How to set up After Imaging?

T

tgvoelker

New Member
Hello everyone,

We have a real problem with backing up our Progress databases - System is very slow when we do.

Recently I heard about After Images and I think this could solve our Problems. AFAIK it's a kind of differential backup which must be applied together with the last full backup in order to restore. (In fact transactions are stored in the after image.)

Is the way I understood this technology the way it is in reality?
Are there any points I have to consider when I want to use this feature?
Are there common problems when using this feature for backup?
Are there common problems when restoring data using an After Imageß
How can it be implemented?
May I try myself to implement or rather let it do an external specialist?

I am very common with databases and IT but indeed only a bit with progress.

Thomas
 
Hi tgvoelker,

I would strongly suggest to use After imaging!. Without afterimage the database cannot be restored unitl the latest backup you've made.

All the changes in the database are also stored in the afterimage files.

Things to consider are:
  • Use same ai blocksize as bi blocksize for after image.
  • Put after image on different disk then the database.
  • If you have Enterpise db then start aiw (and also biw if you haven't started it yet).
See also KB P103761: http://tinyurl.com/pojvn
KB P7394: http://tinyurl.com/f8b9f

HTH,

Casper.
 
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