Re: Aix Mirroring Vs Informix Mirroring

Tim Cargile writes: } >>Ellen K. Osinski (ellen@hpbs2571.boi.hp.com) wrote: } } >>: I can put in a plug for Informix mirroring. We have implemented mirroring } >>: on an HP9000/750. We had the primary go down due to repeated disk write } >>: failures and did not realize it for a day or two. Informix chugged merrily } >>: along quite happliy using the mirror completely transparent to the users. } } >>: Would hardware mirroring provide this transparency? } } GOOD News: her Informix mirroring "chugged merrily along" } } NOT SO GOOD NEWS: "did not realize it for a day or two" } } I think I'd be finding out why the mirror failure was not immediately seen. } } Broken mirrors are bad luck and one wouldn't want to press their luck by having } one (glass or disk) around for any longer than necessary. } If it's important enough to mirror than it's probably important enough to } keep mirrored. } } One could probably make a case for a daemon that "greps" for particularly } important Online log messages and ensures that they are seen as soon and } as often as necessary. Jeesh some people are never satisfied! } Yes, we were a little miffed that we weren't notified that the chunk was down. But appropriate messages were being written to the log. We have since modified DBAmon to check the status of chunks and notify us of problems. j. _____________________________________________________________________________ Jack Parker - Contractor | Hewlett Packard, BSMC Boise, Idaho, USA| If you keep staring at it like that, jparker@hpbs2561.boi.hp.com | your nose is going to grow (208) 396-5388 (W) (208) 384-1623 (H) | into the bark. _____________________________________________________________________________