Re: data.tmp: file too big [SOLVED]

Mark Johnson wrote:
> On Mon, May 18, 2009 at 1:20 PM, Hugo Monteiro <[email protected]> wrote:
>   
>> Complementary information:
>>
>> The (truncated) data.tmp file that gets created is 2GB.
>>
>> I have also tested for filesystem large file support, with dd, and i was
>> able to create a 4GB zeroed file so all seems fine.
>>     
>
> You probably need to recompile with Large File Support Enabled.  See:
>
>   http://www.unix.org/version2/whatsnew/lfs20mar.html
>
> Executive Summary:  Try tossing D_FILE _OFFSET_BITS=64 info conf-cc if
> you're using stock / patched djbdns.  For anybody using zinq (all two
> of you), try:
>
>   ./configure CFLAGS="-D_FILE_OFFSET_BITS=64"
>
> DISCLAIMER:  I'm no large files expert.  I haven't gotten around to
> researching this issue and testing zinq-djbdns to make sure it works
> with large ( > 2GB) files.
>
>   


Mark and all,

Adding -D_FILE_OFFSET_BITS=64 to the compilation flags did the trick. I 
now have a 2.9G data.cdb file. The bad news is that apparently 
tinydns/the system isn't capable of coping with that volume of information.

I have tried dedicating 2 cpus and 5GB of ram to that VM, and i even 
tried mounting the contents of ~tinydns/root in a tmpfs filesystem, 
hoping it would help. Tinydns continues to timeout and it IS a data 
volume problem. No problems with smaller cdb files.

Has anyone successfully run tinydns with such large cdb file?

I read, not long ago, a discussion, in this list, about a patch to keep 
tinydns from opening the cdb file for a certain interval. I believe it 
would help, but i'd like to know if people using such patch are happy 
with it. The data in it is rather static, so i was thinking about 5 mins 
interval. Would that be excessive?

TIA,

Hugo Monteiro.

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Hugo Monteiro
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Centro de Informática
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