again async io
is at rambler-co.ru
Thu Nov 23 11:05:05 MSK 2006
On Wed, 22 Nov 2006, Aleksandar Lazic wrote:
> I have read some docs and some papers and have changed my opinion about
> the asyncIO.
> Personally I think it could help to improve the performance, but I
> haven't the glue, yet, to add it into the nginx.
Last entries about AIO in http://blog.lighttpd.net/ show perfomance
1) Tests were made against single process lighttpd, but not
2) Whether some improvement will be for 1000 parallel downloads.
3) libaio requires linking with -lpthread, so it's seems it's not
a true AIO implemenation but emulation using threads.
4) I'm not sure that /dev/shm|mmap|libaio|sendfile combination will be
stable interface. For example, epoll had several interface changes.
More information about the nginx