[horde] IMP: Set tmpdir for export of mbox

[Frank Richter]

Jens Wahnes wrote:
> Frank Richter wrote:
>
>> when our users export a large mailbox (up to 50 GByte) it fills up our
>> /tmp on the Horde server.
>> Is there a way to set the tmpdir to use for the export function?
>
> I think you'd have to change PHP's sys_temp_dir for that.  At least that's 
> what we did and this allows us to have these kind of temp files in a 
> convenient location. Clearly, this might collide with the desired location 
> of other temp files (Horde or PHP), if you have got special file systems 
> that you would like to use for those temp files.

Thanks. For our PHP 5.4.16 I have to set an environment TMPDIR pointing to 
the right directory.
Shall I file an enhancement request for this – IMP export should take 
$conf[tmpdir] to stre temp file(s) ?

>
> When our users try to export larger mailboxes, we notice that the process 
> consumes really large amounts of CPU time. With our setup, it's the CPU 
> usage that's problematic, rather than the storage space needed during the 
> export. Is that not an issue in your case? I'm not talking about mailboxes 
> of 50 GB or such; exporting a mailbox of, say, 1 GB is quite tedious 
> already, let alone several users doing this at the same time.

Oh yes, while trying these settings I realise this CPU load, too. It writes 
every single line to the temp file – it really take ages to finish (> 75 
minutes for a folder of 380 MB, and still running).
So, currently export is, well, kind of problematic.

- Frank


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