[asio] async_resolve problems
Hi! I've written _test_ dummy service, working in single thread (prototype for more useful app). It accepts strings like "google.com" (and "gosdkfjslfjle.com"), resolves them and returns ip of the host. I noticed, that bad hostnames make it think too much, preventing other requests from being processed. So, I decided to use async_resolve approach, hoping that now I will be able to handle many requests concurrently. But it seems that async_resolve is not as async as desired - it feels like separate thread resolves in sync way all hosts. The question is - how to make async_resolve be really async? Am I missing something?
On Mon, Jul 20, 2009 at 12:18 PM, Roman Shmelev
Hi!
I've written _test_ dummy service, working in single thread (prototype for more useful app). It accepts strings like "google.com" (and "gosdkfjslfjle.com"), resolves them and returns ip of the host.
I noticed, that bad hostnames make it think too much, preventing other requests from being processed. So, I decided to use async_resolve approach, hoping that now I will be able to handle many requests concurrently. But it seems that async_resolve is not as async as desired - it feels like separate thread resolves in sync way all hosts.
The question is - how to make async_resolve be really async? Am I missing something?
What asio really needs is a DNS library. Some OSes don't have any async DNS support, so its only option right now is to serialize requests. -- Cory Nelson http://int64.org
What asio really needs is a DNS library. Some OSes don't have any async DNS support, so its only option right now is to serialize requests.
Thanks for reply, Cory! Does anybody know about probability of appearing such DNS library in ASIO?
You can try and ask ASIO author on the ASIO mailing list: http://sourceforge.net/mailarchive/forum.php?forum_name=asio-users
participants (3)
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Cory Nelson -
Igor R -
Roman Shmelev