is it possible to connect to memcached and check in access phase?

[Marcus Clyne]

Manlio Perillo wrote:
> Marcus Clyne ha scritto:
>>
>>> However, if the memcached serve is on localhost, and since the data 
>>> you exchange is small, it should be safe to use socket in blocking 
>>> mode.
>>>
>> A few months ago I wrote a basic Nginx module using both the newer 
>> libmemcached library and the older libmemcache by Sean Chittenden to 
>> get a value from memcached and set an Nginx variable.  Both were 
>> blocking (i.e. didn't use an asynchronous approach), and I only 
>> tested them on a local installation of memcached.  The quicker of the 
>> two was the older libmemcache library (by quite a lot, actually), 
>> probably because the code itself is simpler.
>>
>
> So, I suspect that a self written client should be even more quicker.
Yes, I would have thought so too, especially if you're only connecting 
to one memcached server.

> Did you use a persistent TCP connection?

Yes.

 > And you can also use UDP.

I didn't try this.

Overall, the performance was clearly most affected by the fact that it 
was blocking.  An async version I think would show much better results 
and closer together, because while being blocking the performance hit is 
multiplicative but as async it would be linear.

Marcus.