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2016.01.25 18:21 "checkit_tiff, fixit_tiff - question about memmapped I/O, and invitation for quality checks", by Andreas Romeyke
2016.01.28 01:17 "Re: checkit_tiff, fixit_tiff - question about memmapped I/O, and invitation for quality checks", by <pullmoll@t-online.de>

2016.01.25 18:21 "checkit_tiff, fixit_tiff - question about memmapped I/O, and invitation for quality checks", by Andreas Romeyke

Dear libtiff-Developers,

Because we need some validation and repair tools for TIFFs by reasons of
digital preservation, we developed 

* fixit_tiff to repair broken baseline TIFFs (see
https://github.com/SLUB-digitalpreservation/fixit_tiff)
* checkit_tiff to validate baseline TIFFs against fine granular rules (see
https://github.com/SLUB-digitalpreservation/checkit_tiff)

To ensure that we does not have (a lot of) bugs included, we invite you to
test both tools and verify stability of checkit_tiff against your TIFF
collection.

Additional I have a question about the flag "rm"/"rM" of the TIFFOpen()
function. I am right, that the "rM" uses memmapped I/O? But with my tests,
it does not differ in speed with "rm"-mode. Could you explain, how it works
in detail?

Thanks in advance.

Mit freundlichen Grüßen
With best regards,

Andreas Romeyke
--
team member "long-term preservation"

Saxon State- and University Library Dresden (SLUB)
Department 2 (IT), Division 2.3 (infrastructure and digital long-term
preservation) 
Zellescher Weg 18 | 01069 Dresden
phone: +49 351 4677 216
E-Mail: Andreas.Romeyke@slub-dresden.de 
http://www.slub-dresden.de/ | @slubdresden


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