Subject RE: [firebird-support] Re: commit after insert is very slow - Email found in subject
Author Leyne, Sean
> svanderclock wrote:
> > not sure that raid will help in database corruption vs shadow ...
> But I can assure you that maintaining a shadow will hurt
> write performance.

I would have said *kill* performance.

The reason is very simple:

- RAID controller manages disk IO at the hardware level

- Software RAID manages disk IO at the OS device driver level.

- Shadows manage disk IO at the application level (even if it database engine, to the OS it is an application).