Re: Aix Mirroring Vs Informix Mirroring

> In general, operating system level mirroring and hardware mirroring are > more efficient than Informix mirroring, if only because they can schedule > writes to both the primary and the mirror disk concurrently, whereas > Informix has to write to the primary and then write to the mirror. > > When you don't have lower level mirroring, use Informix mirroring, but use > a lower level mirroring system if you have a choice. These rules apply to > version 4 or 5 -- they may need to be reconsidered with version 6, though I > doubt it. > > Yours, > Jonathan Leffler (johnl@obelix.informix.com) #include <disclaimer.h> > 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? -- - eko __ | | | | ___________________________________________________________ | \\ | | | \\ | Ellen K. Osinski | | | | Hewlett-Packard | \\ \\ | Disk Memory Division - Information Systems | / \\ | 11413 Chinden Blvd | | ---/\\ | Boise, ID 83714-1023 | | | | | | | | phone : (208) 396-4904 | | * | | e-mail: ellen@hpbs2571.boi.hp.com | | | | telnet: 1-396-4904 | |___________| |___________________________________________________________|