Re: Mirroring: Informix or AIX 4.1.5 -Reply

I guess it depends on what you call compelling. If you want to implement PDQ and if you want to be able to make table scans from both ends of the table at once then you need to mirror in Informix. We have used Informix mirroring since Jan 1995. in that time we have lost disks and chunks and the database has just handled it in a most impressive manner. rgds Peter Tashkoff <tashkop@zespri.co.nz> Zespri International Limited This posting may not be used by any party to vilify another. Standard disclaimers apply. >>> Neil Truby <ntruby@netcomuk.co.uk> 16/April/1997 08:43am >>> drew wrote: > > We want to implement mirroring on an RS/6000 J40. Should we let Informix > mirror the drives or AIX 4.1.5? > > We are currently using Informix 7.12 and are writing to a raw partition > through the LVM. Since it is going through the LVM, the OS should > theoretically be able to mirror it. > > The quesiton is: Which is overall faster and or better? > > Drew DeGraff To give an answer in the abstract, let the operating system do it. I've never seen anyone give a compelling reason for using Informix rather than hardware or operating system mirroring. I look forward to being corrected! Neil Truby Chase Manhattan Bank Bournemouth