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Re: Trouble writing very large files [message #62668 is a reply to message #62650]

Sat, 27 September 2008 15:16

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Vince Hradil <vincehradil@gmail.com> writes:
> I want to write a very large array to a file. I'm trying:
>
> array = intarr(640,640,1073,15) ;; 13,185,024,000 bytes!
>
> openw, lun, 'foo.dat', /get_lun
> writeu, lun, array
> free_lun, lun
>
> IDL crashes when the writeu fires up.

Wait, if IDL crashes, how were you able to check the file pointer
location afterward??? If you mean that IDL reported an error but
continued to run, what was the error?

Craig

>
> print, !version
> { x86_64 Win32 Windows Microsoft Windows 7.0 Oct 25 2007 64
> 64}
>
> The pointer seems to expand okay:
>
> IDL> point_lun, -lun, pos
> IDL> help, pos
> POS LONG = 0
> IDL> point_lun, lun, 640ll * 640ll * 1073ll * 15ll * 2ll
> IDL> point_lun, -lun, pos
> IDL> help, pos
> POS LONG64 = 13185024000
> IDL> point_lun, lun, 0
> IDL> point_lun, -lun, pos
> IDL> help, pos
> POS LONG = 0

--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: cbmarkwardt+usenet@gmail.com
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[Message index]

		Re: Trouble writing very large files By: Jeremy Bailin on Tue, 30 September 2008 07:41
		Re: Trouble writing very large files By: David Fanning on Mon, 29 September 2008 09:04
		Re: Trouble writing very large files By: Vince Hradil on Mon, 29 September 2008 08:57
		Re: Trouble writing very large files By: Vince Hradil on Mon, 29 September 2008 07:16
		Re: Trouble writing very large files By: David Fanning on Mon, 29 September 2008 06:56
		Re: Trouble writing very large files By: Vince Hradil on Mon, 29 September 2008 06:51
		Re: Trouble writing very large files By: David Fanning on Mon, 29 September 2008 06:42
		Re: Trouble writing very large files By: Vince Hradil on Mon, 29 September 2008 06:31
		Re: Trouble writing very large files By: Craig Markwardt on Sat, 27 September 2008 15:16

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