asynchronous DNS & stub resolver

[steven chang_1]

hello:

Does any body know what asynchronous dns & stub resolver means.For some web server configuration, such as sun one web server, enable this setting would get a better performance. But I want to know how it works.
Thank you..

Steven chang

[Geoff Wild]

I believe asynchronous dns means it can handle multiple queries at the same time.

Stub resolver - the resolver is just a set of library routines linked into programs (like telnet and ftp)...it has the smarts to put together a query, wait for an answer, resend the query if it isn't answered...and thats about it. Whereas other resolvers can do things like build up a cache of queries already retrieved from name servers...

Rgds...Geoff

[Mark Greene_1]

async DNS is a way to handle multiple DNS requests in a supposedly more efficent manner, because they don't have to be resolved in the order in which they were requested.

See here for more info:

http://groups.google.com/groups?selm=mcpb4tghnq29u9o4hddb17h4308qoj2v9c%404ax.com&oe=UTF-8&output=gplain

(watch the line wrap)

mark

[steven chang_1]

here is what I found
"Synchronous DNS is a way of doing a lookup for a machine name that will block all threads of execution in an application until a request for the reply has been received."

Thank you for your help!!

Steven Chang