On 03/26/2004 11:22:35 AM, "Mercadante, Thomas F" wrote:
> All
> Within Rman, I can : CONFIGURE DEVICE TYPE DISK PARALLELISM 2;
>
> Does anyone know what this does? The docs only mention setting this for
> tape. I am hoping that I can spin up several rman backup processes at once
> to speed up a disk backup.
It turns all of your disks into RAID-5. See www.barf.com for more.
No, just kidding. When you set a parallelism degree, RMAN will write in
two parallel streams, using two processes. That will normally result in
at least two backup pieces. Whether that will improve things, depends
on your disk controller and its ability to do things in parallel. If
you have a simple EIDE controller, with one of those tiny 100+ GB drives,
then doing things in parallel will actually slow you down.
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Received on Fri Mar 26 2004 - 11:10:25 CST
