Re: AIX disk mirroring versus specifying separate physical disks

"George Harding" <george_at_onest.demon.co.uk> wrote:

>It is usual to mirror control files, redo logs by specifying the name of
>the mirrored files on a file system which maps to a separate physical disk.
>However, under AIX it is possible to automatically mirror a disk.
>
>If AIX disk mirroring is used does this avoid the need for mirroring the
>files via the standard methods using ORACLE?
>
>If you have practical experience of applying AIX disk mirroring to an
>ORACLE database please advise on advantages / drawbacks especially about
>the implications for recovery.
>

Hi I tend to use AIX mirroring on the grounds that I can create them as part of the initial creation of the Logical Volumes (we also put the control files onto raw-disk). The main reason for this aproach is that only the System Administrators really know in what drawers and on what power circuits the disks are located, thus they are best off for ensuring that we have sufficient redundancy, whilst the DBA's spend most of their time asking for more disk space

DaveClakre Received on Sat Oct 18 1997 - 00:00:00 CDT