Query in multiple databases

[Matthew Jew]

On May 26, 2009, at 2:12 AM, valentina-request at lists.macserve.net wrote:

>>> For search I think you self can start N search against of N dbs.
>>> May be in N threads to use more CPUs of computer.
>>> Results combine into new tmp table. RAM or disk...
>>
>> I thought access to Valentina engine was limited to one thread at a
>> time. (As of version 2.5.8)
>>
>> Previously, I had asked this:
>>
>>>> I asked if I still need to lock the entire engine, and I was hoping
>>>> for either "yes" or "no".
>>>
>>> Currently the answer is - Yes.
>>
>> Has this changed?
>>
>> If so, what are the rules now?
>
> Rules the same...
> Really, Cache will be single, so your app should use mutex.
>

If the rules are the same (meaning only one thread at a time),
how can he start "N search against N dbs. May be in N threads to use  
more CPUs of computer."
as you recommended to him?

- Matthew