Messages in this thread | | | Date | Thu, 8 Feb 2001 12:44:22 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait |
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On Thu, 8 Feb 2001, Mikulas Patocka wrote:
> > > The problem is that aio_read and aio_write are pretty useless for ftp or > > > http server. You need aio_open. > > > > Could you explain this? > > If the server is sending many small files, disk spends huge amount time > walking directory tree and seeking to inodes. Maybe opening the file is > even slower than reading it - read is usually sequential but open needs to > seek at few areas of disk. > > And if you have one-threaded server using open, close, aio_read and > aio_write, you actually block the whole server while it is opening a > single file. This is not how async io is supposed to work.
Ok but this is not the point of the discussion.
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