[petsc-users] Multiple output using one viewer

[Alexander Grayver]

On 06.01.2012 01:17, Barry Smith wrote:
> On Jan 5, 2012, at 9:40 AM, Jed Brown wrote:
>
>> On Thu, Jan 5, 2012 at 09:36, Alexander Grayver<agrayver at gfz-potsdam.de>  wrote:
>> Maybe this should be noted in the documentation?
>>
>> Yes, I think the old file should be closed (if it exists), but I'll wait for comment.
>     I never thought about the case where someone called PetscViewerFileSetName() twice. I'm surprised that it works at all.
>
>      Yes, it should (IMHO) be changed to close the old file if used twice.
>
>     Barry
>
> BTW: It is also possible to put many vectors and matrices in the same file and read them in using several different ways using PetscBinaryRead(). I (personally) think any approach that involves creating hundreds of files is nuts.

This is not always convinient to store everything in one file, but in 
some cases I do want to use it. I haven't found any examples on that. Do 
I have to use FILE_MODE_APPEND and then write? What happens if file 
doesn't exist?

Regards,
Alexander