Minimum hardware capacity for 35k e-mail scans/day

Julian Field MailScanner at
Tue Nov 20 17:11:27 GMT 2007

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shuttlebox wrote:
> On Nov 19, 2007 10:07 AM, Greg Matthews <gmatt at> wrote:
>> Steve Freegard wrote:
>>> Julian Field wrote:
>>>> Only 1 process at a time can hold the BerkeleyDB open and write to it.
>>>> Lots of processes can hold the RDBMS open at once. It's all down to
>>>> file locking.
>>> See
>> wow. Interesting stuff. So why does SA not use sdbm by default?
> I tested SDBM and it works just fine. My daily expire job went from
> over a minute to little over 10 seconds. Syncs are still completed so
> fast (0-1s) that I don't notice the difference. I wrote a wiki page on
> how to use SDBM based on Scott Silva's SQL guide.
I'm testing it out now. If it's as good as it is reckoned to be, how 
about I make it the default in new installations? (i.e. change to use it)


- -- 
Julian Field MEng CITP
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