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IDS Forum

RES: Need backup advice

Posted By: Celso Cabral Coimbra
Date: Wednesday, 7 November 2012, at 7:30 a.m.

In Response To: Re: Need backup advice (KARL OLIVER)

If you have in your environment few and/or slow disks, using onbar with many threads in parallel will drive you to poor performance, because you will face I/O bottleneck reading the data in the database. Other issue that many times many people forget is: the production is running in parallel as well.
I don't believe that parallelism is always the Best solution, it depends on your entire environment. Sometimes the bottleneck is not to save the tape during the backup window, but reading the data.
If you have many and fast disks and many tape drives, you should choose onbar. If you have few or slow disks and only one tape drive, ontape should be the best option.

Best regards,

Celso Cabral Coimbra
Administrador de Banco de Dados
ClearTech Ltda
"Trust at the heart of Communications"
Tel. (11) 3576-4509

-----Mensagem original-----
De: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Em nome de KARL OLIVER
Enviada em: terça-feira, 6 de novembro de 2012 18:00
Para: ids@iiug.org
Assunto: Re: Need backup advice [28714]

I prefer ontape. agree with Dans comments- about restoring to other systems.
For large system onbar is probbaly better as you can use the Parallelism feature.
We tried using onbar with comvault at our site with bad results. Time to back up db 9 hours, with on tape 40 mins. This was not a fault with onbar but rather with how comvault handled things,and how it was set up- another agency runs our comvault backups.

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