informix HDR. AIX > looks > > > > to be very behind the times, as does the clustering piece. This is > for > > > > an intended migration of the main "cash cow" application. Does > anyone > > > > run their "important stuff" on AIX ? I have been researching and > most > > > > of what I see is people using AIX from years back or they only use > AIX > > > > for smaller apps that they don't have great concerns being down. > > > > Comments, Suggestions, Rants or Raves? > > > > > > Personally, I think AIX tin is very good. I can't comment on HACMP, > > other > > > than that I've never met anyone who used ANY clustering software > (HACMP, > > > Sun, Veritas, Compaq) who didn't prefer HDR. > > > > > > -- > > > Bye now, > > > Obnoxio > > > > > > "... no bill is required as no value was provided." > > > -- Christine Normile > > > > > > -- > > > This message has been scanned for viruses and > > > dangerous content by OpenProtect(http://www.openprotect.com), and is > > > believed to be clean. > > > > _______________________________________________ > > Informix-list mailing list > > Informix-list@iiug.org > > http://www.iiug.org/mailman/listinfo/informix-list _______________________________________________ Informix-list mailing list Informix-list@iiug.org http://www.iiug.org/mailman/listinfo/informix-list