Re: Aix Mirroring Vs Informix Mirroring

At my site, we are using hardware mirroring for HP workstations. It also works transparently. Ellen K. Osinski (ellen@hpbs2571.boi.hp.com) wrote: : > 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 | : |___________| |___________________________________________________________|