| Subject | Re: Why nbackup takes very long time for 40G database |
|---|---|
| Author | Dmitry Yemanov |
| Post date | 2014-07-31T10:10:48Z |
31.07.2014 13:32, Xifeng Wen wrote:
Under different circumstances, either -D ON or -D OFF may work faster.
Worth trying in your environment.
Dmitry
>> Did you try playing with the -D switch for nbackup?Direct I/O means database copying without help of a filesystem cache.
>
> I do not understand this parameter and can not find any documentation
> about it. What does this direct I/O mean? Does it help anything?
Under different circumstances, either -D ON or -D OFF may work faster.
Worth trying in your environment.
Dmitry