Re: [squid-users] Is it true that even threaded Squid can't benefit from SMP systems?

Jeff Pang wrote:
> rihad:
>
>>
>> But what about Posix threads & Async IO? (./configure
>> --enable-async-io=2 ...)? Don't they take advantage of multiple
>> CPUs/cores/cache_dirs?
>>
>
> Yes Async-IO benefits from multi-cpu on disk IO, if you're using it.
> Squid's main daemon is a single process, that benefits nothing from SMP
> system.
>

Since disk I/O is often the bottleneck (given enough RAM), it can be
said that, thanks to async I/O, Squid mostly scales well to the number
of CPUs, issuing several disk I/O operations simultaneously &
asynchronously, so it can proceed to execute the main loop without
waiting for I/O completion? In that case that part of the FAQ needs
updating, I guess.
Received on Tue May 19 2009 - 12:47:58 MDT