[petsc-users] VecView() and binary output

[Mohamad M. Nasr-Azadani]

Thanks Alexander. That totally makes sense now.

Best,
Mohamad


On Thu, Jan 19, 2012 at 1:23 AM, Alexander Grayver
<agrayver at gfz-potsdam.de>wrote:

> **
> There is a header in the beginning of the file. The info in the header
> defines which object type is stored and its dimensions.
> The size of the header can vary depending on the stored object
> (Vec,Mat,etc) and type you use for indices (int32,int64).
>
> For Vec object and int32 you have one integer defining the code of the Vec
> object and another vector size. That sums up to 8 extra bytes.
>
>
> On 19.01.2012 09:20, Mohamad M. Nasr-Azadani wrote:
>
> Hi guys,
>
>  I use VecView() in conjunction with  PetscViewerBinaryOpen()
>  to write the binary data associated with a 3D data obtained from DA
> structured arrays.
>  I noticed that on my machine, the size of the file is 8 bytes bigger
> than the size of the data.
>  Could someone tell me where that extra 8 byte is stored and how it is
> going help?
>
>   best
>  Mohamad
> *
> *
>
>
>
> --
> Regards,
> Alexander
>
>
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